Service Manual - Daikin AC

Service Manual

SiUS341504E

REYQ72-456TTJUREYQ72-456TYDN

R-410A Heat Recovery 60 Hz

SiUS341504E

R-410AHeat Recovery 60 Hz

ED ReferenceFor items below, please refer to Engineering Data.

1. Safety Cautions.......................................................................................... vi1.1 Warnings and Cautions Regarding Safety of Workers.................................vi1.2 Warnings and Cautions Regarding Safety of Users................................... viii

2. Used Icons ................................................................................................. xi

Part 1 General Information ..............................................................11. Model Names of Indoor/Outdoor Units........................................................2

1.1 Indoor Units .................................................................................................. 21.2 Outdoor Units ............................................................................................... 21.3 Air Treatment Equipment ............................................................................. 41.4 Branch Selector Unit .................................................................................... 4

2. External Appearance...................................................................................52.1 Indoor Units .................................................................................................. 52.2 Outdoor Units ............................................................................................... 62.3 Air Treatment Equipment ............................................................................. 72.4 Branch Selector Unit .................................................................................... 7

3. Combination of Outdoor Units.....................................................................83.1 REYQ-TYDN, REYQ-TTJU .......................................................................... 8

4. Interchangeability ........................................................................................95. Capacity Range.........................................................................................10

5.1 Combination Ratio...................................................................................... 105.2 Outdoor Unit Combinations ........................................................................ 105.3 Limitation of Capacity Index for Heat Recovery ......................................... 11

Part 2 Refrigerant Circuit .............................................................. 121. Refrigerant Circuit .....................................................................................13

1.1 REYQ72TYDN / REYQ72TTJU ................................................................. 131.2 REYQ96-168TYDN / REYQ96-168TTJU ................................................... 15

No. Item ED No. Page Remarks

1 Specifications EDUS331435-R1EDUS331435-R2

P.2-7P.2-7

2 Piping Diagrams ED331435-R1EDUS331435-R2

P.14-15P.14-15

3 Option List EDUS331435-R1EDUS331435-R2

P.116P.116

i Table of Contents

SiUS341504E

1.3 Branch Selector Unit Functional Parts ....................................................... 17

2. Functional Parts Layout ............................................................................232.1 REYQ72TYDN ........................................................................................... 232.2 REYQ96 / 120TYDN .................................................................................. 242.3 REYQ144 / 168TYDN ................................................................................ 252.4 REYQ72TTJU ............................................................................................ 262.5 REYQ96 / 120TTJU ................................................................................... 272.6 REYQ144 / 168TTJU ................................................................................. 28

3. Refrigerant Flow for Each Operation Mode...............................................293.1 REYQ72TYDN / REYQ72TTJU ................................................................. 293.2 REYQ96-168TYDN / REYQ96-168TTJU ................................................... 35

Part 3 Remote Controller ............................................................... 411. Wired Remote Controller...........................................................................42

1.1 Applicable Models ...................................................................................... 421.2 Names and Functions ................................................................................ 421.3 MAIN/SUB Setting when Using 2 Remote Controllers ............................... 441.4 Centralized Control Group No. Setting....................................................... 45

2. Wireless Remote Controller ......................................................................472.1 Applicable Models ...................................................................................... 472.2 Names and Functions ................................................................................ 472.3 Address and MAIN/SUB Setting................................................................. 49

3. Service Mode ............................................................................................503.1 BRC1E73 ................................................................................................... 50

Part 4 Function and Control........................................................... 521. Function General.......................................................................................53

1.1 Operation Mode.......................................................................................... 531.2 Stop Control ............................................................................................... 541.3 Standby Control.......................................................................................... 541.4 Startup Control ........................................................................................... 55

2. Basic Control.............................................................................................572.1 List of Functions in Normal Operation ........................................................ 572.2 Compressor PI Control............................................................................... 582.3 Operating Priority and Rotation of Compressors........................................ 582.4 Compressor Step Control........................................................................... 602.5 Electronic Expansion Valve PI Control....................................................... 632.6 Step Control of Outdoor Unit Fans ............................................................. 642.7 Heat Exchanger Control ............................................................................. 66

3. Protection Control .....................................................................................673.1 High Pressure Protection Control............................................................... 673.2 Low Pressure Protection Control................................................................ 693.3 Discharge Pipe Protection Control ............................................................. 703.4 Inverter Protection Control ......................................................................... 71

4. Special Control..........................................................................................724.1 Pump down Residual Operation................................................................. 72

Table of Contents ii

SiUS341504E

4.2 Oil Return Operation .................................................................................. 734.3 Defrost Operation ....................................................................................... 754.4 Cooling / Heating Mode Switching ............................................................. 76

5. Other Control.............................................................................................805.1 Backup Operation....................................................................................... 805.2 Demand Operation ..................................................................................... 805.3 Heating Operation Prohibition .................................................................... 80

6. Outline of Control (Indoor Unit) .................................................................816.1 Operation Flow Chart ................................................................................. 816.2 Thermostat Control..................................................................................... 836.3 Drain Pump Control.................................................................................... 856.4 Control of Electronic Expansion Valve ....................................................... 876.5 Freeze-up Prevention................................................................................. 886.6 Heater Control (Optional PCB KRP1B ... is required.) ............................... 896.7 List of Swing Flap Operations .................................................................... 906.8 Hot Start Control (In Heating Only) ............................................................ 916.9 Louver Control for Preventing Ceiling Dirt.................................................. 926.10 Heater Control (FXTQ) ............................................................................... 936.11 4 Step Thermostat Processing (FXTQ) ...................................................... 956.12 Interlocked with External Equipment (FXTQ) ............................................. 96

Part 5 Field Settings ...................................................................... 981. Test Operation ..........................................................................................99

1.1 Checks before Test Operation ................................................................... 991.2 Test Operation Checks............................................................................... 99

2. Field Setting from Remote Controller......................................................1002.1 Wired Remote Controller.......................................................................... 1002.2 Wireless Remote Controller ..................................................................... 1012.3 Simplified Remote Controller.................................................................... 1022.4 Setting Contents and Code No. for Indoor Units ...................................... 103

3. Field Setting from Outdoor Unit...............................................................1203.1 Accessing the BS Buttons on the Logic Board......................................... 1203.2 Operating the BS Buttons and DIP Switches on the Logic Board ............ 121

3.4 Monitoring Function and Field Settings .................................................... 1243.5 Cool / Heat Mode Changeover................................................................. 1303.6 Setting of Low Night Noise Operation and Demand Operation................ 131

4. Charging Refrigerant...............................................................................1364.1 Precautions .............................................................................................. 1364.2 Calculating the Additional Refrigerant Charge ......................................... 1364.3 Method for Adding Refrigerant ................................................................. 138

Part 6 Service Diagnosis..............................................................1431. Symptom-based Troubleshooting ...........................................................1452. Troubleshooting by Remote Controller ...................................................148

iii Table of Contents

SiUS341504E

2.1 Mode Access Operation ........................................................................... 1482.2 Procedure of Self-diagnosis by Remote Controller .................................. 1492.3 Error Code and Description...................................................................... 1522.4 Error Codes - Sub Codes ......................................................................... 154

3. Troubleshooting by Indication on the Remote Controller ........................1553.1 External Protection Device Abnormality ................................................... 1553.2 PCB Abnormality ...................................................................................... 1563.3 Drain Level Control System (S1L) Abnormality........................................ 1573.4 Fan Motor (M1F) Lock, Overload ............................................................. 1593.5 Indoor Unit Fan Motor Abnormality .......................................................... 1623.6 Indoor Unit Fan Motor Abnormality .......................................................... 1633.7 Overload / Overcurrent / Lock of Indoor Unit Fan Motor .......................... 1663.8 Swing Flap Motor (M1S) Abnormality....................................................... 1673.9 Power Supply Voltage Abnormality .......................................................... 1693.10 Electronic Expansion Valve Coil Abnormality / Dust Clogging ................. 1703.11 Electronic Expansion Valve Coil Abnormality........................................... 1713.12 Drain Level above Limit............................................................................ 1723.13 Capacity Determination Device Abnormality ............................................ 1733.14 Transmission Abnormality between Indoor Unit PCB and Fan PCB........ 1743.15 Thermistor Abnormality ............................................................................ 1763.16 Combination Error between Indoor Unit PCB and Fan PCB .................... 1773.17 Remote Sensor Abnormality .................................................................... 1783.18 Thermistor Abnormality ............................................................................ 1793.19 Humidity Sensor System Abnormality ...................................................... 1803.20 Room Temperature Thermistor in Remote Controller Abnormality .......... 1813.21 PCB Abnormality ...................................................................................... 1823.22 Actuation of High Pressure Switch ........................................................... 1833.23 Actuation of Low Pressure Sensor ........................................................... 1853.24 INV Compressor Motor Lock .................................................................... 1863.25 Compressor Damage Alarm..................................................................... 1883.26 Outdoor Unit Fan Motor Abnormality........................................................ 1903.27 Electronic Expansion Valve Coil Abnormality........................................... 1923.28 Discharge Pipe Temperature Abnormality ............................................... 1933.29 Wet Alarm................................................................................................. 1953.30 Refrigerant Overcharged.......................................................................... 1963.31 Harness Abnormality (between Control PCB and Inverter PCB) ............. 1973.32 Outdoor Unit Fan Motor Signal Abnormality............................................. 1983.33 Thermistor Abnormality ............................................................................ 2003.34 High Pressure Sensor Abnormality .......................................................... 2023.35 Low Pressure Sensor Abnormality ........................................................... 2033.36 Inverter PCB Abnormality......................................................................... 2043.37 Reactor Temperature Rise Abnormality ................................................... 2063.38 Inverter Radiation Fin Temperature Rise Abnormality ............................. 2073.39 INV Compressor Instantaneous Overcurrent ........................................... 2083.40 INV Compressor Overcurrent................................................................... 2103.41 INV Compressor Startup Abnormality ...................................................... 2123.42 Transmission Error between Inverter and Control PCB ........................... 2153.43 Power Supply Voltage Imbalance ............................................................ 217

Table of Contents iv

SiUS341504E

3.44 Reactor Temperature Abnormality ........................................................... 2193.45 Inverter Radiation Fin Temperature Abnormality ..................................... 2203.46 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or

Combination of PCB Abnormality............................................................. 2213.47 Refrigerant Shortage ................................................................................ 2223.48 Reverse Phase, Open Phase................................................................... 2233.49 Power Supply Insufficient or Instantaneous Abnormality ......................... 2243.50 Check Operation is not Executed............................................................. 2263.51 Transmission Error between Indoor Units and Outdoor Units.................. 2273.52 Transmission Error between Remote Controller and Indoor Unit............. 2303.53 Transmission Error between Outdoor Units ............................................. 2313.54 Transmission Error between Main and Sub Remote Controllers ............. 2373.55 Transmission Error between Indoor and Outdoor Units in the

Same System........................................................................................... 2383.56 Improper Combination of Indoor and Outdoor Units,

Indoor Units and Remote Controller......................................................... 2393.57 Address Duplication of Centralized Control Equipment ........................... 2423.58 Transmission Error between Centralized Control Equipment and

Indoor Unit ................................................................................................ 2433.59 System is not Set yet................................................................................ 2453.60 System Abnormality, Refrigerant System Address Undefined ................. 2463.61 Check ....................................................................................................... 248

Part 7 Appendix............................................................................2601. Wiring Diagrams......................................................................................261

1.1 Outdoor Units ........................................................................................... 2611.2 Indoor Units .............................................................................................. 267

v Table of Contents

SiUS341504E Safety Cautions

1. Safety CautionsBe sure to read the following safety cautions before conducting repair work.After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer.

Caution Items The caution items are classified into Warning and Caution. The Warning items are especially important since they can lead to death or serious injury if they are not followed closely. The Caution items can also lead to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety caution items described below.

Pictograms This symbol indicates the item for which caution must be exercised. The pictogram shows the item to which attention must be paid.

This symbol indicates the prohibited action. The prohibited item or action is shown in the illustration or near the symbol.

This symbol indicates the action that must be taken, or the instruction. The instruction is shown in the illustration or near the symbol.

1.1 Warnings and Cautions Regarding Safety of WorkersWarning

Do not store the equipment in a room with successive fire sources (e.g., naked flame, gas appliance, electric heater).

Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for repair.Working on the equipment that is connected to the power supply may cause an electrical shock.If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not touch any electrically charged sections of the equipment.

If the refrigerant gas is discharged during the repair work, do not touch the discharged refrigerant gas.The refrigerant gas may cause frostbite.

When disconnecting the suction or discharge pipe of the compressor at the welded section, evacuate the refrigerant gas completely at a well-ventilated place first.If there is gas remaining inside the compressor, the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected, and it may cause injury.

If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas may generate toxic gases when it contacts flames.

Be sure to discharge the capacitor completely before conducting repair work.The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit.A charged capacitor may cause an electrical shock.

vi

Safety Cautions SiUS341504E

Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug.Plugging or unplugging the power cable plug to operate the equipment may cause an electrical shock or fire.

Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m (6.5 ft)).Insufficient safety measures may cause a fall accident.

In case of R-32 / R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-32 / R-410A refrigerant.The use of materials for R-22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle as well as an equipment failure.

Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R-22) in the refrigerant system.If air enters the refrigerating system, an excessively high pressure results, causing equipment damage and injury.

Warning

Caution

Do not repair the electrical components with wet hands.Working on the equipment with wet hands may cause an electrical shock.

Do not clean the air conditioner by splashing water.Washing the unit with water may cause an electrical shock.

Be sure to provide the earth / grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

Be sure to turn off the power switch and unplug the power cable when cleaning the equipment.The internal fan rotates at a high speed, and may cause injury.

Be sure to conduct repair work with appropriate tools.The use of inappropriate tools may cause injury.

vii


1.2 Warnings and Cautions Regarding Safety of Users

Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work.Working on the unit when the refrigerating cycle section is hot may cause burns.

Use the welder in a well-ventilated place.Using the welder in an enclosed room may cause oxygen deficiency.

Caution

Warning

Do not store the equipment in a room with successive fire sources (e.g., naked flame, gas appliance, electric heater).

Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment.The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.

If the power cable and lead wires have scratches or deteriorated, be sure to replace them.Damaged cable and wires may cause an electrical shock, excessive heat generation or fire.

Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it may cause an electrical shock, excessive heat generation or fire.

Be sure to use an exclusive power circuit for the equipment, and follow the local technical standards related to the electrical equipment, the internal wiring regulations, and the instruction manual for installation when conducting electrical work.Insufficient power circuit capacity and improper electrical work may cause an electrical shock or fire.

Be sure to use the specified cable for wiring between the indoor and outdoor units.Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals.Improper connections may cause excessive heat generation or fire.

viii

Safety Cautions SiUS341504E

When wiring between the indoor and outdoor units, make sure that the terminal cover does not lift off or dismount because of the cable.If the cover is not mounted properly, the terminal connection section may cause an electrical shock, excessive heat generation or fire.

Do not damage or modify the power cable.Damaged or modified power cable may cause an electrical shock or fire.Placing heavy items on the power cable, and heating or pulling the power cable may damage the cable.

Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R-22) in the refrigerant system.If air enters the refrigerating system, an excessively high pressure results, causing equipment damage and injury.

If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant. After charging refrigerant, make sure that there is no refrigerant leak.If the leaking point cannot be located and the repair work must be stopped, be sure to perform pump-down and close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas itself is harmless, but it may generate toxic gases when it contacts flames, such as fan and other heaters, stoves and ranges.

When relocating the equipment, make sure that the new installation site has sufficient strength to withstand the weight of the equipment.If the installation site does not have sufficient strength and if the installation work is not conducted securely, the equipment may fall and cause injury.

Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely.If the plug has dust or loose connection, it may cause an electrical shock or fire.

Be sure to install the product correctly by using the provided standard installation frame.Incorrect use of the installation frame and improper installation may cause the equipment to fall, resulting in injury.

For unitary type only

Be sure to install the product securely in the installation frame mounted on the window frame.If the unit is not securely mounted, it may fall and cause injury.


When replacing the coin battery in the remote controller, be sure to dispose of the old battery to prevent children from swallowing it.If a child swallows the coin battery, see a doctor immediately.

Warning

ix


Caution

Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks.

Do not install the equipment in a place where there is a possibility of combustible gas leaks.If the combustible gas leaks and remains around the unit, it may cause a fire.

Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.Improper installation and connections may cause excessive heat generation, fire or an electrical shock.

If the installation platform or frame has corroded, replace it.Corroded installation platform or frame may cause the unit to fall, resulting in injury.

Check the earth / grounding, and repair it if the equipment is not properly earthed / grounded.Improper earth / grounding may cause an electrical shock.

Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher.Faulty insulation may cause an electrical shock.

Be sure to check the drainage of the indoor unit after the repair.Faulty drainage may cause the water to enter the room and wet the furniture and floor.

Do not tilt the unit when removing it.The water inside the unit may spill and wet the furniture and floor.

Be sure to install the packing and seal on the installation frame properly.If the packing and seal are not installed properly, water may enter the room and wet the furniture and floor.


x

Used Icons SiUS341504E

2. Used IconsThe following icons are used to attract the attention of the reader to specific information.

Icon Type of Information

Description

Warning

Warning A Warning is used when there is danger of personal injury.

Caution

Caution A Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get an unexpected result or has to restart (part of) a procedure.

Note:

Note A Note provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks.

Reference A Reference guides the reader to other places in this binder or in this manual, where he/she will find additional information on a specific topic.

xi

SiUS341504E

General Information 1

Part 1General Information

1. Model Names of Indoor/Outdoor Units........................................................21.1 Indoor Units .................................................................................................. 21.2 Outdoor Units ............................................................................................... 21.3 Air Treatment Equipment ............................................................................. 41.4 Branch Selector Unit .................................................................................... 4

2. External Appearance...................................................................................52.1 Indoor Units .................................................................................................. 52.2 Outdoor Units ............................................................................................... 62.3 Air Treatment Equipment ............................................................................. 72.4 Branch Selector Unit .................................................................................... 7

3. Combination of Outdoor Units.....................................................................83.1 REYQ-TYDN, REYQ-TTJU .......................................................................... 8

4. Interchangeability ........................................................................................95. Capacity Range.........................................................................................10

5.1 Combination Ratio...................................................................................... 105.2 Outdoor Unit Combinations ........................................................................ 105.3 Limitation of Capacity Index for Heat Recovery ......................................... 11

Model Names of Indoor/Outdoor Units SiUS341504E

1. Model Names of Indoor/Outdoor Units1.1 Indoor Units

VJ : 1 phase, 208/230 V, 60 HzU(VJU) : Standard Symbol

1.2 Outdoor UnitsREYQ-TYDN, REYQ-TTJU

YD(N) : 3 phase, 460 V, 60 HzTJ : 3 phase, 208/230 V, 60 HzU(TJU) : Standard Symbol

Capacity Range 0.6 ton 0.8 ton 1 ton 1.25 ton 1.5 ton 2 ton 2.5 ton 3 ton 3.5 ton 4 ton 4.5 ton 6 ton 8 ton Power Supply, StandardCapacity Index 7.5 9.5 12 15 18 24 30 36 42 48 54 72 96

Ceiling Mounted Cassette (Round Flow with Sensing) Type

FXFQ 07T 09T 12T 15T 18T 24T 30T 36T — 48T — — —VJU

Ceiling Mounted Cassette (Round Flow) Type FXFQ — 09P 12P — 18P 24P 30P 36P — 48P — — —

4 Way Ceiling Mounted Cassette (2'×2') Type FXZQ 07M 09M 12M 15M 18M — — — — — — — — VJU9

Slim Ceiling Mounted Duct Type FXDQ 07M 09M 12M — 18M 24M — — — — — — —

VJU

Ceiling Mounted Duct Type (Middle and High Static Pressure) FXMQ 07PB 09PB 12PB 15PB 18PB 24PB 30PB 36PB — 48PB 54PB — —

Ceiling Mounted Duct Type FXMQ — — — — — — — — — — — 72M 96M

Ceiling Suspended Type FXHQ — — 12M — — 24M — 36M — — — — —Wall Mounted Type FXAQ 07P 09P 12P — 18P 24P — — — — — — —

4-Way Blow Ceiling-Suspended Type FXUQ — — — — 18P 24P 30P 36P — — — — —

Floor Standing Type FXLQ 07M 09M 12M — 18M 24M — — — — — — —Concealed Floor Standing Type FXNQ 07M 09M 12M — 18M 24M — — — — — — —

Vertical Air Handling Unit FXTQ — — 12PA — 18PA 24PA 30PA 36PA 42PA 48PA 54PA — —

Capacity Range 6 ton 8 ton 10 ton 12 ton 14 ton 16 ton 18 ton 20 ton 22 ton Power Supply, StandardCapacity Index 72 96 120 144 168 192 216 240 264

Heat Recovery460 V REYQ- 72T 96T 120T 144T 168T 192T 216T 240T 264T YDN

208/230 V REYQ- 72T 96T 120T 144T 168T 192T 216T 240T 264T TJU

Capacity Range 24 ton 26 ton 28 ton 30 ton 32 ton 34 ton 36 ton 38 ton Power Supply, StandardCapacity Index 288 312 336 360 384 408 432 456

Heat Recovery460 V REYQ- 288T 312T 336T 360T 384T 408T 432T 456T YDN208/230 V REYQ- 288T 312T 336T 360T 384T 408T 432T 456T TJU

2 General Information

SiUS341504E Model Names of Indoor/Outdoor Units

1.2.1 Combination of Outdoor Units (Heat Recovery 460 V)REYQ-TYDN

1.2.2 Combination of Outdoor Units (Heat Recovery 208/230 V)REYQ-TTJU

Model name REYQ72TYDN REYQ96TYDN REYQ120TYDN REYQ144TYDN REYQ168TYDNOutdoor unit 1 REYQ72TYDN REYQ96TYDN REYQ120TYDN REYQ144TYDN REYQ168TYDN

Model name REYQ192TYDN REYQ216TYDN REYQ240TYDN REYQ264TYDN REYQ288TYDNOutdoor unit 1 REYQ72TYDN REYQ96TYDN REYQ96TYDN REYQ120TYDN REYQ144TYDNOutdoor unit 2 REYQ120TYDN REYQ120TYDN REYQ144TYDN REYQ144TYDN REYQ144TYDN

Model name REYQ312TYDN REYQ336TYDN REYQ360TYDN REYQ384TYDN REYQ408TYDNOutdoor unit 1 REYQ144TYDN REYQ168TYDN REYQ120TYDN REYQ96TYDN REYQ96TYDNOutdoor unit 2 REYQ168TYDN REYQ168TYDN REYQ120TYDN REYQ120TYDN REYQ144TYDNOutdoor unit 3 — — REYQ120TYDN REYQ168TYDN REYQ168TYDN

Model name REYQ432TYDN REYQ456TYDNOutdoor unit 1 REYQ144TYDN REYQ144TYDNOutdoor unit 2 REYQ144TYDN REYQ144TYDNOutdoor unit 3 REYQ144TYDN REYQ168TYDN

Model name REYQ72TTJU REYQ96TTJU REYQ120TTJU REYQ144TTJU REYQ168TTJUOutdoor unit 1 REYQ72TTJU REYQ96TTJU REYQ120TTJU REYQ144TTJU REYQ168TTJU

Model name REYQ192TTJU REYQ216TTJU REYQ240TTJU REYQ264TTJU REYQ288TTJUOutdoor unit 1 REYQ72TTJU REYQ96TTJU REYQ96TTJU REYQ120TTJU REYQ144TTJUOutdoor unit 2 REYQ120TTJU REYQ120TTJU REYQ144TTJU REYQ144TTJU REYQ144TTJU

Model name REYQ312TTJU REYQ336TTJU REYQ360TTJU REYQ384TTJU REYQ408TTJUOutdoor unit 1 REYQ144TTJU REYQ168TTJU REYQ120TTJU REYQ96TTJU REYQ96TTJUOutdoor unit 2 REYQ168TTJU REYQ168TTJU REYQ120TTJU REYQ120TTJU REYQ144TTJUOutdoor unit 3 — — REYQ120TTJU REYQ168TTJU REYQ168TTJU

Model name REYQ432TTJU REYQ456TTJUOutdoor unit 1 REYQ144TTJU REYQ144TTJUOutdoor unit 2 REYQ144TTJU REYQ144TTJUOutdoor unit 3 REYQ144TTJU REYQ168TTJU


Model Names of Indoor/Outdoor Units SiUS341504E

1.3 Air Treatment EquipmentOutdoor Air Processing Unit

Energy Recovery Ventilator (VAM series)

VJ : 1 phase, 208/230 V, 60 HzU(VJU) : Standard Symbol

1.4 Branch Selector UnitSingle Branch Selector Unit for Heat Recovery

Note: No interchangeability with BSVQ36/60/96PVJU.VJ: 1 phase, 208/230 V, 60 Hz

Multi Branch Selector Unit for Heat Recovery

Note: No interchangeability with BSV4/6Q36PVJU.VJ: 1 phase, 208/230 V, 60 Hz

Series Model Name Power Supply, Standard

FXMQ 48MF 72MF 96MF VJU


VAM 300G 470G 600G 1200G VJU


Heat Recovery BSQ 36T 60T 96T VJ


Heat Recovery BS 4Q54T 6Q54T 8Q54T 10Q54T 12Q54T VJ


SiUS341504E External Appearance

2. External Appearance2.1 Indoor UnitsCeiling mounted cassette (Round flow with sensing) type

FXFQ-T

Shown with BYCQ125B-W1

Ceiling suspended type

FXHQ-M

Ceiling mounted cassette (Round flow) type

FXFQ-P

Shown with BYCP125K-W1

Wall mounted type

FXAQ-P

4 way ceiling mounted cassette (2’×2’) type

FXZQ-M

Shown with BYFQ60B8W1U

4-way blow ceiling-suspended type

FXUQ-P

Slim ceiling mounted duct type

FXDQ-M

Floor standing type

FXLQ-M

Ceiling mounted duct type (Middle and high static pressure)

FXMQ-PB

Concealed floor standing type

FXNQ-M

Ceiling mounted duct type

FXMQ-M

Vertical air handling unit

FXTQ-PA


External Appearance SiUS341504E

2.2 Outdoor Units2.2.1 REYQ-TYDN, REYQ-TTJUSingle Outdoor Units

Double Outdoor Units

Triple Outdoor Units

REYQ96 / 120 / 144 / 168TYDNREYQ96 / 120 / 144 / 168TTJU

REYQ72TYDNREYQ72TTJU


REYQ216 / 240 / 264 / 288 / 312 / 336TYDNREYQ216 / 240 / 264 / 288 / 312 / 336TTJU

REYQ360 / 384 / 408 / 432 / 456TYDNREYQ360 / 384 / 408 / 432 / 456TTJU


SiUS341504E External Appearance

2.3 Air Treatment Equipment

2.4 Branch Selector Unit

Outdoor air processing unit

FXMQ-MF

Energy recovery ventilator (VAM series)

VAM-G

Single branch selector unit

BSQ-T

Multi branch selector unit

BS-Q54TVJ


Combination of Outdoor Units SiUS341504E

3. Combination of Outdoor Units3.1 REYQ-TYDN, REYQ-TTJU

Note: 1 For multiple connection, the outdoor unit multi connection piping kit (separately sold) is required.

System capacity Number of units

Module Outdoor Unit Multi Connection Piping Kit 1Ton HP kW 72 96 120 144 168

6 7.5 21.1 1

—

8 10 28.1 1

10 12.5 35.2 1

12 15 42.2 1

14 17.5 49.2 1

16 20 56.3 2

BHFP26P100U

18 22.5 63.3 2

20 25 70.3 2

22 27.5 77.4 2

24 30 84.4 2

26 32.5 91.4 2

28 35 98.5 2

30 37.5 105.5 3

BHFP26P151U

32 40 112.5 3

34 42.5 119.6 3

36 45 126.6 3

38 47.5 133.6 3


SiUS341504E Interchangeability

4. InterchangeabilityBranch Selector unit New Branch Selector unit (Reference)

Current Branch Selector unit

Single Branch Selector unit

Multi Branch Selector unit

Single Branch Selector unit


Outdoor unit

BSQ36TVJBSQ60TVJBSQ96TVJ

BS4Q54TVJBS6Q54TVJBS8Q54TVJBS10Q54TVJBS12Q54TVJ

BSVQ36PVJUBSVQ60PVJUBSVQ96PVJU

BSV4Q36PVJUBSV6Q36PVJU

Heat Recovery REYQ-TREYQ-TYDN Connectable Connectable Not connectable Not connectable

REYQ-TTJU Connectable Connectable Not connectable Not connectable


Capacity Range SiUS341504E

5. Capacity Range5.1 Combination Ratio

Notes: ∗1. If the operational capacity of indoor units is more than 130%, low airflow operation is enforced in all the indoor units. Refer to P.128 for detail.

∗2. When outdoor-air processing units (FXMQ-MF) and standard indoor units are connected, the total connection capacity of the outdoor-air processing units (FXMQ-MF) must not exceed 30% of the capacity index of the outdoor units. And the connection ratio must not exceed 100%.

5.2 Outdoor Unit CombinationsREYQ-TYDN, REYQ-TTJU

Note: ∗1.Values inside brackets are based on connection of indoor units rated at maximum capacity, 200% for single outdoor units, 160% for double outdoor units, and 130% for triple outdoor units.

Combination ratio =Total capacity index of the indoor units

Capacity index of the outdoor units

TypeMin.

combination ratio

Max. combination ratio

Types of connected indoor units Type of connected air treatment equipments

When using only FXDQ, FXMQ-PB,

FXAQ

When using only FXTQ, or at least one

FXFQ07 or FXFQ09

Other indoor unit

models

FXMQ-MF

When FXMQ-MF is only connected

When FXMQ-MF and indoor units are connected

Single outdoor units

50% 200% ∗1 130%

200% ∗1

100% 100% ∗2Double outdoor units 160% ∗1

Triple outdoor units 130%

Capacity Range 6 ton 8 ton 10 ton 12 ton 14 ton 16 ton 18 ton 20 ton 22 ton

REYQ 72TYDN72TTJU

96TYDN96TTJU

120TYDN120TTJU

144TYDN144TTJU

168TYDN168TTJU

192TYDN192TTJU

216TYDN216TTJU

240TYDN240TTJU

264TYDN264TTJU

Max. Number of Connectable Indoor Units 12 16 20 25 29 33 37 41 45

Total Capacity Index of Indoor Units to be Connected ∗1

36~93(144)

48~124(192)

60~156(240)

72~187(288)

84~218(336)

96~249(307)

108~280(346)

120~312(384)

132~343(422)

Capacity Range 24 ton 26 ton 28 ton 30 ton 32 ton 34 ton 36 ton 38 ton

REYQ 288TYDN288TTJU

312TYDN312TTJU

336TYDN336TTJU

360TYDN360TTJU

384TYDN384TTJU

408TYDN408TTJU

432TYDN432TTJU

456TYDN456TTJU

Max. Number of Connectable Indoor Units 49 54 58 62 64 64 64 64

Total Capacity Index of Indoor Units to be Connected ∗1

144~374(461)

156~405(499)

168~436(538)

180~468(468)

192~499(499)

204~530(530)

216~561(561)

228~592(592)


SiUS341504E Capacity Range

5.3 Limitation of Capacity Index for Heat RecoverySingle Branch Selector unit


Note: ∗1.When the total capacity of indoor units to be connected downstream is larger than 54 (Max. 96), use a junction pipe kit (KHRP26A250T, optional parts) to join 2 connections downstream from the Branch Selector unit.

Model BSQ36TVJ BSQ60TVJ BSQ96TVJ

Maximum number of connectable indoor units 4 8 8

Total capacity index of connectable indoor units 36 or less More than 36 and 60 or less More than 60 and 96 or less

Model BS4Q54TVJ BS6Q54TVJ BS8Q54TVJ BS10Q54TVJ BS14Q54TVJ

Maximum number of connectable indoor units per branch 5 5 5 5 5

Number of branches 4 6 8 10 12

Maximum capacity index of connectable indoor units 144 or less 216 or less 290 or less 290 or less 290 or less

Maximum capacity index of connectable indoor units per branch (∗1) 54 or less 54 or less 54 or less 54 or less 54 or less

Suction gas pipingLiquid piping

Indoor unit(Heating)

Indoor unit(Cooling)

Indoor unit∗(Cooling only)

Heat Recovery operation!

Branch Selector unit

Branch Selector unit

Heat Recovery

Outdoor unit

High and low pressure gas piping

∗ For indoor units used for cooling only (do not connect to Branch Selector unit when using for Heat Recovery), total capacity index must be 50% or less than the capacity index of the outdoor units.


SiUS341504E

12 Refrigerant Circuit

Part 2Refrigerant Circuit

1. Refrigerant Circuit .....................................................................................131.1 REYQ72TYDN / REYQ72TTJU ................................................................. 131.2 REYQ96-168TYDN / REYQ96-168TTJU ................................................... 151.3 Branch Selector Unit Functional Parts ....................................................... 17

2. Functional Parts Layout ............................................................................232.1 REYQ72TYDN ........................................................................................... 232.2 REYQ96 / 120TYDN .................................................................................. 242.3 REYQ144 / 168TYDN ................................................................................ 252.4 REYQ72TTJU ............................................................................................ 262.5 REYQ96 / 120TTJU ................................................................................... 272.6 REYQ144 / 168TTJU ................................................................................. 28

3. Refrigerant Flow for Each Operation Mode...............................................293.1 REYQ72TYDN / REYQ72TTJU ................................................................. 293.2 REYQ96-168TYDN / REYQ96-168TTJU ................................................... 35

SiUS341504E Refrigerant Circuit

1. Refrigerant Circuit1.1 REYQ72TYDN / REYQ72TTJU

U

No. in refrigerant

system diagram

Electric symbol Name Major function

(1) M1C Inverter compressor (INV) Inverter compressor is operated on frequencies between 52 Hz to 210 Hz by using the inverter. Compressor operation steps: Refer to P.60~

(2) M1F Inverter fan Because the system is an air heat exchange type, the fan is operated at 9-step rotation speed by using the inverter.

(3) Y1E Electronic expansion valve (Heat exchanger upper)

While in heating, PI control is applied to keep the outlet superheated degree of air heat exchanger constant.

(4) Y2E Electronic expansion valve (Subcooling heat exchanger)

PI control is applied to keep the outlet superheated degree of subcooling heat exchanger constant.

(5) Y3E Electronic expansion valve (Heat exchanger lower)


(6) Y4E Electronic expansion valve (Receiver gas purge) Used to collect the refrigerant to receiver.

(7) Y5E Electronic expansion valve (Refrigerant cooling)

Used to control the refrigerant amount to cool the diode bridge and power module of the inverter PCB.

(8) Y6E Electronic expansion valve (Leak detection) Used to detect refrigerant leakage.

(9) Y1S Solenoid valve (OS oil return) Used to return oil from the oil separator to the compressor.(10) Y3S Solenoid valve (Liquid shutoff) Used to return oil from the accumulator to the compressor.(11) Y4S Four way valve (HP/LP gas) Used to switch dual pressure gas pipe to high pressure or low pressure.

(12) Y5S Four way valve(Heat exchanger lower)

Used to switch outdoor unit heat exchanger to evaporator or condenser.(13) Y6S Four way valve

(Heat exchanger upper)(14) S1NPH High pressure sensor Used to detect the high pressure.(15) S1NPL Low pressure sensor Used to detect the low pressure.

(16) S1PH High pressure switch(For INV compressor)

This functions when pressure increases to stop operation and avoid high pressure increase in the fault operation.

(17) — Pressure regulating valve (Liquid pipe)

This is used when pressure increases, to prevent any damage on components caused by pressure increase in transport or storage.

(18) — Subcooling heat exchanger Apply subcooling to liquid refrigerant.

(19) — Capillary tube Used to return the refrigerating oil separated through the oil separator to the INV compressor.

(20) R1T Thermistor (Outdoor air) Used to detect outdoor air temperature, correct discharge pipe temperature and others.(21) R2T Thermistor (M1C discharge) Used to detect discharge pipe temperature.(22) R3T Thermistor (Receiver inlet) Used to detect liquid pipe temperature of receiver inlet.

(23) R4T Thermistor (Heat exchanger liquid upper)

This detects temperature of liquid pipe for air heat exchanger.(24) R5T Thermistor (Heat exchanger

liquid lower)(25) R6T Thermistor (Subcooling gas) Used to detect outdoor air temperature, correct discharge pipe temperature and others.(26) R7T Thermistor (Subcooling liquid) This detects temperature of liquid pipe for subcooling heat exchanger.

(27) R8T Thermistor (Heat exchanger gas upper)

This detects temperature of gas pipe for air heat exchanger.(28) R9T Thermistor (Heat exchanger

gas lower)(29) R10T Thermistor (Suction) Used to detect suction pipe temperature.

(30) R11T Thermistor (Deicer) Used to detect liquid pipe temperature of air heat exchanger. Used to make judgements on defrosting operation.

(31) R12T Thermistor (Comp. suction) Used to detect suction pipe temperature of compressor.

(32) R13T Thermistor(Receiver gas purge) Used to detect gas pipe temperature of receiver gas purge piping.

(33) R14T Thermistor (M1C body) Detects compressor surface temperature, this switch is activated at surface temperature of 120°C (248°F) or more to stop the compressor.

(34) R15T Thermistor (Leak detection) The thermistor detects refrigerant leakage.

Refrigerant Circuit 13

Refrigerant Circuit SiUS341504E

REYQ72TYDN / REYQ72TTJU

Che

ck v

alve

Che

ck v

alve

Filt

er

SV

Filt

er

Filt

er

Fan

Filt

erM

Filt

er

Filt

er

Filt

er

S1NP

H

Filt

er

S1P

HF

ilter

S1NP

L

SV

Com

pres

sor

Filt

er

Accu

mul

ator

Sto

p va

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( With

ser

vice

por

t φ5/

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. (7.

9mm

) fla

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onne

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n)

Liqu

id

pipe

High

/low

pres

sure

gas

pi

pe

Suc

tion

gas

pipe

Che

ck v

alve

Ele

ctro

nic

expa

nsio

n va

lve

Doub

le tu

be

heat

exc

hang

er

Ele

ctro

nic

expa

nsio

n va

lve

Cap

illar

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uid

Rece

iver F

usib

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plug

Pre

ssur

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ting

valv

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d va

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k va

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expa

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n va

lve

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ck

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va

lve

Cap

illar

y tu

be

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nic

expa

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n va

lve

Elec

troni

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pans

ion

valve

Hea

t sin

k

Che

ck v

alve

Oil

sepa

rato

r

Cap

illar

y tu

be

Sol

enoi

d va

lve

INV

Hig

h pr

essu

re

switc

h

Hig

h pr

essu

re

sens

or

Fou

r w

ay v

alve

Four

way

val

ve

Dou

ble

tube

he

at e

xcha

nger

Four

way

val

ve

Low

pre

ssur

e se

nsor

Fus

ible

pl

ugCap

illar

y tu

beC

harg

e po

rt

Ele

ctro

nic

expa

nsio

n va

lve

Che

ck v

alve

C: 3

D09

1128

(26)

(29)

(32)

(12)

(13)

(10)

(8)

(3)

(5)

(7)

(17)

(2)

(6)

(25)

(27)

(28)

(20)

(21)

(31)

(19)

(33)

(9)

(1)

(30)

(14)

(16)

(23)

(22)

(24)

(11)

(15)

(4)

(18)



1.2 REYQ96-168TYDN / REYQ96-168TTJUNo. in

refrigerant system diagram

Electric symbol Name Major function

(1) M1C Inverter compressor (INV 1) Inverter compressor is operated on frequencies between 52 Hz to 210 Hz by using the inverter. Compressor operation steps: Refer to P.60~(2) M2C Inverter compressor (INV 2)

(3) M1FInverter fan Because the system is an air heat exchange type, the fan is operated at 9-step rotation

speed by using the inverter.(4) M2F

(5) Y1E Electronic expansion valve (Heat exchanger upper)


(6) Y2E Electronic expansion valve (Subcooling heat exchanger)

PI control is applied to keep the outlet superheated degree of subcooling heat exchanger constant.

(7) Y3E Electronic expansion valve (Heat exchanger lower)


(8) Y4E Electronic expansion valve (Receiver gas purge) Used to collect the refrigerant to receiver.

(9) Y5E Electronic expansion valve (Refrigerant cooling)

Used to control the refrigerant amount to cool the diode bridge and power module of the inverter PCB.

(10) Y6E Electronic expansion valve (Leak detection) Used to detect refrigerant leakage.

(11) Y1S Solenoid valve(OS oil return 1) Used to return oil from the oil separator to the compressor (M1C).

(12) Y2S Solenoid valve(OS oil return 2) Used to return oil from the oil separator to the compressor (M2C).

(13) Y3S Solenoid valve (Liquid shutoff) Used to return oil from the accumulator to the compressor.(14) Y4S Four way valve (HP/LP gas) Used to switch dual pressure gas pipe to high pressure or low pressure.

(15) Y5S Four way valve(Heat exchanger lower)

Used to switch outdoor unit heat exchanger to evaporator or condenser.(16) Y6S Four way valve

(Heat exchanger upper)(17) S1NPH High pressure sensor Used to detect the high pressure.(18) S1NPL Low pressure sensor Used to detect the low pressure.

(19) S1PH High pressure switch(For INV 1 compressor) This functions when pressure increases to stop operation and avoid high pressure

increase in the fault operation.(20) S2PH High pressure switch

(For INV 2 compressor)

(21) — Pressure regulating valve (Liquid pipe)

This is used when pressure increases, to prevent any damage on components caused by pressure increase in transport or storage.

(22) — Subcooling heat exchanger Apply subcooling to liquid refrigerant.

(23) — Capillary tube Used to return the refrigerating oil separated through the oil separator to the INV 1 compressor.

(24) — Capillary tube Used to return the refrigerating oil separated through the oil separator to the INV 2 compressor.

(25) R1T Thermistor (Outdoor air) Used to detect outdoor air temperature, correct discharge pipe temperature and others.(26) R21T Thermistor (M1C discharge)

Used to detect discharge pipe temperature.(27) R22T Thermistor (M2C discharge)(28) R3T Thermistor (Receiver inlet) Used to detect liquid pipe temperature of receiver inlet.

(29) R4T Thermistor (Heat exchanger liquid upper)

This detects temperature of liquid pipe for air heat exchanger.(30) R5T Thermistor (Heat exchanger

liquid lower)

(31) R6T Thermistor (Subcooling gas)Used to detect gas pipe temperature on the evaporating side of subcooling heat exchanger. Used to exercise the constant control of superheated degree at the outlet of subcooling heat exchanger.

(32) R7T Thermistor (Subcooling liquid) This detects temperature of liquid pipe for subcooling heat exchanger.

(33) R8T Thermistor (Heat exchanger gas upper)

This detects temperature of gas pipe for air heat exchanger.(34) R9T Thermistor (Heat exchanger

gas lower)(35) R10T Thermistor (Suction) Used to detect suction pipe temperature.

(36) R11T Thermistor (Deicer) Used to detect liquid pipe temperature of air heat exchanger. Used to make judgements on defrosting operation.

(37) R12T Thermistor (Comp. suction) Used to detect suction pipe temperature of compressor.

(38) R13T Thermistor(Receiver gas purge) Used to detect gas pipe temperature of receiver gas purge piping.

(39) R14T Thermistor (M2C body) Detects compressor surface temperature, this switch is activated at surface temperature of 120°C (248°F) or more to stop the compressor. (144/168 class models only)

(40) R15T Thermistor (Leak detection) The thermistor detects refrigerant leakage.



REYQ96-168TYDN / REYQ96-168TTJU

Four

way

val

ve

Che

ck v

alve

Filt

erC

heck

val

ve

SV

Filt

er

Rece

iver

Filt

er

Fan

Fan

Filt

erM

MF

ilter

Filt

er

Filt

er

S1NP

HF

ilter

Filt

er

S2P

HS

1PH

Filt

erF

ilter

S1NP

L

SV

Com

pres

sor

Filt

er

Accu

mul

ator

Sto

p va

lve

( With

ser

vice

por

t φ5/

16in

. (7.

9mm

) fla

re c

onne

ctio

n)

Liqu

id

pipe

Che

ck v

alve

Chec

k va

lve

Ele

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nic

expa

nsio

n va

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Ele

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expa

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valve

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Fou

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Four

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val

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Dou

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nger

Four

way

val

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s pr

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sens

or

High

/low

pres

sure

gas

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tion

gas

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Fus

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port

INV

2

Hig

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sens

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Che

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1

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C: 3

D09

1127

(32)

(35)

(38)

(15)

(16)

(13)

(8)

(5) (7

)

(9)

(21)

(4)

(3)

(8)

(31)

(33)

(28)

(34)

(25)

(19)

(27)

(2)

(12)

(37)

(39)

(26)

(1)

(11)

(23)

(24)(36)

(17)

(20)

(29)

(30)

(14)

(18)

(6)

(22)



1.3 Branch Selector Unit Functional PartsSingle Branch Selector UnitBSQ36-96TVJ

Note: Factory setting of all EV opening: 60 pulse

No. Name Electric symbol Function

1 Electronic expansion valve (EVH) Y2E Opens while in heating operation or all indoor units are in cooling.(Max : 760 pulse)

2 Electronic expansion valve (EVL) Y3E Opens while in cooling. (Max : 760 pulse)

3 Electronic expansion valve (EVSC) Y1EIn simultaneous cooling and heating operation, it is used to subcooling liquid refrigerants when an indoor unit downstream of this Branch Selector unit is in heating. (Max : 480 pulse)

Filter

Filter Filter

Filter

Liquid pipe connection port

Gas pipe connection port

Double pipe heat exchanger

Electronic Expansion Valve

(EVSC)

HP/LP gas pipe connection port

Suction gas pipe connection port


(EVH)


(EVL)


(3)

(1)

(2)

4D085545A



Multi Branch Selector UnitBS4Q54TVJ

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

D unit

B unit

C unit

A unit


Suction gas pipe

connection port

HP

/LP gas pipe

connection port






(Subcooling)


(Subcooling)


(Subcooling)


(Subcooling)

Electronic Expansion Valve (HP/LP gas)

Electronic Expansion Valve (Suction)















3D086032A

(1)

(2)

(1)

(1)

(1)

(2)

(2)

(2)

(3)

(3)

(3)

(3)



BS6Q54TVJ

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter













Filter

Filter

Filter

Filter

Filter

Filter

B unit

A unit

C unit

D unit

E unit

F unit


Suction gas pipe

connection port

HP

/LP gas pipe

connection port















(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)

(1)

(1)

(1)

(1)

(1)

(1)

(2) (3)

(3)

(3)

(3)

(3)

(3)

(2)

(2)

(2)

(2)

(2)

3D086033A



BS8Q54TVJ

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

FilterElectronic Expansion Valve (HP/LP gas)
















Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

D unit

F unit

H unit

A unit

G unit

E unit

C unit

B unit

Gas pipe connection portLiquid pipe connection port








Suction gas pipe

connection port


HP

/LP gas pipe

connection port



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2) (3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

3D086034A



BS10Q54TVJ

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

F unit

B unit

G unit

J unitI unit

D unit

H unit

E unit

C unit

A unit


Suction gas pipe

connection port

HP

/LP gas pipe

connection port











































(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)

3D086035A

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2) (3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)



BS12Q54TVJ

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

Filter

FilterJ unitE

unitG

unitD

unitL unit

C unit

A unit

F unit

I unitH

unitB

unitK

unit





































Suction gas pipe

connection port


HP

/LP gas pipe

connection port



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)



(Subcooling)

3D086036A

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2) (3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)

(3)


SiUS341504E Functional Parts Layout

2. Functional Parts Layout2.1 REYQ72TYDNPlane View

Front View

C: 1P385179A

Electronic expansion valve (Refrigerant cooling)(Y5E)

Electronic expansion valve (Subcooling heat exchanger)(Y2E)

Four way valve (Heat exchanger lower)(Y5S)

Four way valve (Heat exchanger upper)(Y6S)

Thermistor (Heat exchanger gas lower)(R9T)

Thermistor (Heat exchanger gas upper)(R8T)

Four way valve (HP/LP gas)(Y4S)

Thermistor (M1C discharge)(R2T)

Thermistor (Suction)(R10T)

Solenoid valve (DS oil return)(Y1S)

Solenoid valve (Liquid shutoff)(Y3S)

Fan motor(M1F)

Low pressure sensor (S1NPL)

Thermistor (Deicer) (R11T)

Crankcase heater (E1HC)

Compressor (INV) (M1C)

Thermistor (M1C body) (R14T)

Thermistor (Receiver gas purge) (R13T)

Thermistor (Compressor suction) (R12T)

High pressure switch (S1PH)

High pressure sensor (S1NPH)


Functional Parts Layout SiUS341504E

2.2 REYQ96 / 120TYDNPlane View

Front View

C: 1P385180B








High pressure sensor(S1NPH)

Solenoid valve (DS oil return 1)(Y1S)




Thermistor (Outdoor air)(R1T)

Fan motor(M2F)


Low pressure sensor(S1NPL)

Electronic expansion valve (Heat exchanger upper)(Y1E)

Electronic expansion valve (Heat exchanger lower)(Y3E)

Thermistor (Deicer)(R11T)

Crankcase heater(E2HC)

Compressor (INV 2)(M2C)

Fan motor(M1F)


High pressure switch(S2PH)


Thermistor (Compressor suction)(R12T)

Thermistor (Receiver gas purge)(R13T)





2.3 REYQ144 / 168TYDNPlane View

Front View

C: 1P385181C

Electronic expansion valve (Subcooling heat exchanger)(Y2E)Four way valve (Heat exchanger upper)(Y6S)







Solenoid valve (DS oil return 1) (Y1S)


Solenoid valve (Liquid shutoff) (Y3S)


Fan motor (M2F)

Four way valve (HP/LP gas) (Y4S)



Thermistor (M2C body) (R14T)Crankcase heater (E2HC)Compressor (INV 2) (M2C)

Compressor (INV 1) (M1C)


Thermistor (Receiver gas purge) (R13T)


Thermistor (Compressor suction) (R12T)


Thermistor (Heat exchanger gas lower) (R9T)

Fan motor (M1F)

Thermistor (Outdoor air) (R1T)

Electronic expansion valve (Heat exchanger upper) (Y1E)

Electronic expansion valve (Heat exchanger lower) (Y3E)



2.4 REYQ72TTJUPlane View

Front View

C: 1P383624C



Solenoid valve (DS oil return)(Y1S)













Thermistor (M1C body)(R14T)

Compressor (INV)(M1C)

Fan motor (M1F)






2.5 REYQ96 / 120TTJUPlane View

Front View

C: 1P383625D













Thermistor (Outdoor air)(R1T)

Fan motor (M2F)



Electronic expansion valve (Heat exchanger upper)(Y1E)












Fan motor (M1F)



2.6 REYQ144 / 168TTJUPlane View

Front View

C: 1P383626D












Solenoid valve (Liquid shutoff) (Y3S)

Fan motor (M2F)

Four way valve (HP/LP gas) (Y4S)




Thermistor (M2C body) (R14T)


Electronic expansion valve (Heat exchanger upper) (Y1E)


Fan motor (M1F)









SiUS341504E Refrigerant Flow for Each Operation Mode

3. Refrigerant Flow for Each Operation Mode3.1 REYQ72TYDN / REYQ72TTJU3.1.1 Cooling Operation

High temperature, high pressure gas

High temperature, high pressure liquid

Low temperature, low pressure gas

Low temperature, low pressure liquid

Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

"OF

F"

Fan

"O

FF

"

Coo

ling

Uni

t

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

The

rmos

tat "

OF

F"

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

ON

"

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n

Check valveCheck valve

Filter

SV

Filter

Filter

FanFilter M Filter

Filter

Filter

S1NPH

Filter

S1PHFilter

S1NPL

SV

CompressorFilter

Accumulator

Stop valve (With service port φ5/16in. (7.9mm) flare connection)

Liquid pipe

Dual pressure gas pipe

Suction gas pipe

Check valve

Electronic expansion

valve

Double tube heat exchanger

Electronic expansion valve

Capillary tube Liquid

Receiver

Fusible plug

Pressure regulating

valve

Solenoid valve

Check valve


valve

Check valve

Check valve

Capillary tube


valve


Heat sink

Check valve

Oil separator

Capillary tube

Solenoid valve

INV

High pressure switch

High pressure sensor

Four way valve

Four way valve


Four way valve

Low pressure sensor

Fusible plug

Capillary tube

Charge port


valve

Check valve


Refrigerant Flow for Each Operation Mode SiUS341504E

3.1.2 Heating OperationHigh temperature, high pressure gas




Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

OF

F"

"OF

F"

Fan

"O

FF

"

Hea

ting

Uni

t

Hea

ting

Uni

t

"ON

"19

2 pu

lse

192

puls

e

Fan

"LL

"

The

rmos

tat "

ON

"

Hea

ting

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n


Filter

SV

Filter

Filter

FanFilter M Filter

Filter

Filter

S1NPH

Filter

S1PHFilter

S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe


Suction gas pipe

Check valve


valve




Receiver

Fusible plug

Pressure regulating

valve

Solenoid valve

Check valve


valve

Check valve

Check valve

Capillary tube


valve


Heat sink

Check valve

Oil separator

Capillary tube

Solenoid valve

INV



Four way valve

Four way valve


Four way valve

Low pressure sensor

Fusible plug

Capillary tube

Charge port


valve

Check valve



3.1.3 Simultaneous Cooling / Heating OperationHigh temperature, high pressure gas




Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

ON

"

"ON

"19

2 pu

lse

Fan

"LL

"

The

rmos

tat

"OF

F"

Hea

ting

Uni

t

Hea

ting

Uni

t

"ON

"

Fan

"O

N"

The

rmos

tat "

ON

"

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n


Filter

SV

Filter

Filter

FanFilter M Filter

Filter

Filter

S1NPH

Filter

S1PHFilter

S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe


Suction gas pipe

Check valve


valve




Receiver

Fusible plug

Pressure regulating

valve

Solenoid valve

Check valve


valve

Check valve

Check valve

Capillary tube


valve


Heat sink

Check valve

Oil separator

Capillary tube

Solenoid valve

INV



Four way valve

Four way valve


Four way valve

Low pressure sensor

Fusible plug

Capillary tube

Charge port


valve

Check valve



3.1.4 Cooling Oil Return OperationHigh temperature, high pressure gas





Filter

SV

Filter

Filter

FanFilter M Filter

Filter

Filter

S1NPH

Filter

S1PHFilter

S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe


Suction gas pipe

Check valve


valve




Receiver

Fusible plug

Pressure regulating

valve

Solenoid valve

Check valve


valve

Check valve

Check valve

Capillary tube


valve


Heat sink

Check valve

Oil separator

Capillary tube

Solenoid valve

INV



Four way valve

Four way valve


Four way valve

Low pressure sensor

Fusible plug

Capillary tube

Charge port


valve

Check valve

Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

OF

F"

"OF

F"

192

puls

e

Fan

"O

FF

"

Coo

ling

Uni

t

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

The

rmos

tat "

ON

"

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n



3.1.5 Defrost Heating Oil Return OperationHigh temperature, high pressure gas




Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

Indo

or U

nit

Indo

or U

nit

The

rmos

tat "

OF

F"

"OF

F"

Fan

"O

FF

"

Hea

ting

Uni

t

Hea

ting

Uni

t

"ON

"

224

puls

e

Fan

"LL

"

The

rmos

tat "

ON

"

Hea

ting

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n


Filter

SV

Filter

Filter

FanFilter M Filter

Filter

Filter

S1NPH

Filter

S1PHFilter

S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe


Suction gas pipe

Check valve


valve




Receiver

Fusible plug

Pressure regulating

valve

Solenoid valve

Check valve


valve

Check valve

Check valve

Capillary tube


valve


Heat sink

Check valve

Oil separator

Capillary tube

Solenoid valve

INV



Four way valve

Four way valve


Four way valve

Low pressure sensor

Fusible plug

Capillary tube

Charge port


valve

Check valve



3.1.6 Oil Return Operation at Simultaneous Cooling / Heating OperationHigh temperature, high pressure gas




Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

ON

"

"ON

"22

4 pu

lse

Fan

"O

N"

Hea

ting

Uni

t

Hea

ting

Uni

t

"ON

"

Fan

"O

N"

The

rmos

tat "

ON

"

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n


Filter

SV

Filter

Filter

FanFilter M Filter

Filter

Filter

S1NPH

Filter

S1PHFilter

S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe


Suction gas pipe

Check valve


valve




Receiver

Fusible plug

Pressure regulating

valve

Solenoid valve

Check valve


valve

Check valve

Check valve

Capillary tube


valve


Heat sink

Check valve

Oil separator

Capillary tube

Solenoid valve

INV



Four way valve

Four way valve


Four way valve

Low pressure sensor

Fusible plug

Capillary tube

Charge port


valve

Check valve



3.2 REYQ96-168TYDN / REYQ96-168TTJU3.2.1 Cooling Operation

High temperature, high pressure gas




Four way valve

Check valve

FilterCheck valve

SV

Filter

ReceiverFilter

Fan FanFilter MM Filter

Filter

Filter

S1NPH FilterFilter

S2PH S1PHFilterFilter

S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe

Check valve

Check valve


valve Electronic expansion

valve



Check valve

Solenoid valve

Capillary tube

Fusible plug

Pressure regulating

valve

Check valve

Check valve

Capillary tube


valve



Heat sink

Four way valve


Four way valve

Low pressure sensor


Suction gas pipe

Fusible plug

Capillary tube

Charge port

INV 2



Check valve

Oil Separator High pressure switch

CompressorINV 1

Capillary tube

Solenoid valve

Check valve

Oil Separator

Capillary tube

Solenoid valve

SV

Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

OF

F"

"OF

F"

Fan

"O

FF

"

Coo

ling

Uni

t

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

The

rmos

tat "

ON

"

Coo

ling

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n



3.2.2 Heating OperationHigh temperature, high pressure gas




Four way valve

Check valve

FilterCheck valve

SV

Filter

ReceiverFilter


Filter

Filter

S1NPH FilterFilter


S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe

Check valve

Check valve



valve



Check valve

Solenoid valve

Capillary tube

Fusible plug

Pressure regulating

valve

Check valve

Check valve

Capillary tube


valve



Heat sink

Four way valve


Four way valve

Low pressure sensor


Suction gas pipe

Fusible plug

Capillary tube

Charge port

INV 2



Check valve


CompressorINV 1

Capillary tube

Solenoid valve

Check valve

Oil Separator

Capillary tube

Solenoid valve

SV

Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VL)

Filt

er

Filt

erF

ilter

Filt

er

Filt

er

Filt

erF

ilter

Filt

er

Indo

or U

nit

The

rmos

tat "

OF

F"

"OF

F"

Fan

"O

FF

"

Hea

ting

Uni

t

Hea

ting

Uni

t

"ON

"19

2 pu

lse

192

puls

e

Fan

"LL

"

The

rmos

tat "

ON

"

Hea

ting

Uni

t

"ON

"

Fan

"O

N"

Indo

or u

nit

Ope

ratio

n



3.2.3 Simultaneous Cooling / Heating OperationHigh temperature, high pressure gas




Four way valve

Check valve

FilterCheck valve

SV

Filter

ReceiverFilter


Filter

Filter

S1NPH FilterFilter


S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe

Check valve

Check valve



valve



Check valve

Solenoid valve

Capillary tube

Fusible plug

Pressure regulating

valve

Check valve

Check valve

Capillary tube


valve



Heat sink

Four way valve


Four way valve

Low pressure sensor


Suction gas pipe

Fusible plug

Capillary tube

Charge port

INV 2



Check valve


CompressorINV 1

Capillary tube

Solenoid valve

Check valve

Oil Separator

Capillary tube

Solenoid valve

SV

Filt

er

Filt

erF

ilter

Filt

er

Dou

ble

pipe

he

at

exch

ange

rE

lect

roni

c E

xpan

sion

Val

ve

(EV

SC

)

Ele

ctro

nic

Exp

ansi

on V

alve

(E

VH

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3.2.4 Cooling Oil Return OperationHigh temperature, high pressure gas




Four way valve

Check valve

FilterCheck valve

SV

Filter

ReceiverFilter


Filter

Filter

S1NPH FilterFilter


S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe

Check valve

Check valve



valve



Check valve

Solenoid valve

Capillary tube

Fusible plug

Pressure regulating

valve

Check valve

Check valve

Capillary tube


valve



Heat sink

Four way valve


Four way valve

Low pressure sensor


Suction gas pipe

Fusible plug

Capillary tube

Charge port

INV 2



Check valve


CompressorINV 1

Capillary tube

Solenoid valve

Check valve

Oil Separator

Capillary tube

Solenoid valve

SV

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3.2.5 Defrost Heating Oil Return OperationHigh temperature, high pressure gas




Four way valve

Check valve

FilterCheck valve

SV

Filter

ReceiverFilter


Filter

Filter

S1NPH FilterFilter


S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe

Check valve

Check valve



valve



Check valve

Solenoid valve

Capillary tube

Fusible plug

Pressure regulating

valve

Check valve

Check valve

Capillary tube


valve



Heat sink

Four way valve


Four way valve

Low pressure sensor


Suction gas pipe

Fusible plug

Capillary tube

Charge port

INV 2



Check valve


CompressorINV 1

Capillary tube

Solenoid valve

Check valve

Oil Separator

Capillary tube

Solenoid valve

SV

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3.2.6 Oil Return Operation at Simultaneous Cooling / Heating OperationHigh temperature, high pressure gas




Four way valve

Check valve

FilterCheck valve

SV

Filter

ReceiverFilter


Filter

Filter

S1NPH FilterFilter


S1NPL

SV

CompressorFilter

Accumulator


Liquid pipe

Check valve

Check valve



valve



Check valve

Solenoid valve

Capillary tube

Fusible plug

Pressure regulating

valve

Check valve

Check valve

Capillary tube


valve



Heat sink

Four way valve


Four way valve

Low pressure sensor


Suction gas pipe

Fusible plug

Capillary tube

Charge port

INV 2



Check valve


CompressorINV 1

Capillary tube

Solenoid valve

Check valve

Oil Separator

Capillary tube

Solenoid valve

SV

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SiUS341504E

Remote Controller 41

Part 3Remote Controller

1. Wired Remote Controller...........................................................................421.1 Applicable Models ...................................................................................... 421.2 Names and Functions ................................................................................ 421.3 MAIN/SUB Setting when Using 2 Remote Controllers ............................... 441.4 Centralized Control Group No. Setting....................................................... 45

2. Wireless Remote Controller ......................................................................472.1 Applicable Models ...................................................................................... 472.2 Names and Functions ................................................................................ 472.3 Address and MAIN/SUB Setting................................................................. 49

3. Service Mode ............................................................................................503.1 BRC1E73 ................................................................................................... 50

Wired Remote Controller SiUS341504E

1. Wired Remote Controller1.1 Applicable Models

1.2 Names and Functions1.2.1 BRC1E73

Functions other than basic operation items (i.e., On/Off, Operation Mode, Fan Speed, and Setpoint) are set from the menu screen.

NOTE Do not install the remote controller in places exposed to direct sunlight, the LCD will be damaged.Do not pull or twist the remote controller cord, the remote controller may be damaged.Do not use objects with sharp ends to press the buttons on the remote controller damage may result.

1. Operation mode selector buttonPress this button to select the operation mode of your preference.∗ Available modes vary with the indoor unit model.

2. Fan speed control buttonPress this button to select the fan speed of your preference. ∗ Available fan speeds vary with the indoor unit model.

FXFQ-TFXFQ-P FXZQ-M FXDQ-M FXMQ-PB

FXMQ-M FXHQ-M FXAQ-P FXUQ-P FXLQ-M FXNQ-M FXTQ-PA

BRC1E73 (Navigation Remote Controller)

3. Menu/OK button

8. On/Off button

10. Cancel button

9. Operation lamp

11. LCD (with backlight)

4. Up button5. Down button6. Right button7. Left button

1. Operation mode selector button

2. Fan speed control button

42 Remote Controller

SiUS341504E Wired Remote Controller

3. Menu/OK buttonUsed to enter the main menu.Used to enter the selected item.

4. Up button Used to raise the setpoint. The item above the current selection will be highlighted.(The highlighted items will be scrolled continuously when the button is continuously pressed.)Used to change the selected item.

5. Down button Used to lower the setpoint.The item below the current selection will be highlighted.(The highlighted items will be scrolled continuously when the button is continuously pressed.)Used to change the selected item.

6. Right button Used to highlight the next items on the right-hand side.Each screen is scrolled in the right-hand direction.

7. Left button Used to highlight the next items on the left-hand side.Each screen is scrolled in the left-hand direction.

8. On/Off button Press this button and system will start.Press this button again to stop the system.

9. Operation lampThis lamp illuminates solid green during normal operation.This lamp blinks if an error occurs.

10.Cancel button Used to return to the previous screen.

11.LCD (with backlight)The backlight will be illuminated for approximately 30 seconds by pressing any button.If two remote controllers are used to control a single indoor unit, only the controller accessed first will have backlight functionality.



1.3 MAIN/SUB Setting when Using 2 Remote ControllersSituation

The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB.

SettingThe remote controllers are factory setting to MAIN, so you only have to change one remote controller from MAIN to SUB. To change a remote controller from MAIN to SUB, proceed as follows:

1.3.1 BRC1E73The designation of the main and sub remote controllers can be swapped. Note that this change requires turning the power OFF and then ON again.

Service settings menu Item 2

Switch Main Sub Controller Main RCSub RC

Select "Switch Main Sub Controller" and press "Menu/OK" button.Service

settings menu is displayed.

Item 2 is displayed.

Basic screen is displayed.

Press and hold "Cancel" button for 4 seconds or more.

Press "Cancel" button once.

Press "Cancel" button.


Press "Menu/OK" button.

Select "Main RC" or "Sub RC" using the

" / (Up/Down)" buttons, and then press "Menu/OK" button.


SiUS341504E Wired Remote Controller

1.4 Centralized Control Group No. Setting1.4.1 BRC1E73

In order to conduct the centralized remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.Make Group No. settings for centralized remote control using the operating remote controller.

<When initializing Group Address>

Select "Group Address" and then press "Menu/OK" button.


Select "Group Address (Unit)" and then press "Menu/OK" button.


Service settings menu is displayed.







Select the desired Group Address using the " / (Up/Down)" buttons, and then press "Menu/OK" button.


Select the desired Unit No. using the " / (Up/Down)" buttons, and then select Group Address using the " " buttons.


0 1-00

Service settings menu Item 2 DescriptionThis menu is used to make group address setting for centralized control.It is also used to make group address setting by indoor unit.

Group Address Group Address (Group)

Group Address (Unit)



Note: For setting group No. of Energy recovery ventilator and wiring adaptor for other air conditioners, etc., refer to the instruction manual attached.

NOTICEEnter the group No. and installation place of the indoor unit into the attached installation table. Be sure to keep the installation table with the operation manual for maintenance.

<Group Address (Group)>

Select "Group Address" and then press "Menu/OK" button.

Select "Group Address (Group)" and then press "Menu/OK" button.


Select the desired Group Address using the " / (Up/Down)" buttons, and then press "Menu/OK" button.











SiUS341504E Wireless Remote Controller

2. Wireless Remote Controller2.1 Applicable Models

2.2 Names and Functions

3P107422-11J

FXFQ-TFXFQ-P FXZQ-M FXDQ-M FXMQ-PB

FXMQ-M FXHQ-M FXAQ-P FXUQ-P FXLQ-M FXNQ-M FXTQ-PA

BRC7C812 — BRC4C82 BRC7E83 BRC7E818 —

1-1

1-28

10

13

11

12

15

14

16

17

9

1

3

4

6

2

5

7


Wireless Remote Controller SiUS341504E

C: 3P107422-11J

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

DISPLAY “ ” (SIGNAL TRANSMISSION)

This lights up when a signal is being transmitted.

This display shows the current OPERATION MODE. For cooling only type, “ ” (Auto) and “ ” (Heating) are not installed.

DISPLAY “ ” (SET TEMPERATURE)

This display shows the set temperature.

DISPLAY “ ” (PROGRAMMED TIME)

This display shows PROGRAMMED TIME of the system start or stop.

DISPLAY “ ” (AIRFLOW FLAP)

DISPLAY “ ” “ ” (FAN SPEED)

The display shows the set fan speed.

DISPLAY “ TEST ” (INSPECTION/ TEST OPERATION)When the INSPECTION/TEST OPERATION BUTTON is pressed, the display shows the system mode is in.

ON/OFF BUTTON

Press the button and the system will start. Press the button again and the system will stop.

FAN SPEED CONTROL BUTTON

Press this button to select the fan speed, HIGH or LOW, of your choice.

TEMPERATURE SETTING BUTTONUse this button for SETTING TEMPERATURE (Operates with the front cover of the remote controller closed.)

PROGRAMMING TIMER BUTTONUse this button for programming “START and/or STOP” time. (Operates with the front cover of the remote controller opened.)

TIMER MODE START/STOP BUTTONTIMER RESERVE/CANCEL BUTTON

AIRFLOW DIRECTION ADJUST BUTTON

OPERATION MODE SELECTOR BUTTON

Press this button to select OPERATION MODE.

FILTER SIGN RESET BUTTON

Refer to the section of MAINTENANCE in the operation manual attached to the indoor unit.

INSPECTION/TEST OPERATION BUTTON

This button is used only by qualified service persons for maintenance purposes.

EMERGENCY OPERATION SWITCH

This switch is readily used if the remote controller does not work.

RECEIVERThis receives the signals from the remote controller.

OPERATING INDICATOR LAMP (Red)This lamp stays lit while the air conditioner runs. It blinks when the unit is in trouble.

TIMER INDICATOR LAMP (Green)This lamp stays lit while the timer is set.

AIR FILTER CLEANING TIME INDICATOR LAMP (Red)

Lights up when it is time to clean the air filter.

DEFROST LAMP (Orange)

Lights up when the defrosting operation has started. (For cooling only type this lamp does not turn ON.)

NOTES• For the sake of explanation, all indications are

shown on the display in Figure 1 contrary to actual running situations.

• Fig. 1-2 shows the remote controller with the front cover opened.

• If the air filter cleaning time indicator lamp lights up, clean the air filter as explained in the operation manual provided with the indoor unit.After cleaning and reinstalling the air filter, press the filter sign reset button on the remote controller. The air filter cleaning time indicator lamp on the receiver will go out.

• The Defrost Lamp will blink when the power is turned ON. This is not an error.

DISPLAY “ ” “ ” “ ” “ ”

“ ” (OPERATION MODE)


SiUS341504E Wireless Remote Controller

2.3 Address and MAIN/SUB SettingIntroduction

To set the wireless remote controller, you have to set the address for:The receiver of the wireless remote controllerThe wireless remote controller.

Setting the Address for the ReceiverThe address for the receiver of the wireless remote controller is factory setting to 1. To change this setting, proceed as follows:Set the wireless address switch (SS2) on the PCB according to the table below.

When using both a wired and a wireless remote controller for 1 indoor unit, the wired controller should be set to MAIN. Therefore, set the MAIN/SUB switch (SS1) of the receiver to SUB.

Setting the Address for the Wireless Remote ControllerThe address for the wireless remote controller is factory setting to 1. To change this setting, proceed as follows:

1. Hold down the “ ” button and the

“ ” button for at least 4 seconds to get

the Field setting mode.(Indicated in the display area in the figure at right.)

2. Press the “ ” button and select a multiple

setting (A/b). Each time the button is pressed the

display switches between “A” and “b”.

3. Press the “ ” button or “ ” button to set the address.

Address can be set from 1 to 6, but set it to 1 ~ 3 and to same address as the receiver. (The receiver does not work with address 4 ~ 6.)

4. Press the “ ” button to enter the setting.

5. Hold down the “ ” button for at least 1

second to quit the Field setting mode and return to

the normal display.

Unit No. No. 1 No. 2 No. 3

Wireless address switch (SS2)

MAIN/SUB MAIN SUB

MAIN/SUB switch (SS1)

1 2 3

1 2 3

1 2 3

S

M

S

M

Mode 3

2

4

1

Address

5

Multiple setting1 2 3 4 5 6


Service Mode SiUS341504E

3. Service Mode3.1 BRC1E73

Operating the remote controller allows service data to be acquired and various services to be set.

Maintenance Menu Item 2 Remarks2.1 Model Name 1.Unit No. Select the Unit No. you want to check.

2. Indoor unit3.Outdoor unit

2.2 Operation Hours 1.Unit No. Select the Unit No. you want to check.2. Indoor unit operating

timeAll of these are displayed in hours.

3. Indoor fan operation4. Indoor unit energized

time5.Outdoor unit operating

time6.Outdoor unit fan 1

operation7.Outdoor unit fan 2

operation8.Outdoor comp. 1

operation9.Outdoor comp. 2

operation2.3 Indoor Unit Status 1.Unit No. Select the Unit No. you want to check.

2.FAN Fan tap3.FLAP Swing, fixed4.Speed Fan speed (rpm)5.EV Degree that electronic expansion valve is open (pulse)6.MP Drain pump ON/OFF7.EH Electric heater ON/OFF8.Hu Humidifier ON/OFF9.TBF Anti-freezing control ON/OFF







Select the desired item from the Maintenance menu, and then press "Menu/OK" button.Maintenance

menu is displayed.



Select the desired Unit No. using the " / (Up/Down)" buttons. The corresponding data will be displayed.


SiUS341504E Service Mode

2.3 Indoor Unit Status 10.FLOAT11.T1/T212.Unit No. Select the Unit No. you want to check.

SkyAir VRV13.Th1 Suction air thermistor Suction air thermistor14.Th2 Heat exchanger

thermistorHeat exchanger liquid

pipe thermistor15.Th3 — Heat exchanger gas

pipe thermistor16.Th4 Discharge air thermistor Discharge air thermistor17.Th5 — —18.Th6 — —

2.4 Outdoor Unit Status 1.Unit No. Select the Unit No. you want to check.2.FAN step Fan tap3.COMP Compressor power supply frequency (Hz)4.EV1 Degree that electronic expansion valve is open

(pulse)5.SV1 Solenoid valve ON/OFF

SkyAir VRV6.Th1 Outdoor air thermistor —7.Th2 Heat exchanger

thermistor—

8.Th3 Discharge pipe thermistor

—

9.Th4 Heat exchanger deicer thermistor

—

10.Th5 Heat exchanger gas pipe thermistor

—

11.Th6 Liquid pipe thermistor —2.5 Forced Defrost

(SkyAir only)1.Forced defrost ON Enables the forced defrost operation.2.Forced defrost OFF Disables the forced defrost operation.

2.6 Error Display 1.Display Error ON Displays the error on the screen.2.Display Error OFF Displays neither errors nor warnings.3.Display Warning ON Displays a warning on the screen if an error

occurs.4.Display Warning OFF No warning is displayed.

2.7 Swap Unit No. 1.Current Unit No. A unit No. can be transferred to another.2.Transfer Unit No.

2.8 Addressed Sensor Value

Unit No.: 0 - 15 Select the Unit No. you want to check. Code

00:01:02:03:04:05:06:07:08:09:

Remote controller thermistor (°F)Suction air thermistor (°F)Heat exchanger liquid pipe thermistor (°F)Heat exchanger gas pipe thermistor (°F)Indoor unit address No.Outdoor unit address No.Branch selector unit address No.Zone control address No.Cooling/Heating batch address No.Demand/low-noise address No.

Data The corresponding data will be displayed, based on the Unit No. and Code selected.

Maintenance Menu Item 2 Remarks


SiUS341504E

52 Function and Control

Part 4Function and Control

1. Function General.......................................................................................531.1 Operation Mode.......................................................................................... 531.2 Stop Control ............................................................................................... 541.3 Standby Control.......................................................................................... 541.4 Startup Control ........................................................................................... 55

2. Basic Control.............................................................................................572.1 List of Functions in Normal Operation ........................................................ 572.2 Compressor PI Control............................................................................... 582.3 Operating Priority and Rotation of Compressors........................................ 582.4 Compressor Step Control........................................................................... 602.5 Electronic Expansion Valve PI Control....................................................... 632.6 Step Control of Outdoor Unit Fans ............................................................. 642.7 Heat Exchanger Control ............................................................................. 66

3. Protection Control .....................................................................................673.1 High Pressure Protection Control............................................................... 673.2 Low Pressure Protection Control................................................................ 693.3 Discharge Pipe Protection Control ............................................................. 703.4 Inverter Protection Control ......................................................................... 71

4. Special Control..........................................................................................724.1 Pump down Residual Operation................................................................. 724.2 Oil Return Operation .................................................................................. 734.3 Defrost Operation ....................................................................................... 754.4 Cooling / Heating Mode Switching ............................................................. 76

5. Other Control.............................................................................................805.1 Backup Operation....................................................................................... 805.2 Demand Operation ..................................................................................... 805.3 Heating Operation Prohibition .................................................................... 80

6. Outline of Control (Indoor Unit) .................................................................816.1 Operation Flow Chart ................................................................................. 816.2 Thermostat Control..................................................................................... 836.3 Drain Pump Control.................................................................................... 856.4 Control of Electronic Expansion Valve ....................................................... 876.5 Freeze-up Prevention................................................................................. 886.6 Heater Control (Optional PCB KRP1B ... is required.) ............................... 896.7 List of Swing Flap Operations .................................................................... 906.8 Hot Start Control (In Heating Only) ............................................................ 916.9 Louver Control for Preventing Ceiling Dirt.................................................. 926.10 Heater Control (FXTQ) ............................................................................... 936.11 4 Step Thermostat Processing (FXTQ) ...................................................... 956.12 Interlocked with External Equipment (FXTQ) ............................................. 96

SiUS341504E Function General

1. Function General1.1 Operation ModeOperation flow chart

For detailed description of each function in the flow below, refer to the details on related function on the following pages.

Note: 1. In the event indoor unit stops or the thermostat turns OFF while in oil return operation or defrosting operation, pump down residual operation is performed on completion of the oil return operation or defrosting operation.

2. Not performed during cooling mode.

1.1 Stop control(1) Stop due to error(2) When system is in stop mode(3) Slave unit stops during master unit operation

1.2 Standby control(1) Restart standby(2) Crankcase heater control

1.3 Startup control(include pressure equalization before startup)(1) Startup control in cooling(2) Startup control in heating

1.4 Basic control(1) List of Functions in Normal Operation(2) Compressor PI control(3) Operation priority and rotation of

compressors(4) Compressor step control(5) Electronic expansion valve PI control(6) Step control of outdoor unit fans(7) Heat exchanger control

1.5 Protection control(1) High pressure protection control(2) Low pressure protection control(3) Discharge pipe protection control(4) Compressor body protection control(5) Inverter protection control

Thermo. ON

Thermo. ON

End of startupcontrol A

bnor

mal

ity

The

rmo.

OF

F

Conditions met for oil return

1.6 Special control

(1) Pump down residual operation (note 2)

(2) Outdoor unit rotation

Thermo. OFF

(3) Oil return operation (note 1)

Conditions met for defrosting(4) Defrost operation (note1)

Function and Control 53

Function General SiUS341504E

1.2 Stop Control1.2.1 Stop due to Error

In order to protect compressors, if any of the abnormal state occurs, the system will make "stop with thermostat OFF" and the error will be determined according to the number of retry times.(Refer to "Error code and Description" (P.152~) of the troubleshooting for the items to determine the error.)

1.2.2 When System is in Stop ModeThe four way valves both for heat exchanger switch and piping switch retain the condition before they were stopped.

1.2.3 Slave Unit Stops during Master Unit OperationWhen slave unit is stopped (because of low demand), conditions for this unit are set same as above “1.2.2. When System is in Stop Mode” till this unit is required to operate (increase of load).

1.3 Standby Control1.3.1 Restart Standby

Used to forcedly stop the compressor for a period of 5 minutes, in order to prevent the frequent ON/OFF of the compressor and equalize the pressure within the refrigerant system.In addition, the outdoor unit fan carry out the residual operation for a while to suppress the acceleration of the pressure equalizing and melting of the refrigerant to the evaporator.

1.3.2 Crankcase Heater ControlIn order to prevent the refrigerant from melting in the compressor oil in the stopped mode, this mode is used to control the crankcase heater.

Crankcase heaterOFF

Crankcase heaterON

Discharge pipetemperature < 70˚C (158˚F)

Discharge pipetemperature > 75˚C (167˚F)


SiUS341504E Function General

1.4 Startup ControlThis control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.To avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four way valve is also determined. Start both the master and the slave units simultaneously to position the four way valve.

1.4.1 Startup Control in Cooling

0 Hz

0 Hz

0 pulse

3,000 pulse (fully open)

Step4

Pc – Pe > 0.78 MPa (261 ftH2O)Pc – Pe > 0.39 MPa (130 ftH2O)164 Hz or more

OR &

Ta < 20˚C: OFF(68˚F)

Ta ≥ 20˚C: Step4(68˚F)

Frequency step up 5 sec. interval

+1step/15 sec. (Pc > 2.16 MPa (723 ftH2O))–1step/15 sec. (Pc < 1.77 MPa (592 ftH2O))

INV compressor 1 (M1C)


Electronic expansion valve (main)(Y1E)

Inverter fanM1F: REYQ72TM1F + M2F: REYQ96-168T

∗ only REYQ96-168T

Pc – Pe > 0.17 MPa (57 ftH2O)

A

BC

D

EREYQ96-168T

52 Hz74 Hz90 Hz

120 Hz164 Hz

REYQ72T60 Hz75 Hz90 Hz

120 Hz180 Hz

ABCDE


Function General SiUS341504E

1.4.2 Startup Control in Heating

REYQ72T60 Hz75 Hz90 Hz

120 Hz180 Hz

0 Hz

0 Hz

+12 Hz/20 sec.

+12 Hz/20 sec.

A

B

C

DE

A

0 pulse

Step4

Step8

OR &

T(Ta–Te)control

A



Electronic expansion valve (main)(Y1E)

Inverter fanM1F: REYQ72TM1F + M2F: REYQ96-168T

∗ only REYQ96-168T

Frequency step up 5 sec. interval

Initial opening

REYQ96-168T52 Hz74 Hz90 Hz

120 Hz164 Hz

ABCDE

Pc – Pe > 0.78 MPa (261 ftH2O)Pc – Pe > 0.39 MPa (130 ftH2O)164 Hz or more

Pc – Pe > 0.17 MPa (57 ftH2O)


SiUS341504E Basic Control

2. Basic Control2.1 List of Functions in Normal Operation

Part Name

Electric Symbol Function of Functional Part

REYQ72T REYQ96-168T Normal Cooling Normal Heating

Normal Simultaneous

Cooling / Heating

Inverter compressor M1C M1C, M2C

PI control, High pressure protection, Low pressure protection, Td protection, Inverter protection,



Inverter fan M1F M1F, M2F Cooling fan control

Outdoor unit heat exchanger: Condenser /Cooling fan control Outdoor unit heat exchanger: Evaporator / Fan step 7 or 8

Outdoor unit heat exchanger: Condenser /Cooling fan control Outdoor unit heat exchanger: Evaporator / Fan step 7 or 8

Electronic expansion valve (Heat exchanger upper) Y1E Y1E Subcooled degree

control

Superheated degree control (Subcooled degree control in low load)

Subcooled degree control (when HE is evaporator)Superheated degree control (when HE is condensor)

Electronic expansion valve (Heat exchanger lower) Y3E Y3E

Subcooled degree control (0 pulse in low load)

Superheated degree control (0 pulse in low load)

Electronic expansion valve (Subcooling heat exchanger)

Y2E Y2ESuperheated degree control (discharge pipe protection)

Superheated degree control (discharge pipe protection)

Superheated degree control (discharge pipe protection)

Electronic expansion valve (Receiver gas purge) Y4E Y4E 0 pulse Gas purge control Gas purge control

Electronic expansion valve (Inverter cooling) Y5E Y5E Cooling refrigerant

controlCooling refrigerant control

Cooling refrigerant control

Solenoid valve (Oil separator oil return) Y1S Y1S, Y2S ON ON ON

Solenoid valve (Liquid pipe) Y3S Y3S ON ON ONFour way valve (HP/LP gas pipe) Y4S Y4S ON OFF OFF

Four way valve (Heat exchanger lower) Y5S Y5S OFF (ON in low load) ON OFF (in cooling)

OFF (In heating)Four way valve (Heat exchanger upper) Y6S Y6S OFF ON (OFF in low load) OFF (in cooling)

OFF (In heating)

Branch selector unit actuatorNormal cooling Normal Simultaneous Cooling /

Heating Normal heating

Cooling Cooling Heating Heating


(EVSC)Y1E

Thermo. ON 0 pulse 0 pulse Subcooled degree control 0 pulse

Stopping 0 pulse 0 pulse 0 pulse 0 pulse

Thermo. OFF 0 pulse 0 pulse 0 pulse 0 pulse


(EVH)Y2E

Thermo. ON 6,000 pulse 0 pulse 6,000 pulse 6,000 pulseStopping 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse

Thermo. OFF 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse


(EVL)Y3E

Thermo. ON 6,000 pulse 6,000 pulse 0 pulse 0 pulseStopping 6,000 pulse 6,000 pulse 0 pulse 0 pulse

Thermo. OFF 6,000 pulse 6,000 pulse 0 pulse 0 pulse


Basic Control SiUS341504E

2.2 Compressor PI ControlCarries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance.On multi-outdoor-unit systems, this control is made according to values of the first-priority unit, which is detected with the pressure sensor.

[Cooling operation]

[Heating operation]

2.3 Operating Priority and Rotation of Compressors Each compressor operates in the following order of priority.In the case of multi-outdoor-unit system, each compressor operates in any of Pattern 1 through Pattern 3 according to the rotation of outdoor units.

INV: Inverter compressorINV 1: Inverter compressor 1INV 2: Inverter compressor 2

[Single Outdoor Unit]

Controls compressor capacity to adjust Te to achieve target value (TeS).

Te: Low pressure equivalent saturation temperature TeS: Target temperature of Te

(Varies depending on Te setting, operating frequency, etc.)Te set value (Make this setting while in Setting

mode 2.)

Te setting

L M (Normal)(factory setting)

H

3°C(37.4°F)

6°C(42.8°F)

7°C(44.6°F)

8°C(46.4°F)

9°C(48.2°F)

10°C(50°F)

11°C(51.8°F)

Controls compressor capacity to adjust Tc to achieve target value (TcS).

Tc: High pressure equivalent saturation temperatureTcS: Target temperature of Tc

(Varies depending on Tc setting, operating frequency, etc.)Te set value (Make this setting while in Setting

mode 2.)

Tc setting

L M (Normal) :factory setting

H

43°C(109.4°F)

46°C(114.8°F)

48°C(118.4°F)

Pattern 1 Pattern 2 Pattern 3

Standard type: REYQ72T

INV

No. 1

INV1 INV2

No. 1 No. 2

Standard type: REYQ96-168T



[2 Outdoor Units]

[3 Outdoor Units]

Note: 1. In the case of combination of 3 outdoor units, the above diagram shows master unit, slave unit 1, and slave unit 2 from left to right.

2. Compressors may operate in any pattern other than those mentioned above according to the operating status.

No. 1 No. 2 No. 4No. 2 No. 1 No. 3

No. 3No. 4

INV1 INV2 INV1 INV2INV INV1 INV2

No. 1 No. 2 No. 3No. 2 No. 1 No. 3

Standard type: REYQ192T Standard type: REYQ216-336T

No. 1 No. 4No. 3 No. 6No. 2 No. 5

INV1 INV2INV1 INV2 INV1 INV2

No. 3 No. 6No. 2 No. 5No. 1 No. 4

No. 2 No. 5No. 1 No. 4No. 3 No. 6

Standard type: REYQ360-456T



2.4 Compressor Step ControlCompressor operations vary with the following steps according to information in "2.2 Compressor PI Control".Furthermore, the operating priority of compressors is subject to information in " Operating Priority and Rotation of Compressors".

Single unit installation

Note:1. Depending on the operating conditions of compressors, the compressors may run in patterns other

than those aforementioned.

REYQ72TStep No. INV (Hz) Step No. INV (Hz) Step No. INV (Hz)

1 60.0 61 127.8 121 269.72 60.9 62 129.3 122 273.03 61.8 63 130.8 123 276.34 62.7 64 132.3 124 279.95 63.6 65 134.1 125 283.56 64.5 66 135.9 126 287.17 65.4 67 137.7 127 290.78 66.3 68 139.5 128 294.39 67.2 69 141.3 129 309.310 68.1 70 143.1 130 313.211 69.0 71 144.9 131 321.012 69.9 72 146.7 132 324.913 70.8 73 148.5 133 329.114 71.7 74 150.3 134 333.315 72.6 75 152.1 135 337.516 73.5 76 153.9 136 341.717 74.4 77 155.7 137 345.918 75.3 78 157.8 138 350.419 76.2 79 159.9 139 354.920 77.1 80 162.0 140 359.421 78.0 81 164.1 141 363.922 78.9 82 166.2 142 368.423 79.8 83 168.3 143 372.924 80.7 84 170.4 144 377.725 81.6 85 172.5 145 382.526 82.5 86 174.6 146 387.327 83.4 87 176.7 147 392.128 84.3 88 178.829 85.5 89 180.930 86.7 90 183.331 87.9 91 185.732 89.1 92 188.133 90.3 93 190.534 91.5 94 192.935 92.7 95 195.336 93.9 96 197.737 95.1 97 200.138 96.3 98 202.539 97.5 99 204.940 98.7 100 207.641 99.9 101 210.342 101.1 102 213.043 102.3 103 215.744 103.5 104 218.445 104.7 105 221.146 105.9 106 223.847 107.1 107 226.548 108.3 108 229.249 109.8 109 232.250 111.3 110 235.251 112.8 111 238.252 114.3 112 241.253 115.8 113 244.254 117.3 114 247.255 118.8 115 250.256 120.3 116 253.257 121.8 117 256.558 123.3 118 259.859 124.8 119 263.160 126.3 120 266.4

REYQ72T upper limit



Note:1. Depending on the operating conditions of compressors, the compressors may run in patterns other than those

aforementioned.

REYQ96/120TStep No.

Step up (Hz) Step down (Hz) Step No.


Step up (Hz) Step down (Hz)INV1 INV2 INV1 INV2 INV1 INV2 INV1 INV2 INV1 INV2 INV1 INV2

1 52.0 0.0 52.0 0.0 64 120.8 0.0 56.4 64.4 127 154.4 164.4 154.4 164.42 52.8 0.0 52.8 0.0 65 122.4 0.0 56.6 66.0 128 156.6 166.6 156.6 166.63 53.4 0.0 53.4 0.0 66 124.0 0.0 57.0 67.0 129 158.8 168.8 158.8 168.84 54.2 0.0 54.2 0.0 67 125.8 0.0 58.0 68.0 130 161.2 171.2 161.2 171.25 54.8 0.0 54.8 0.0 68 127.4 0.0 58.8 68.8 131 163.4 173.4 163.4 173.46 55.6 0.0 55.6 0.0 69 129.2 0.0 59.6 69.6 132 165.8 175.8 165.8 175.87 56.4 0.0 56.4 0.0 70 130.8 0.0 60.4 70.4 133 168.2 178.2 168.2 178.28 57.2 0.0 57.2 0.0 71 61.4 71.4 61.4 71.4 134 170.6 180.6 170.6 180.69 57.8 0.0 57.8 0.0 72 65.0 75.0 65.0 75.0 135 173.2 183.2 173.2 183.210 58.6 0.0 58.6 0.0 73 66.0 76.0 66.0 76.0 136 175.6 185.6 175.6 185.611 59.4 0.0 59.4 0.0 74 67.0 77.0 67.0 77.0 137 180.6 190.6 180.6 190.612 60.2 0.0 60.2 0.0 75 67.8 77.8 67.8 77.8 138 183.2 193.2 183.2 193.213 61.0 0.0 61.0 0.0 76 68.8 78.8 68.8 78.8 139 192.0 202.0 192.0 202.014 61.8 0.0 61.8 0.0 77 69.8 79.8 69.8 79.8 140 195.4 205.4 195.4 205.415 62.8 0.0 62.8 0.0 78 70.8 80.8 70.8 80.8 141 199.0 209.0 199.0 209.016 63.6 0.0 63.6 0.0 79 71.8 81.8 71.8 81.8 142 201.6 213.6 201.6 213.617 64.4 0.0 64.4 0.0 80 73.0 83.0 73.0 83.0 143 205.4 217.4 205.4 217.418 65.2 0.0 65.2 0.0 81 74.0 84.0 74.0 84.0 144 207.2 223.2 207.2 223.219 66.2 0.0 66.2 0.0 82 75.0 85.0 75.0 85.0 145 211.0 227.0 211.0 227.020 67.0 0.0 67.0 0.0 83 76.2 86.2 76.2 86.2 146 215.0 231.0 215.0 231.021 68.0 0.0 68.0 0.0 84 77.2 87.2 77.2 87.2 147 218.8 234.8 218.8 234.822 68.8 0.0 68.8 0.0 85 78.4 88.4 78.4 88.4 148 223.0 239.0 223.0 239.023 69.8 0.0 69.8 0.0 86 79.4 89.4 79.4 89.4 149 227.0 243.0 227.0 243.024 70.8 0.0 70.8 0.0 87 80.6 90.6 80.6 90.6 150 229.2 249.2 229.2 249.225 71.6 0.0 71.6 0.0 88 81.8 91.8 81.8 91.8 151 233.6 253.6 233.6 253.626 72.6 0.0 72.6 0.0 89 82.8 92.8 82.8 92.8 152 237.8 257.8 237.8 257.827 73.6 0.0 73.6 0.0 90 84.0 94.0 84.0 94.0 153 242.2 262.2 242.2 262.228 74.6 0.0 74.6 0.0 91 85.2 95.2 85.2 95.2 154 246.8 266.8 246.8 266.829 75.6 0.0 75.6 0.0 92 86.4 96.4 86.4 96.4 155 251.4 271.4 251.4 271.430 76.6 0.0 76.6 0.0 93 87.8 97.8 87.8 97.8 156 256.0 276.0 256.0 276.031 77.6 0.0 77.6 0.0 94 90.2 100.2 90.2 100.232 78.8 0.0 78.8 0.0 95 91.6 101.6 91.6 101.633 79.8 0.0 79.8 0.0 96 92.8 102.8 92.8 102.834 80.8 0.0 80.8 0.0 97 94.2 104.2 94.2 104.235 82.0 0.0 82.0 0.0 98 95.4 105.4 95.4 105.436 83.0 0.0 83.0 0.0 99 96.8 106.8 96.8 106.837 84.2 0.0 84.2 0.0 100 98.2 108.2 98.2 108.238 85.4 0.0 85.4 0.0 101 99.6 109.6 99.6 109.639 86.4 0.0 86.4 0.0 102 101.0 111.0 101.0 111.040 87.6 0.0 87.6 0.0 103 102.6 112.6 102.6 112.641 88.8 0.0 88.8 0.0 104 104.0 114.0 104.0 114.042 90.0 0.0 90.0 0.0 105 105.4 115.4 105.4 115.443 91.2 0.0 91.2 0.0 106 106.8 116.8 106.8 116.844 92.4 0.0 92.4 0.0 107 108.4 118.4 108.4 118.445 93.6 0.0 93.6 0.0 108 109.8 119.8 109.8 119.846 95.0 0.0 95.0 0.0 109 111.4 121.4 111.4 121.447 96.2 0.0 96.2 0.0 110 113.0 123.0 113.0 123.048 97.6 0.0 97.6 0.0 111 114.6 124.6 114.6 124.649 98.8 0.0 98.8 0.0 112 116.2 126.2 116.2 126.250 100.2 0.0 100.2 0.0 113 118.0 128.0 118.0 128.051 101.6 0.0 101.6 0.0 114 119.6 129.6 119.6 129.652 103.0 0.0 52.0 52.0 115 121.2 131.2 121.2 131.253 104.2 0.0 52.0 53.0 116 122.8 132.8 122.8 132.854 105.6 0.0 52.0 54.0 117 130.0 140.0 130.0 140.055 107.0 0.0 52.6 54.6 118 131.8 141.8 131.8 141.856 108.6 0.0 52.8 56.0 119 133.8 143.8 133.8 143.857 110.0 0.0 53.0 57.0 120 139.6 149.6 139.6 149.658 111.4 0.0 53.8 57.8 121 141.6 151.6 141.6 151.659 113.0 0.0 54.0 59.4 122 143.6 153.6 143.6 153.660 114.6 0.0 54.4 60.4 123 145.8 155.8 145.8 155.861 116.0 0.0 55.0 61.0 124 147.8 157.8 147.8 157.862 117.6 0.0 55.2 62.6 125 150.0 160.0 150.0 160.063 119.2 0.0 55.6 63.6 126 152.2 162.2 152.2 162.2

REYQ96T upper limit

REYQ120T upper limit



Note:1. Depending on the operating conditions of compressors, the compressors may run in patterns other than those

aforementioned.

REYQ144TStep No.



Step up (Hz) Step down (Hz)INV1 INV2 INV1 INV2 INV1 INV2 INV1 INV2 INV1 INV2 INV1 INV2

1 52.0 0.0 52.0 0.0 61 116.0 0.0 54.2 61.8 121 132.8 140.7 132.8 140.72 52.8 0.0 52.8 0.0 62 117.6 0.0 55.0 62.7 122 140.4 148.8 140.4 148.83 53.4 0.0 53.4 0.0 63 119.2 0.0 55.8 63.3 123 142.4 150.6 142.4 150.64 54.2 0.0 54.2 0.0 64 120.8 0.0 56.6 64.2 124 144.4 152.7 144.4 152.75 54.8 0.0 54.8 0.0 65 122.4 0.0 57.4 65.1 125 146.4 154.8 146.4 154.86 55.6 0.0 55.6 0.0 66 124.0 0.0 58.2 65.7 126 148.6 156.9 148.6 156.97 56.4 0.0 56.4 0.0 67 125.8 0.0 59.0 66.9 127 150.6 159.3 150.6 159.38 57.2 0.0 57.2 0.0 68 127.4 0.0 59.8 67.5 128 152.8 161.4 152.8 161.49 57.8 0.0 57.8 0.0 69 129.2 0.0 60.6 68.4 129 155.0 163.8 155.0 163.810 58.6 0.0 58.6 0.0 70 130.8 0.0 61.6 69.3 130 157.2 166.2 157.2 166.211 59.4 0.0 59.4 0.0 71 132.6 0.0 62.4 70.2 131 159.4 168.3 159.4 168.312 60.2 0.0 60.2 0.0 72 140.0 0.0 66.0 74.1 132 161.6 170.7 161.6 170.713 61.0 0.0 61.0 0.0 73 141.8 0.0 66.8 75.0 133 163.8 172.8 163.8 172.814 61.8 0.0 61.8 0.0 74 143.8 0.0 67.8 75.9 134 166.2 175.5 166.2 175.515 62.8 0.0 62.8 0.0 75 68.8 76.8 68.8 76.8 135 168.6 177.9 168.6 177.916 63.6 0.0 63.6 0.0 76 69.8 77.7 69.8 77.7 136 170.8 180.3 170.8 180.317 64.4 0.0 64.4 0.0 77 70.8 78.9 70.8 78.9 137 173.2 183.0 173.2 183.018 65.2 0.0 65.2 0.0 78 71.8 79.8 71.8 79.8 138 175.8 185.4 175.8 185.419 66.2 0.0 66.2 0.0 79 72.8 80.7 72.8 80.7 139 178.2 188.1 178.2 188.120 67.0 0.0 67.0 0.0 80 73.8 81.9 73.8 81.9 140 180.8 190.5 180.8 190.521 68.0 0.0 68.0 0.0 81 74.8 83.1 74.8 83.1 141 183.2 193.2 183.2 193.222 68.8 0.0 68.8 0.0 82 75.8 84.0 75.8 84.0 142 185.8 195.9 185.8 195.923 69.8 0.0 69.8 0.0 83 77.0 85.2 77.0 85.2 143 191.2 202.8 191.2 202.824 70.8 0.0 70.8 0.0 84 78.0 86.4 78.0 86.4 144 193.8 207.3 193.8 207.325 71.6 0.0 71.6 0.0 85 79.2 87.6 79.2 87.6 145 196.6 211.5 196.6 211.526 72.6 0.0 72.6 0.0 86 80.2 88.5 80.2 88.5 146 199.4 216.0 199.4 216.027 73.6 0.0 73.6 0.0 87 81.4 89.7 81.4 89.7 147 202.2 220.8 202.2 220.828 74.6 0.0 74.6 0.0 88 82.6 90.9 82.6 90.9 148 205.0 225.3 205.0 225.329 75.6 0.0 75.6 0.0 89 83.6 91.8 83.6 91.8 149 207.8 230.1 207.8 230.130 76.6 0.0 76.6 0.0 90 84.8 93.0 84.8 93.0 150 210.8 234.9 210.8 234.931 77.6 0.0 77.6 0.0 91 86.0 94.2 86.0 94.2 151 213.8 240.0 213.8 240.032 78.8 0.0 78.8 0.0 92 87.2 95.4 87.2 95.4 152 216.8 245.1 216.8 245.133 79.8 0.0 79.8 0.0 93 88.6 96.9 88.6 96.9 153 219.8 250.2 219.8 250.234 80.8 0.0 80.8 0.0 94 91.0 99.3 91.0 99.3 154 223.0 255.6 223.0 255.635 82.0 0.0 82.0 0.0 95 92.4 100.8 92.4 100.8 155 226.0 261.0 226.0 261.036 83.0 0.0 83.0 0.0 96 93.6 102.0 93.6 102.0 156 229.2 266.4 229.2 266.437 84.2 0.0 84.2 0.0 97 95.0 103.2 95.0 103.2 157 232.4 272.1 232.4 272.138 85.4 0.0 85.4 0.0 98 96.2 104.4 96.2 104.4 158 235.8 277.8 235.8 277.839 86.4 0.0 86.4 0.0 99 97.6 105.9 97.6 105.9 159 239.0 283.5 239.0 283.540 87.6 0.0 87.6 0.0 100 99.0 107.1 99.0 107.1 160 242.4 289.5 242.4 289.541 88.8 0.0 88.8 0.0 101 100.4 108.6 100.4 108.6 161 245.8 292.8 245.8 292.842 90.0 0.0 90.0 0.0 102 101.8 110.1 101.8 110.1 162 249.4 296.4 249.4 296.443 91.2 0.0 91.2 0.0 103 103.2 111.9 103.2 111.9 163 252.8 299.7 252.8 299.744 92.4 0.0 92.4 0.0 104 104.6 113.1 104.6 113.1 164 256.4 303.0 256.4 303.045 93.6 0.0 93.6 0.0 105 106.2 114.3 106.2 114.3 165 260.0 306.6 260.0 306.646 95.0 0.0 95.0 0.0 106 107.6 115.8 107.6 115.8 166 263.8 310.2 263.8 310.247 96.2 0.0 96.2 0.0 107 109.2 117.3 109.2 117.3 167 267.4 313.8 267.4 313.848 97.6 0.0 97.6 0.0 108 110.8 118.8 110.8 118.8 168 275.0 321.0 275.0 321.049 98.8 0.0 98.8 0.0 109 112.2 120.3 112.2 120.3 169 275.0 328.8 275.0 328.850 100.2 0.0 100.2 0.0 110 113.8 121.8 113.8 121.8 170 275.0 352.5 275.0 352.551 101.6 0.0 101.6 0.0 111 115.4 123.6 115.4 123.652 103.0 0.0 103.0 0.0 112 117.2 125.4 117.2 125.453 104.2 0.0 104.2 0.0 113 118.8 127.2 118.8 127.254 105.6 0.0 105.6 0.0 114 120.4 128.7 120.4 128.755 107.0 0.0 107.0 0.0 115 122.2 130.2 122.2 130.256 108.6 0.0 108.6 0.0 116 123.8 131.7 123.8 131.757 110.0 0.0 110.0 0.0 117 125.6 133.5 125.6 133.558 111.4 0.0 52.0 60.0 118 127.4 135.0 127.4 135.059 113.0 0.0 52.8 60.3 119 129.2 136.8 129.2 136.860 114.6 0.0 53.4 61.2 120 131.0 138.9 131.0 138.9

REYQ144T upper limit



2.5 Electronic Expansion Valve PI ControlMain electronic expansion valve EVM control

When the outdoor unit heat exchanging is performed via the evaporator (20SA is set to ON), this function is used to exert PI control on the electronic expansion valve (Y1E or Y3E) so that the evaporator outlet superheated degree (SH) will become constant.

Subcooling electronic expansion valve EVT controlIn order to make the maximum use of the subcooling heat exchanger, this function is used to exert PI control on the electronic expansion valve (Y2E, Y5E or Y3E) so that the evaporator-side gas pipe superheated degree (SH) will become constant.

Refrigerant charge electronic expansion valve EVJ controlWhile in automatic refrigerant charge mode, this function is used to exert PI control on the opening degree of the electronic expansion valve (Y2E or Y4E) in response to outdoor temperature and close the valve after the completion of refrigerant charge.For normal operation, fully open this electronic expansion valve.

SH = Tg – Te SH: Evaporator outlet superheated degreeTg: Suction pipe temperature detected by the

heat exchanger gas pipe thermistor R2TTe: Low pressure equivalent saturated

temperature

SH = Tsh – Te SH: Evaporator outlet superheated degree Tsh: Suction pipe temperature detected by

the subcooling heat exchanger outlet thermistor R5T

Te: Low pressure equivalent saturated temperature



2.6 Step Control of Outdoor Unit FansUsed to control the revolutions of outdoor unit fans in the steps listed in table below, according to condition changes.

∗1. Step 2/X∗2. Step X

REYQ72T

Step No.Standard (default)

Cooling Heating·Simultaneous

0 0 01 281 2812 291 2913 301 3014 312 3125 323 3236 334 3347 346 3468 358 3589 368 368

10 401 40111 415 41512 429 42913 444 44414 459 459

15(∗1) 475 47516 491 49117 508 50818 526 52619 544 54420 563 56321 583 58322 603 60323 624 62424 646 64625 669 66926 693 69327 717 71728 743 74329 760 760

30(∗2) 801 80131 845 84532 890 89033 920 920

REYQ96T

Step No.

Standard (default)


FAN1 FAN2 FAN1 FAN20 0 0 0 01 281 0 281 02 290 0 290 03 299 0 299 04 308 0 308 05 348 0 348 06 356 0 356 07 365 0 365 08 375 0 375 09 384 0 384 010 395 0 395 011 405 0 405 012 416 0 416 013 427 0 427 014 438 0 438 015 450 0 450 016 461 0 461 017 474 0 474 018 487 0 487 019 500 0 500 020 513 0 513 021 527 0 527 022 541 0 541 023 556 0 556 024 309 339 309 33925 332 362 332 36226 348 378 348 378

27(∗1) 359 389 359 38928 374 404 374 40429 389 419 389 41930 405 435 405 43531 422 452 422 45232 440 470 440 47033 458 488 458 48834 477 507 477 50735 497 527 497 52736 518 548 518 54837 540 570 540 57038 562 592 562 59239 586 616 586 61640 610 640 610 64041 636 666 636 66642 663 693 663 69343 690 720 690 72044 719 749 719 74945 749 779 749 77946 781 811 781 81147 814 844 814 84448 848 878 848 87849 883 913 883 91350 951 921 951 92151 963 933 963 93352 1055 975 1055 975

53 (∗2) 1097 1017 1097 1017



∗1. Step 2/X∗2. Step X

REYQ120T

Step No.

Standard (default)


FAN1 FAN2 FAN1 FAN20 0 0 0 01 281 0 281 02 291 0 291 03 304 0 304 04 348 0 348 05 360 0 360 06 372 0 372 07 384 0 384 08 396 0 396 09 409 0 409 0

10 423 0 423 011 437 0 437 012 452 0 452 013 467 0 467 014 482 0 482 015 499 0 499 016 516 0 516 017 533 0 533 018 551 0 551 019 570 0 570 020 589 0 589 021 339 369 339 36922 354 384 354 38423 369 399 369 39924 384 414 384 41425 401 431 401 431

26(∗1) 418 448 418 44827 435 465 435 46528 454 484 454 48429 473 503 473 50330 493 523 493 52331 514 544 514 54432 536 566 536 56633 559 589 559 58934 582 612 582 61235 607 637 607 63736 633 663 633 66337 660 690 660 69038 688 718 688 71839 717 747 717 74740 748 778 748 77841 780 810 780 81042 813 843 813 84343 848 878 848 87844 884 914 884 91445 922 952 922 95246 961 991 961 99147 962 1072 962 107248 1005 1115 1005 111549 1050 1160 1050 116050 1096 1206 1096 120651 1135 1265 1110

52(∗2) 1340 1160 1335 1155

REYQ144T

Step No.

Standard (default)


FAN1 FAN2 FAN1 FAN20 0 0 0 01 281 0 281 02 290 0 290 03 303 0 303 04 310 0 310 05 329 0 329 06 348 0 348 07 357 0 357 08 371 0 371 09 386 0 386 010 402 0 402 011 419 0 419 012 436 0 436 013 453 0 453 014 472 0 472 015 491 0 491 016 511 0 511 017 532 0 532 018 554 0 554 019 576 0 576 020 285 315 285 31521 303 333 303 33322 310 345 310 34523 329 359 329 35924 332 362 332 362

25(∗1) 345 375 345 37526 358 388 358 38827 372 402 372 40228 386 416 386 41629 401 431 401 43130 417 447 417 44731 434 464 434 46432 451 481 451 48133 470 500 470 50034 489 519 489 51935 509 539 509 53936 531 561 531 56137 553 583 553 58338 577 607 577 60739 601 631 601 63140 627 657 627 65741 655 685 655 68542 683 713 683 71343 713 743 713 74344 745 775 745 77545 778 808 778 80846 813 843 813 84347 849 879 849 87948 888 918 888 91849 928 958 928 95850 930 1040 930 1040

51(∗2) 1021 1131 1021 113152 1262 1132 1262 113253 1350 1170 1300 1120



2.7 Heat Exchanger ControlWhile in heating or cool/heat simultaneous operation, ensure target condensing and evaporating temperature by changing over the air heat exchange of outdoor unit to the evaporator or the condenser in response to loads.

[Single system]

[Multi outdoor unit system]

Outdoor unit

Lower side

Condenser

Upper side

Condenser

Outdoor unit

Lower side

Evaporator

Upper side

Condenser

Outdoor unit

Lower side

Evaporator

Upper side

Evaporator

Outdoor unit

Lower side

—

Upper side

Condenser

CL decreaseHL increase


CL increaseHL decrease



CL increaseHL increase

1 3

1 3

1 3

1 3

12

2

2

2

2 3

1 2 3

1 2 3

1 2 3

Lower side Upper side

Outdoor unit

Lower side Upper side Lower side Upper sideCondenser CondenserCondenser Condenser — Condenser


Outdoor unit

Lower side Upper side Lower side Upper side— CondenserCondenser Condenser — Condenser


Outdoor unit

Lower side Upper side Lower side Upper side— Condenser— Condenser — Condenser


Outdoor unit

Lower side Upper side Lower side Upper side— Condenser— Condenser — —




Outdoor unit

Lower side Upper side Lower side Upper side— —Evaporator Condenser — —


Outdoor unit

Lower side Upper side Lower side Upper side— —Evaporator Evaporator — —






Outdoor unit

Lower side Upper side Lower side Upper sideEvaporator EvaporatorEvaporator Evaporator — —


Outdoor unit

Lower side Upper side Lower side Upper sideEvaporator EvaporatorEvaporator Evaporator Evaporator Evaporator





<Symbol meanings>CL: Cooling LoadHL: Heating Load






SiUS341504E Protection Control

3. Protection Control3.1 High Pressure Protection Control

This high pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of high pressure.

[In cooling]

Normal Operation

21-step down 9-step up


2-step down

1-step up2-step down

After 10 seconds After 15 seconds

After 15 secondsAfter 10 seconds

Pc > 3.57 MPa(1194 ftH2O)

Pc > 3.70 MPa(1238 ftH2O)

Pc < 3.14 MPa(1050 ftH2O)

Pc < 3.45 MPa(1154 ftH2O)

Pc > 3.67 MPa(1228 ftH2O)

Pc > 3.62 MPa(1211 ftH2O)Pc > 3.57 MPa

(1194 ftH2O)

Compressor step: 1

After 15 seconds

Pc < 3.33 MPa (1114 ftH2O)

After 10 seconds

Upper limit compressor step = max (Max. Step)

Pc > 3.72 MPa(1245 ftH2O)

Pc: High pressure sensor detection value for each outdoor unit

Current step

maintained

Abnormal stop (E3 is displayed)

High pressure standby (2 times within 30 minutes)

After 10 seconds

High pressure switch (4.0 MPa (1338 ftH2O)) is activated


Protection Control SiUS341504E

[In heating]

Pc < 3.17 MPa (1061 ftH2O)Pc < 3.17 MPa

(1061 ftH2O)

Pc > 3.31 MPa(1107 ftH2O)

Pc > 3.39 MPa(1134 ftH2O)

Pc < 3.22 MPa(1077 ftH2O)

Pc > 3.72 MPa (1245 ftH2O)

Normal Operation

System 9-step down/10 seconds

All units Compressor step: 1

System 3-step up/15 seconds

High pressure standby (2 times within 30 minutes)

Pc: High pressure sensor detection value for master unit


Pc > 3.31 MPa(1107 ftH2O)

High pressure switch (4.0 MPa (1338 ftH2O)) is activated



3.2 Low Pressure Protection ControlThis low pressure protection control is used to protect compressors against the transient decrease of low pressure.

[In cooling]

[In heating]

Normal Operation

All compressors step.: 1

Pe < 0.15 MPa(50.2 ftH2O)

Pe < 0.25 MPa(83.6 ftH2O)

Pe > 0.39 MPa(130.5 ftH2O)

Pe < 0.07 MPa (23.4 ftH2O)

Pe: Low pressure sensor detection value for master unit

Master unit: Compressor step: 1 Slave unit: All stop


Low pressure standby (3 times within 60 minutes)


Normal Operation





Pe < 0.17 MPa(56.9 ftH2O)

Pe < 0.13 MPa(43.5 ftH2O)

Pe > 0.27 MPa(90.3 ftH2O)

Pe > 0.20 MPa(66.9 ftH2O)

Pe < 0.17 MPa(56.9 ftH2O)

Pe < 0.14 MPa(46.8 ftH2O)

Compressor step: 1

After 10 seconds


Pe < 0.07 MPa(23.4 ftH2O)

Pe: Low pressure sensor detection value for each outdoor unit

Current step maintained





Protection Control SiUS341504E

3.3 Discharge Pipe Protection ControlThis discharge pipe protection control is used to protect the compressor internal temperature against an error or transient increase of discharge pipe temperature.

[INV compressor]

Normal Operation


9-step down




HTdi > 115˚C(239˚F)

HTdi > 130˚C(266˚F)

HTdi < 100˚C(212˚F)

HTdi < 110˚C(230˚F)

HTdi > 115˚C(239˚F)

HTdi > 118˚C(244.4˚F)HTdi > 120˚C

(248˚F)

Compressor step: 1

After 20 seconds

HTdi > 135˚C (275˚F)HTdi > 120˚C (248˚F)

continues for 10 minutes

OR

HTdi: Value of INV compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature


Current step

maintained

Discharge pipe temperature standby (3 times within 100 minutes)

Abnormal stop(F3 is displayed)

Discharge pipe temperature standby

(2 times within 100 minutes)

After 30 seconds



3.4 Inverter Protection ControlInverter current protection control and radiation fin temperature control are performed to prevent tripping due to an error, or transient inverter overcurrent, and fin temperature increase.In the case of multi-outdoor-unit system, each INV compressor performs these controls in the following sequence.[Inverter overcurrent protection control]Perform the following control of integrated as well as multi units for each INV compressor.

[Radiation fin temperature control]Perform the following control of integrated as well as multi units for each INV compressor.

Normal operation

Inverter current standby

Reduce compressor capacity

A B

When occurring 3 times within 60 minutes, the error code “L8” is output.

C

ModelREYQ72T REYQ96-144T REYQ168T

M1C M1C M2C M1C M2C

A > 18.5 A > 14.7 A > 14.7 A > 14.7 A > 22.0 A

B < 18.5 A < 14.7 A < 14.7 A < 14.7 A < 22.0 A

C > 22.5 A > 16.1 A > 16.1 A > 16.1 A > 22.5 A

Normal operation

Fin temperature standby

Reduce compressor capacity

When occurring 4 times within 60 minutes, the error code “L4” is output.

A B

C

ModelREYQ72T REYQ96-144T REYQ168T

M1C M1C M2C M1C M2C

A > 96 °C (204.8°F) > 99 °C (210.2°F) > 99 °C (210.2°F) > 99 °C (210.2°F) > 80 °C (176°F)

B < 93 °C (199.4°F) < 96 °C (204.8°F) < 96 °C (204.8°F) < 96 °C (204.8°F) < 77 °C (170.6°F)

C > 100 °C (212°F) > 105 °C (221°F) > 105 °C (221°F) > 105 °C (221°F) > 84 °C (183.2°F)


Special Control SiUS341504E

4. Special Control4.1 Pump down Residual OperationIf the liquid refrigerant stays in the evaporator at the startup of a compressor, this liquid refrigerant enters the compressor, thus resulting in diluted oil in the compressor and then degraded lubrication performance.Consequently, in order to recover the refrigerant in the evaporator while the compressor stops, the pump down residual operation is conducted.

∗REYQ72T

Part NameElectric Symbol Function of Functional Part

REYQ72T REYQ96-168T Normal Cooling Normal HeatingInverter compressor 1 M1C M1C 124 Hz/120 Hz∗ 124 Hz/120 Hz∗Inverter compressor 2 — M2C 0 Hz 0 Hz

Inverter fan M1F M1F, M2F For heat exchanger mode For heat exchanger modeElectronic expansion valve (Heat exchanger upper) Y1E Y1E

Same as normal operation Same as normal operationElectronic expansion valve (Heat exchanger lower) Y3E Y3E

Electronic expansion valve (Subcooling heat exchanger) Y2E Y2E 0 pulse 0 pulse

Electronic expansion valve (Receiver gas purge) Y4E Y4E Open slightly Open slightly

Electronic expansion valve (Inverter cooling) Y5E Y5E Same as normal operation Same as normal operation

Solenoid valve (Oil separator oil return) Y1S Y1S, Y2S ON ON

Solenoid valve (Liquid pipe) Y3S Y3S ON ONFour way valve (HP/LP gas pipe) Y4S Y4S Hold Hold

Four way valve (Heat exchanger lower) Y5S Y5S Hold Hold

Four way valve (Heat exchanger upper) Y6S Y6S Hold Hold

Ending condition

A lapse of 30 secondsPe_min < 0.49 Mpa (163.9 ftH2O)Master unit DSH > 35°C (95°F)Pc_max > 2.94 MPa (984 ftH2O)

A lapse of 30 secondsPe_min < 0.25 Mpa (83.6 ftH2O)Master unit DSH > 35°C (95°F)Pc_max > 3.14 MPa (1050 ftH2O)Master unit Ta–Te > 5°C (9°F)

OR OR


SiUS341504E Special Control

4.2 Oil Return OperationIn order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side.

4.2.1 Oil Return Operation in Cooling Operation[Starting conditions]Referring to the set conditions for the following items, start the oil return operation in cooling• Cumulative oil feed rate• Timer setting (Make this setting so as to start the oil return operation when the initial cumulative operating time reaches 2

hours after power supply is turned ON and then every 8 hours.)Furthermore, the cumulative oil feed rate is computed from Tc, Te, and compressor loads.

Part NameElectric Symbol

Oil return operationREYQ72T REYQ96-168T

Inverter compressor 1 M1C M1CConstant low pressure control

Inverter compressor 2 — M2CInverter fan M1F M1F, M2F For heat exchanger modeElectronic expansion valve (Heat exchanger upper) Y1E Y1E

Same as normal operation

Same as normal operationElectronic expansion valve (Heat

exchanger lower) Y3E Y3E

Electronic expansion valve (Subcooling heat exchanger) Y2E Y2E 0 pulse

Electronic expansion valve (Receiver gas purge) Y4E Y4E 0 pulse

Electronic expansion valve (Inverter cooling) Y5E Y5E Same as normal operationSolenoid valve (Oil separator oil return) Y1S Y1S, Y2S ONSolenoid valve (Liquid pipe) Y3S Y3S ONFour way valve (HP/LP gas pipe) Y4S Y4S HoldFour way valve (Heat exchanger lower) Y5S Y5S HoldFour way valve (Heat exchanger upper) Y6S Y6S Hold

Ending condition

• A lapse of 3 minutes• TsA – Te < 3°C (5.4°F)• A lapse of 6 minutes while the

frequency is more than that of oil return operation.

&OR

Indoor unit actuator Oil return operation

FanThermostat ON unit Remote controller setting

Stopping unit OFFThermostat OFF unit Remote controller setting

Electronic expansion valveThermostat ON unit Normal control

Stopping unit 224 pulseThermostat OFF unit Forced thermo. OFF (PI control)

Branch selector unit actuatorNormal cooling Normal Simultaneous Cooling / Heating Normal heating


Electronic expansion valve (EVSC)

Y1EThermo. ON 0 pulse 0 pulse Subcooled degree control 0 pulse

Stopping 0 pulse 0 pulse 0 pulse 0 pulseThermo. OFF 0 pulse 0 pulse 0 pulse 0 pulse

Electronic expansion valve (EVH)

Y2EThermo. ON 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse

Stopping 6,000 pulse 0 pulse 6,000 pulse 6,000 pulseThermo. OFF 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse

Electronic expansion valve (EVL)

Y3EThermo. ON 6,000 pulse 6,000 pulse 0 pulse 0 pulse

Stopping 6,000 pulse 6,000 pulse 0 pulse 0 pulseThermo. OFF 6,000 pulse 6,000 pulse 0 pulse 0 pulse



4.2.2 Oil Return Operation in Heating Operation[Starting conditions]


Oil return operationREYQ72T REYQ96-168T

Inverter compressor 1 M1C M1C +1 to +6 steps from frequency to frequency when oil return is IN at a constant levelInverter compressor 2 — M2C

Inverter fan M1F M1F, M2F Same as normal operation

Electronic expansion valve (Heat exchanger upper) Y1E Y1E

Same as normal operationElectronic expansion valve (Heat exchanger lower) Y3E Y3E

Electronic expansion valve (Subcooling heat exchanger) Y2E Y2E Same as normal operation


Electronic expansion valve (Inverter cooling) Y5E Y5E Same as normal operation

Solenoid valve (Oil separator oil return) Y1S Y1S, Y2S ON

Solenoid valve (Liquid pipe) Y3S Y3S ONFour way valve (HP/LP gas pipe) Y4S Y4S HoldFour way valve (Heat exchanger lower) Y5S Y5S Hold

Four way valve (Heat exchanger upper) Y6S Y6S Hold

Ending condition A lapse of 8 minutes while the frequency is more than that of oil return operation.

Indoor unit actuator Cooling Heating

FanThermostat ON unit Remote controller setting Remote controller setting

Stopping unit OFF OFF

Thermostat OFF unit Remote controller setting Remote controller setting

Electronic expansion valveThermostat ON unit Normal control Normal control

Stopping unit 224 pulse 224 pulse

Thermostat OFF unit Forced thermo. OFF 224 pulse




Y1EThermo. ON 0 pulse 0 pulse Subcooled degree

control 0 pulse

Stopping 0 pulse 0 pulse 0 pulse 0 pulseThermo. OFF 0 pulse 0 pulse 0 pulse 0 pulse



Stopping 6,000 pulse 0 pulse 6,000 pulse 6,000 pulseThermo. OFF 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse



Stopping 6,000 pulse 6,000 pulse 0 pulse 0 pulseThermo. OFF 6,000 pulse 6,000 pulse 0 pulse 0 pulse



4.3 Defrost OperationTo defrost the outdoor unit heat exchanger while in Evaporator, the defrost operation is conducted to recover the heating capacity.


Defrost operationREYQ72T REYQ96-168T

Inverter compressor 1 M1C M1CREYQ72: HzREYQ96/120: HzREYQ144/168: Hz

Inverter compressor 2 — M2C With high pressureOFF ←→Step 2/X ←→ Step XInverter fan M1F M1F, M2F

Electronic expansion valve (Heat exchanger upper) Y1E Y1E

100%Electronic expansion valve (Heat exchanger lower) Y3E Y3E

Electronic expansion valve (Subcooling heat exchanger) Y2E Y2E 0 pulse


Electronic expansion valve (Inverter cooling) Y5E Y5E Same as normal operation

Solenoid valve (Oil separator oil return) Y1S Y1S, Y2S ON

Solenoid valve (Liquid pipe) Y3S Y3S ONFour way valve (HP/LP gas pipe) Y4S Y4S Hold

Four way valve (Heat exchanger lower) Y5S Y5S Hold

Four way valve (Heat exchanger upper) Y6S Y6S Hold

Ending condition • A lapse of 15 minutes• Tb>11°C (51.8°F) continues for 30 seconds or moreOR

Indoor unit actuator Defrost operation

Fan

Thermostat ON unit OFF

Stopping unit OFFThermostat OFF unit OFF


Thermostat ON unit Defrost EV opening degree

Stopping unit Defrost EV opening degreeThermostat OFF unit Defrost EV opening degree




Y1EThermo. ON 0 pulse 0 pulse Subcooled degree

control 0 pulse

Stopping 0 pulse 0 pulse 0 pulse 0 pulse

Thermo. OFF 0 pulse 0 pulse 0 pulse 0 pulse



Stopping 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse

Thermo. OFF 6,000 pulse 0 pulse 6,000 pulse 6,000 pulse



Stopping 6,000 pulse 6,000 pulse 0 pulse 0 pulse

Thermo. OFF 6,000 pulse 6,000 pulse 0 pulse 0 pulse



4.4 Cooling / Heating Mode Switching[While in cooling / heating mixed mode, single-room cooling → heating]First, the electronic expansion valve of the indoor unit in cooling operation will close, and the Y2E and Y3E electronic expansion valves of the branch selector unit will all close once.Next, the Y2E electronic expansion valve will open little by little to perform pressure equalization.Then the electronic expansion valve will fully open, and the electronic expansion valve of the indoor unit will open to activate the heating circuit.The required switching time is approximately 6 minutes. (Field settings, however, can shorten the time from 6 minutes to 4 minutes.)

(1) In cooling operation

(2) In equalization

(3) To heating mode

Y2E

Y3E

Y1ELiquid pipe


Suction gas pipe

Branch selector unitOutdoor unit

Cooling unit

Y2E (open)

Y3E (close)

Y1E

Branch selector unitIndoor unit

(close)Liquid pipe

Suction gas pipe


Y2E

Y3E

Y1E

Heating unit



Suction gas pipe

Liquid pipe



[While in cooling/heating mixed mode, single-room heating → cooling]First, the electronic expansion valve of the indoor unit in heating operation will close, and the Y2E and Y3E electronic expansion valves of the branch selector unit will all close once.Next, the Y3E electronic expansion valve will open little by little to perform pressure equalization.Then the electronic expansion valve will fully open, and the electronic expansion valve of the indoor unit will open to activate the heating circuit.The required switching time is approximately 6 minutes. (Field settings, however, can shorten the time from 6 minutes to 4 minutes.)

(1) In heating

(2) In equalization

(3) To cooling

Y2E

Y3E

Y1E

Heating unit



Liquid pipe

Suction gas pipe

Y2E (open)

Y3E (close)

Y1E

In equalization

(close)


Liquid pipe


Suction gas pipe

Y2E

Y3E

Y1E


Cooling unit

Liquid pipe


Suction gas pipe



[While in all-room cooling operation → All-room cooling/heating simultaneous operation]

(1) All the indoor units in cooling operation· Using the dual pressure gas pipe as a suction

gas pipe.

(2) Pump-down residual operation

(3) Pre-startup control· Switching between the electronic expansion

valves of branch selector unit.· Required switching time: 30 seconds (switching

control time)(While switching: The compressor stops operating.)

(4) Startup control· Switching the dual pressure gas pipe from low

pressure to high pressure.

(5) Into heating operation or cooling and heating simultaneous operation

Each indoor unit· In warm air supply operation under cool air

prevention control (for 3 to 5 minutes).

Suction gas pipe


Cooling Cooling Cooling Cooling Cooling

Suction gas pipe


Heating Heating Heating Heating

Heating

Liquid pipe

Liquid pipe

Suction gas pipe


Liquid pipe



[While in all-room heating operation or cooling/heating simultaneous operation → All-room cooling]

(1) In heating operation or cooling and heating simultaneous operation

· Using the dual pressure gas pipe as a suction gas pipe.

(2) Pump-down residual operation

(3) Pre-startup control· Switching between the electronic expansion

valves of branch selector unit.· Required switching time: 2 to 4 minutes

(switching control time)(While switching: The compressor stops operating.)

(4) Startup control· Switching the dual pressure gas pipe from low

pressure to high pressure.

(5) Into all-unit cooling operation· In cool air supply operation

Suction gas pipe


Heating Heating Heating Heating Heating

Suction gas pipe


Vent Vent VentVentVent

Cooling Cooling CoolingCooling

Suction gas pipe


Cooling

Liquid pipe

Liquid pipe

Liquid pipe


Other Control SiUS341504E

5. Other Control5.1 Backup Operation

If any of the compressors goes wrong, disable the relevant compressor or the relevant outdoor unit from operating, and then conduct emergency operation only with operational compressors or outdoor units."Emergency operation with remote controller reset" and "Emergency operation with outdoor unit PCB setting" are available

(1) Emergency operation with remote controller reset[Operating method]

Reset the remote controller. (Press the button for 4 seconds or more.)[Details of operation]

Disable the defective outdoor unit from operating, and then only operate other outdoor units.(On the system with 1 outdoor unit, this emergency operation is not available.)

(2) Emergency operation with outdoor unit PCB setting[Setting method]

Make setting of the compressor, "the operation of which is to be disabled", in field setting mode (setting mode 2).

[Details of operation]Disable the compressor with "operation disable setting" made from operating and only operate other compressors.(On the system with 1 compressor, REYQ72T, this emergency operation is not available.)

5.2 Demand OperationIn order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting” or “Demand 2 Setting”.To operate the unit with this mode, additional setting of “Continuous Demand Setting” or external input by external control adaptor for outdoor unit is required.

5.3 Heating Operation Prohibition

Heating operation is prohibited when the outdoor air temperature is above 24°C (75.2°F).

Operating methodApplicable model

(1) Emergency operation with remote controller reset

(Auto backup operation)

(2) Emergency operation with outdoor unit PCB setting

(Manual backup operation)

REYQ96-168T – Backup operation by the compressor

REYQ192-456T Backup operation by the outdoor unit

Backup operation by the outdoor unit

ON/OFF

Setting item Condition Content

Demand 1 Level 1 The compressor operates at the power of 60% or less of the rating.

Level 2 The compressor operates at the power of 70% or less of the rating.

Level 3 The compressor operates at the power of 80% or less of the rating.

Demand 2 The compressor operates at the power of 40% or less of the rating.

Demand 3 Forced thermostat OFF


SiUS341504E Outline of Control (Indoor Unit)

6. Outline of Control (Indoor Unit)6.1 Operation Flow Chart

Is test run in progress?

Is freeze-up prevention operation in

progress?

Is Restart prevention

operation in progress?(5 min.)

Dew prevention condition?

Is the safety device

activated?

Start

Heating Operation Fan OperationCooling Operation

Cooling Operation

Detect louver lock

( )Run or Stop?

RUN indicating lamp: OFF

RUN indicating lamp: BlinkError code: Displayed

RUN indicating lamp: OFFError mode display: Reset

Thermostat status

Swing flap

Swing flap Set wind direction

Program dry display: Reset

Program dry operation

A

A

A

Stop

Run

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

ON

OFF

No

No

No

∗1

Fan

Temp. control

Heating

Cooling

∗2 Fan : Stop

Louver : Stop

∗3

∗6

∗5

∗4

(Option)

(Option)

(Option)

(Option)

(Option)

(Option)

OFF

ON

MF

MF

: OFFMP

Drain pump kit

MP

Drain pump kit

MP

Drain pump kit

:ONMP

Drain pump kit

: ONMP

: Closed20E


: Capacity control20E


: Closed20E

MA

: OFF52H

: OFF52H

Humidifier : OFFMu

Humidifier : OFFMu

20E

OFF

ON

a b

Set temperature

The previous settings of airflow rate, wind direction, and temperature are displayed.

Is the RUN indicating lamp

blinking?

Press the RESET RUN/STOP push button.


Thermostat-ON-operation signal to outdoor unit: Output

Thermostat-ON-operation signal to outdoor unit: Output

∗1. If any error occurs, the relevant error code will be displayed according to the error code display of the remote controller.

∗2. When the aux. electric heater turns ON, the fan will stop after it conducts residual operation for 1 min.∗3. When the drain pump kit turns ON, the drain pump kit will stop after it conducts residual operation for a

period of 5 min.∗4. If the evaporator inlet temperature is kept at not more than –5°C (23˚F) for a period of cumulative 10

min. or not more than –1°C (30.2˚F) for a cumulative period of 40 min., freeze-up prevention operation will be conducted. If the evaporator inlet temperature is kept at not less than 7°C (44.6˚F) for a consecutive period of 10 min., the freeze-up prevention operation will be reset.

∗5. Thermostat status

∗6. The FXFQ series have the drain pump as standard equipment.

RUN indicating lamp: ON

Airflow rate display: Displayed

Wind direction display: Displayed

Temp. setting display: Displayed

Turn ON power supply

Initialize electronic expansion valve

LED in remote controller turns ON

Cyclic operation with RUN/STOP push button

Fan or Temp. control?

Cooling or Heating?

Drain pump kit

Aux. electric heater


Dew prevention position Cassette type: P1Ceiling suspended type: P0

Program dry ON/OFF

Fan:Operating with set airflow rate

: OFF after 5-min. residual operation


Suction air temperaturea = b = 1˚C (1.8˚F)(a = b = 0.5˚C (0.9˚F) is only available for the FXFQ and FXHQ series.)


Outline of Control (Indoor Unit) SiUS341504E

Is outlet air

temperature drop protection in progress?

Is test run in progress?

Restart prevention operating

in progress?(4 min.)

Is hot starting in progress?

Is defrost operation in

progress?

Program dry operation Heating Operation

Fan Operation

Thermostat status

A

A

A

OFF

Yes

ON

No

Suction air temperature

∗7

∗8

∗9

∗10

∗11

Thermostat status

No

No

∗14

∗15

(Option)

(Option) (Option) (Option) (Option)

(Option)

: OFFMP

: OFF52H

Humidifier : OFFMu

: OFF52H

Humidifier : ON

: OFF

Humidifier : OFF

: ON

Humidifier : ONMu

52H

Mu

: OFF52H

Humidifier : OFFMu

52H

Mu

(option)

: OFFMP

Fan :Operating in L mode

MF

Fan : Operatingin L mode after it stops for 6 min.

MF

20E :

Drain pump kit

20E :

MP

Swing flap


Fan MF:Operating with set airflow rate

20E :

Yes

Yes

No

No

No

∗12

∗13

∗12

Yes

Yes

Yes

Swing flap?


Fan :Operating with set airflow rate

MF

20E :20E : 20E :

Fan :LL operation

MF Fan :Operating in L mode

MF Fan :Stop

MF

ba

–2˚C (28.4˚F)–4˚C (24.8˚F)Suction air temp.

Set temp.

b

a

(3)

(2)

(1)

(3)

(2)

(1)

Closed

DEFROST/HOT STARTindicating lamp: OFF

Closed

DEFROST/HOT START indicating lamp: ON

∗9. Fan operationBy setting the remote controller to Fan, the fan will operate with thermostat OFF in set temperature control operation mode.

∗10. Set wind directionAccording to wind direction instruction from the remote controller, the wind direction is set to 100% horizontal while in heating operation.

∗11. FanAccording to fan speed instruction from the remote controller, the fan is put into operation in LL mode while in heating operation.

∗12. Wind directionWhen the heating thermostat turns OFF, the wind direction will be set to 100% horizontal.

∗13. Hot startIf the condenser inlet temperature exceeds 34°C (93.2˚F) at the time of starting operation or after the completion of defrost operation, or until 3 minutes pass or Tc is above 52°C (125.6˚F), hot starting will be conducted.

∗14. Thermostat status

∗15. Outlet air temperature drop protectionWhen the set temperature is below 24°C (75.2˚F) or the electronic expansion valve opening is small, the protection will be activated.

Program dry display

Electronic expansion valve Superheated degree control

Electronic expansion valve Closed

Drain pump kit

Electronic expansion valve Capacity control

Electronic expansion valve Open



Drain pump kit


∗7. Program dry displayNo set temperature and airflow rate of the remote controller are displayed.

∗8. Thermostat statusSet temperature when operating the program dry mechanism.








6.2 Thermostat Control6.2.1 Thermostat Control While in Normal Operation

VRV multi systems are set at factory to thermostat control mode using the remote controller. While in normal thermostat differential control mode (i.e., factory setting mode), the thermostat turns OFF when the system reaches a temperature of –1°C ( –1.8°F) from the set temperature while in cooling operation or of +1°C (+1.8°F) from that while in heating operation.

While in a single remote controller group control, the suction air thermistor in the indoor unit is only used from this control.Furthermore, while in heating operation, ceiling mounted cassette type indoor units conduct the thermostat control by a value compensated by –2°C (–3.6°F) for the value detected with the suction air thermistor in the indoor unit. (Through field settings, the thermostat differential setting can be changed from 1°C (1.8°F) to 0.5°C (0.9°F). For details on the changing procedure, refer to information on page onward.)

6.2.2 Thermostat Control in Dry OperationWhile in dry operation, the thermostat control is conducted according to a suction air temperature at the time of starting the dry operation.

Assuming that the suction air temperature at the time of starting the dry operation is Tro and the suction air temperature in operation is Tr,

Furthermore, while in dry operation mode, fans operate at L flow rate, stops for a period of 6 minutes while the thermostat is OFF, and then return to operation at L flow rate. (This control is used to prevent a rise in indoor humidity while in thermostat OFF mode.)

Cooling operation:

Heating operation:

Normal operation Thermostat OFF

Normal operation Thermostat OFF

Tr: Temperature detected with the suction air thermistor (R1T)

Tr < Set temperature –1˚C(–1.8˚F)

Tr > Set temperature +1˚C(+1.8˚F)

when Tro ≤ 24.5˚C:(76.1˚F)

when Tro > 24.5˚C:(76.1˚F)

In dry operation

In dry operation

Thermostat OFF

Thermostat OFF

Tro: Suction air temperature at the time of starting the dry operation

Tr: Temperature detected with the suction air thermistor (R1T)

Tr < Tro –1˚C(–1.8˚F)

Tr < Tro –1.5˚C(–2.7˚F)



6.2.3 Thermostat Control with Operation Mode Set to "AUTO"When the operation mode is set to "AUTO" on the remote controller, the system will conduct the temperature control shown below.Furthermore, setting changes of the differential value (D) can be made according to information in the "Field Setting from Remote Controller (P.100 and later)" section.

: Factory setting

Mode No.

First code No. Contents of setting

Second code No.

01 02 03 04 05 06 07 08

12 4 Differential value while in "AUTO" operation mode

0°C0°F

1°C1.8°F

2°C3.6°F

3°C5.4°F

4°C7.2°F

5°C9.0°F

6°C10.8°F

7°C12.6°F

Cooling thermostat ON

Cooling thermostat OFF

Heating thermostat ON

Heating thermostat OFF

(Ex.) When automatic cooling temperature is set to 27°C (80.6°F):

D

3°C (5.4°F)

2D( + 3.6)°F2D( + 2)°C

Set cooling temperature A

Set heating temperature (A – D)

Display change Cooling → Heating

Display change Heating → Cooling

Differential value: 0°C (0°F)

30°C(86°F)

Heating mode

Cooling mode

Control temp.

Differential value set to 1°C (1.8°F)Set heating temp. Set cooling temp.

Heating mode

Control temp.

Differential value set to 2°C (3.6°F)

Heating mode

Control temp.


Heating mode

Cooling mode

Control temp.

Set heating temp. Set cooling temp.

Set heating temp. Set cooling temp.


Heating mode

Cooling mode

Control temp.

Differential value set to 5°C (9°F)Set heating temp. Set cooling temp.

Heating mode

Cooling mode

Control temp.


Heating mode

Cooling mode

Control temp.


Heating mode

Cooling mode

Control temp.

Set cooling temp.

Set cooling temp.

Set heating temp. Set cooling temp.Set cooling/ heating temp.

25°C (77°F)

27°C (80.6°F)

26°C (78.8°F)24.5°C

(76.1°F)

27°C (80.6°F)

29°C (84.2°F)

24°C (75.2°F)

25°C (77°F)

27°C (80.6°F)

28°C (82.4°F)

23.5°C (74.3°F)

24°C (75.2°F)

27°C (80.6°F) 20°C

(68°F)

21.5°C (70.7°F)

23°C (73.4°F)

27°C (80.6°F)

21°C (69.8°F)

22°C (71.6°F)

24°C (75.2°F)

27°C (80.6°F)

22°C (71.6°F)

22.5°C (72.5°F)

25°C (77°F)

27°C (80.6°F)

23°C (73.4°F)

26°C (78.8°F)

27°C (80.6°F)

Cooling mode

Cooling mode

Set heating temp.

Set heating temp.



6.3 Drain Pump Control6.3.1 Normal Operation

• The float switch is OFF in normal operation.• When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously.• After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.• The aim of residual operation after thermostat OFF is to eliminate the dew that condenses on

the indoor heat exchanger during cooling operation.

6.3.2 If the Float Switch is ON with the Thermostat ON in Cooling Operation

• When the float switch turns ON, the thermostat turns OFF simultaneously.• After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.∗1. If the float switch turns OFF again during the residual operation of the drain pump, cooling

operation also turns on again (thermostat ON).∗2. If the float switch remains ON even after the residual operation of the drain pump has ended,

the error code A3 is displayed on the remote controller.∗3. The drain pump turns OFF once residual operation has ended, then turns ON again after 5

seconds.∗4. After A3 is displayed and the unit comes to an abnormal stop, the thermostat will remain OFF

even if the float switch turns OFF again.

Float switch

Error display

Thermostat (running)

ON

OFF

OFF

ON

ON

OFF

Drain pumpON

OFF

5 min.

ON

OFF

OFF

ON

ON

OFF

ON

OFF

5 min.5 min. 5 sec. 5 sec.

Float switch

Error display


Drain pump

A3

∗1 ∗2 ∗4

∗3



6.3.3 If the Float Switch is ON with the Thermostat OFF in Cooling Operation

• When the float switch turns ON, the drain pump turns ON simultaneously.• If the float switch remains ON even after the residual operation of the drain pump has ended,

the error code A3 is displayed on the remote controller.• The drain pump turns OFF once residual operation has ended, then turns ON again after 5

seconds.

6.3.4 If the Float Switch Turns ON and OFF Continuously, or the Float Switch Turns ON While AF Displayed

• When the float switch turns ON, the drain pump turns ON simultaneously.∗1: If the float switch continues to turn ON and OFF 5 times consecutively, it is judged as a drain

system error and the error code AF is displayed on the remote controller.∗2: The drain pump continues to turn ON/OFF in accordance with the float switch ON/OFF even

after AF is displayed on the remote controller.∗3: While the error code AF is displayed, if the float switch remains ON even after the residual

operation of the drain pump has ended, the error code A3 will be displayed on the remote controller.

ON

OFF

OFF

ON

ON

OFF

ON

OFF

5 min. 5 sec.

Float switch

Error display


Drain pump

A3

ON

OFF

OFF

ON

ON

OFF

ON

OFF

5 min. 5 min. 5 min. 5 min. 5 min. 5 min. 5 sec.5 min.

1st 2nd 3rd 4th 5th

AF A3

Float switch

Error display


Drain pump

∗1 ∗3∗2



6.4 Control of Electronic Expansion ValveElectronic expansion valves in indoor units have the functions of conducting superheated degree control in cooling operation and subcooling degree control in heating operation. However, if the indoor units receive any control command such as a protection control command or a special control command from the outdoor unit, the units will give a priority to the control command.

• Superheated degree control in cooling operation

This function is used to adjust the opening of the electronic expansion valve so that superheated degree (SH), which is calculated from the detection temperature (Tg) of the gas pipe thermistor (R3T) and the detection temperature (Tl) of the liquid temperature thermistor (R2T) of the indoor unit, will come close to a target superheated degree (SHS).At that time, correction to the superheated degree is made according to the differences (∆T) between set temperature and suction air temperature.

• Normally 5°C (9°F)• As ∆T (Remote controller set temp. – Suction air temp.) becomes larger, SHS becomes

lower.• As ∆T (Remote controller set temp. – Suction air temp.) becomes smaller, SHS becomes

higher.

• Subcooling degree control in heating operation

This function is used to adjust the opening of the electronic expansion valve so that the high pressure equivalent saturated temperature (Tc), which is converted from the detected pressure of the high pressure sensor in the outdoor unit, and the subcooling degree (SC), which is calculated from the detected temperature (Tl) of the liquid temperature thermistor (R2T) in the indoor unit, will come close to the target subcooling degree (SCS).At that time, corrections to the subcooling degree are made according to differences (∆T) between set temperature and suction air temperatures.

• Normally 5°C (9°F)• As ∆T (Remote controller set temp. – Suction air temp.) becomes larger, SCS becomes

lower.• As ∆T (Remote controller set temp. – Suction air temp.) becomes smaller, SCS becomes

higher.

SH = Tg – Tl SH: Evaporator outlet superheated degreeTg: Indoor unit gas pipe temperature (R3T)Tl: Indoor unit liquid pipe temperature (R2T)

SHS (Target SH value) SHS: Target superheated degree

SC = Tc – Tl SC: Condenser outlet subcooling degreeTc: High pressure equivalent saturated temperature

detected by the high pressure sensor (S1NPH)Tl: Indoor unit liquid pipe temperature (R2T)

SCS (Target SC value) SCS: Target subcooling degree



6.5 Freeze-up PreventionFreeze-up Prevention by Off Cycle (Indoor Unit)

When the temperature detected by liquid pipe thermistor (R2T) of the indoor unit heat exchanger drops too low, the unit enters freeze-up prevention operation in accordance with the following conditions, and is also set in accordance with the conditions given below.When freeze-up prevention is activated, the electronic expansion valve is closed, the drain pump turns ON and the fan tap is fixed to L airflow. When the following conditions for stopping are satisfied, it returns.

• Conditions for starting freeze-up preventionTemperature is –1°C (30.2°F) or less for total of 40 minutes, or temperature is –5°C (23°F) or less for total of 10 minutes.Conditions for stopping freeze-up prevention: Temperature is 7°C (44.6°F) or more for 10 minutes continuously.

• Conditions for starting when airflow direction is two-way or three-wayTemperature is 1°C (33.8°F) or less for a total of 15 minutes or 0°C (32°F) or less for 1 minute continuously.

–5˚C(23˚F)

0˚C(32˚F)

7˚C(44.6˚F)

–1˚C(30.2˚F)

t1 t2 t3 t4

0˚C(32˚F)

7˚C(44.6˚F)

10 minutes

OR

10 minutes

10 minutes t > 40 minutes

Freeze-up prevention operationForced OFF by thermostat

Freeze-up prevention operationForced OFF by thermostat

0˚C(32˚F)

7˚C(44.6˚F)

10 minutes

1 minute

1˚C(33.8˚F)

t1 t2 t3 t4

7˚C(44.6˚F)

10 minutes

OR

t > 15 minutes

Freeze-up prevention operationForced OFF by thermostat Freeze-up prevention operation

Forced OFF by thermostat



6.6 Heater Control (Optional PCB KRP1B ... is required.)The heater control is conducted in the following manner.[Normal control]While in heating, the heater control (ON/OFF) is conducted as shown on the right.

[Overload control]When the system is overloaded in heating, the heater will be turned OFF in the following 2 manners.(1) The heater control (ON/OFF) is

conducted through the liquid pipe temperature (R2T) of the indoor unit.

(2) The heater control (ON/OFF) is conducted by converting the heater temperature into the condensing pressure equivalent saturated temperature (Tc) according to the temperature detection through the high pressure sensor (S1NPH) of the outdoor unit.

[Fan residual operation]While the heater turns OFF, in order to prevent the activation of the thermal protector, the fan conducts residual operation for a given period of time after the heater turns OFF. (This operation is conducted regardless of with or without heater equipped.)

Residual operation time = 100 seconds on ceiling suspended type or 60 seconds on other types

ON Set temperature

OFF2˚C

(3.6˚F)2˚C

(3.6˚F)

ON 43˚C (109.4˚F)

OFF

50˚C (122˚F)Liquid pipe temperature

ON 50˚C (122˚F) 60˚C (140˚F)

OFF

Condensing pressure equivalent saturated temperature



6.7 List of Swing Flap OperationsSwing flaps operate as shown in table below.

Note: ∗1. L or LL only on FXFQ models

FanFlap

FXFQ FXHQ FXAQ

Heating

Hot start from defrosting operation

Swing OFF Horizontal Horizontal Horizontal

Airflow direction set OFF Horizontal Horizontal Horizontal

Defrosting operationSwing OFF Horizontal Horizontal Horizontal

Airflow direction set OFF Horizontal Horizontal Horizontal

Thermostat OFFSwing LL Horizontal Horizontal Horizontal

Airflow direction set LL Horizontal Horizontal Horizontal

Hot start from thermostat OFF mode (for prevention of cold air)

Swing LL Horizontal Horizontal Horizontal

Airflow direction set LL Horizontal Horizontal Horizontal

StopSwing OFF Horizontal Horizontal Totally closed

Airflow direction set OFF Horizontal Horizontal Totally closed

Cooling

Thermostat ON in program dry

Swing L (∗1) Swing Swing Swing

Airflow direction set L (∗1) Set Set Set

Thermostat OFF in program dry

SwingOFF or L

Swing Swing Swing

Airflow direction set Horizontal or Set Set Set

Thermostat OFF in cooling

Swing Set Swing Swing Swing

Airflow direction set Set Set Set Set

StopSwing OFF Horizontal Horizontal Totally closed

Airflow direction set OFF Horizontal Horizontal Totally closed

Micro-computer control (including cooling operation)

Swing L Swing Swing Swing

Airflow direction set L Set Set Set



6.8 Hot Start Control (In Heating Only)At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity.[Detail of operation]When either the starting condition 1 or the starting condition 2 is established, the operations shown below will be conducted.

FXTQAt startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity.[Detail of operation]When either the starting condition 1 or the starting condition 2 is established, the operations shown below will be conducted.

TH2: Temperature detected with the gas thermistor

TC : High pressure equivalent saturated temperature

Defrost ending or oil return ending or Thermostat ON

The fan is not OFF before initiating the hot start: LL The fan is OFF before initiating the hot start: OFF

Hot start control Hot start in progress

Normal control

Normal control

H/L remote controller setting

LL

OFF

Remote controller setting

Po (Horizontal)

Fan

Louv

er

Hot start ending conditions· lapse of 3 minutes· TH2 > 34˚C (93.2˚F)· Tc > 52˚C (125.6˚F)

OR

The fan is not OFF before initiating the hot start: LL The fan is OFF before initiating the hot start: OFF

The fan is ON: ONThe fan is OFF: OFF

Hot start control Hot start in progress

Normal control

Normal control

Normal control

H/L remote controller setting

LL

OFF

OFF

ON

OFF

ON

Fan

Hea

ter

Hum

idifi

er

30 sec.

Hot start delay

Hot start ending conditions• lapse of 3 minutes• TH2 > 34˚C (93.2˚F)• Tc > 52˚C (125.6˚F)

OROR

Hot start start conditions· Starting condition 1: Defrost ending or

oil return ending· Starting condition 2: Thermostat ON



6.9 Louver Control for Preventing Ceiling DirtWe have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted cassette type units from being soiled. (This feature is available on round flow, 4 way ceiling mounted cassette (2'×2') types.)

Note: The factory setting position of FXFQ model only (round flow) is draft prevention position.

P0

P1

P2

P4P3

P0

P1

P2

P4P3

P0 P0

P1P2

P4 P4P2'

P1'P0'

P4' P4''P3'

P2''P1''

P0''

P3''

Existing position

Draft prevention position

Draft prevention position

Standard position

Prohibited

ProhibitedDirt prevention position

P0

P0'

P0''

P1' P2'

P2''P1''

P3'

P3'' P4''

P4'

P1 P2 P3 P4 Same as existing position

Separated into 5 positions (P1 - 4)

Separated into 5 positions (P2 - 4)

Range of direction adjustment

Range of direction adjustment

The factory setting position is standard position.

Standard Setting position

Ceiling soiling prevention position



6.10 Heater Control (FXTQ)6.10.1 Auxiliary Heater Control

If heating is insufficient in heat pump system alone, an electrical heater is to be used as the auxiliary heater. The following shows the ON/OFF conditions for the electric heater.

Note: ∗1. Fixing of the fan H tap.∗2. The heater backup prohibiting conditions are prioritized. Even when the heater ON conditions

are met, the heater is turned OFF when the prohibiting conditions are met.

Thermostat OFF/Stop operation

Thermostat step 1Heat Pump: Fan normal operation

Continues for 5 minutes



Timer clear

Timer clear

Timer clear

Fan H tap120 seconds (∗2)


Thermostat OFF

Condition A

Electrical heater step setting 01

Thermostat step 3 = "ON"


Elimination of Condition A



Thermostat step 3 = "OFF"


Heater 1 ONHeater 2 ONFan H tap (∗1)

Heater 1 ONHeater 2 OFFFan H tap (∗1)

• Thermostat OFF• Stop operation




6.10.2 Heat Pump Lockout ModeDuring heating operation, users can select an electrical heater for heating. For this, signals are sent using ABC terminal of outdoor unit PCB.When the hot-water heating signal is received from the outdoor unit PCB, heating operation is performed only with the heater as manual backup operation. The ON/OFF conditions for this electrical heater are shown below.

Thermostat OFF/Stop operation

Thermostat step 1 H/PFan: Normal operation

Timer count: 5 minutes



Timer clear

Timer clear

Timer clear



Thermostat ON

Condition A

Electrical heater step setting 01



Condition B

Condition B

Condition B



• Thermostat OFF• Stop operation

Heater 1 ONHeater 2 OFFFan H tap (∗1)





Note: ∗1. Fixing of the fan H tap.∗2. The heater backup prohibiting conditions are prioritized. Even when the heater ON conditions

are met, the heater is turned OFF when the prohibiting conditions are met.∗3. The operation must continue for a certain period of time after the heater turns OFF.4. The thermostat steps for this control comply with the “6.11 4 Step Thermostat Processing

(FXTQ)”.

6.11 4 Step Thermostat Processing (FXTQ)[Outline]The thermostat ON/OFF for the indoor unit is controlled in accordance with [Thermostat Step 1].The heater ON/OFF operation during heating is controlled in accordance with [Thermostat Step 2, 3, or 4] or [Thermostat Step 1, 2, or 3].For more details of the heater, see “9.10 Heater Control (FXTQ)”.[Detail]

Note: ∗1. This value varies according to the field setting

&

&OR

Condition A

• Hot-water heater = "1" (ON)

OR

Condition B

Heater backup prohibiting

conditions (∗2)

• Heating mode

• Thermostat step 1 = "ON"

• Not during fan residual operation

• [Electrical heater setting] = "01"

• [Electrical heater setting] = "03"

• Elimination of Condition A

• Indoor unit error [Stop due to error]

• Indoor unit error [Abnormal stop]

• Indoor unit error [Remote control thermistor error]

• Indoor unit error [Suction air thermistor error]

• During defrosting or oil return operation

&

OR

• Drain pump abnormal output = OFF• Thermostat OFF error has not occurred.• Forced thermostat OFF = "0" (OFF) • Normal operation = ON

• Remote control operation mode = "Heating"• Not during anti-freeze operation

• [Thermostat step 1] = "OFF"• [Thermostat step 2] = "OFF"• [Thermostat step 3] = "OFF"• [Thermostat step 4] = "OFF" Elimination conditions of the above

Perform the processing in the following chart.

(1) Cooling (2) Heating

1°C (∗1)(1.8°F)

1°C (∗1)(1.8°F)

Set temperature

Controlled temperature

[Thermostat step 1]ON

OFF

4˚C (7.2˚F)2˚C (3.6˚F)


OFF

Set temperature


OFF

[Thermostat step 4]

1°C (∗1)(1.8°F)

1°C (∗1)(1.8°F)

<Ttson><Ttsoff>


OFF

[Thermostat step 3]

1.5˚C (2.7˚F)1.5˚C (2.7˚F)

1.5˚C (2.7˚F)1.5˚C (2.7˚F)

ONOFF

ONOFF

Controlled temperature



6.12 Interlocked with External Equipment (FXTQ)6.12.1 Humidifier

When a humidifier is connected onsite, the fan operates with the airflow rate set of the remote controller or with the H tap.

Note: 1.This control is different from connection of humidifier and it is used for humidifiers locally connected in North America.

2.External input ON is an input signal to the “X12A” terminal on the PCB (A3P).∗3. Refer to “2.4 Setting Contents and Code No. for Indoor Units” (P.103)

: Factory setting

&

&• Remote control operation = ON

(including thermostat OFF)• When the external input

changes from ON to OFF.

• Remote control operation = ON (including thermostat OFF)

• External input = ONFan X (∗3) tap operation (Same operation as with the airflow rate selected with the remote controller)

Fan residual operation for Y (∗3) seconds (The fan airflow rate is set with the X (∗3) tap.)

Mode No.

First Code No. Description of Setting

Second Code No.

01 02 03 04

14(24)

4 Setting of humidifier / air purifier fan tapRemote

controller setting

H tap — —

5 Humidifier residual operation time 30 seconds 60 seconds 120 seconds —



6.12.2 EconomizerWhen indoor and outdoor air temperatures are reversed, the compressor is stopped to let in the outdoor air to save energy.This operation is called economizer operation, and the equipment to detect indoor and outdoor air temperatures and open and close the damper to perform this operation is called an economizer.The economizer detects indoor and outdoor air temperatures, informs the air conditioner that the economizer operation is ready, and opens and closes the damper.The indoor unit stops the outdoor unit when it receives a signal from the economizer and performs air supply operation.When the indoor air temperature is cooled down sufficiently by the economizer operation, and it is no longer necessary (thermostat OFF), the indoor unit outputs a signal to the economizer to close the damper.

Note: ∗1. Thermostat ON signal: A signal to turn ON the indoor unit thermostat and allow the economizer to open the damper.It turns ON the relay on the “X8A side of X23A” on the PCB (A3P).

∗2. External input ON is an input signal to the “X11A” terminal on the PCB (A3P).∗3. To stop the compressor while the economizer is in operation to save energy.∗4. Remote control ON signal: Contact output which shows the operating status of the indoor unit.

This signal turns on the relay “on the opposite side of X8A of X23A” on the PCB (A3P).

6.12.3 Air Purifier (UV lamp)When an air purifier is connected onsite, the fan is operated with the airflow rate set of the remote controller or with the H tap.

Note: ∗1. External input ON is an input signal to the “X25A” terminal on the PCB (A3P).

&

Elimination of others

Remote control ON

Remote control OFF

&

Elimination of others

Normal operation

Stop Thermostat ON signal (∗1) to the economizer.

Stop indoor unit ON signal (∗4) to the economizer.

Transfer indoor unit ON signal (∗4) to the economizer.

Transfer Thermostat ON signal (∗1) to the economizer.

• Transfer the thermostat OFF state to the outdoor unit. (∗3)

• EV = 0 pulse• The remote controller indicates cooling

operation.• The fan tap follows the remote

controller.

• Cooling mode• When the thermostat is ON

• Cooling mode• When the thermostat is ON• External input = ON (∗2)

&Fan x tap operation (Same operation as with the airflow rate selected with the remote controller)

• Remote control operation (including thermostat OFF)

• External input = ON (∗1)


SiUS341504E

98 Field Settings

Part 5Field Settings

1. Test Operation ..........................................................................................991.1 Checks before Test Operation ................................................................... 991.2 Test Operation Checks............................................................................... 99

2. Field Setting from Remote Controller......................................................1002.1 Wired Remote Controller.......................................................................... 1002.2 Wireless Remote Controller ..................................................................... 1012.3 Simplified Remote Controller.................................................................... 1022.4 Setting Contents and Code No. for Indoor Units ...................................... 103

3. Field Setting from Outdoor Unit...............................................................1203.1 Accessing the BS Buttons on the Logic Board......................................... 1203.2 Operating the BS Buttons and DIP Switches on the Logic Board ............ 1213.3 Connecting of the Optional PC Configurator Cable to the

Outdoor Unit ............................................................................................. 1233.4 Monitoring Function and Field Settings .................................................... 1243.5 Cool / Heat Mode Changeover................................................................. 1303.6 Setting of Low Night Noise Operation and Demand Operation................ 131

4. Charging Refrigerant...............................................................................1364.1 Precautions .............................................................................................. 1364.2 Calculating the Additional Refrigerant Charge ......................................... 1364.3 Method for Adding Refrigerant ................................................................. 138

SiUS341504E Test Operation

1. Test Operation1.1 Checks before Test Operation

Before carrying out a test operation, proceed as follows:

1.2 Test Operation ChecksTo carry out a test operation, check the following:

Check that the temperature setting of the remote controller is at the lowest level in cooling mode or use test mode.Go through the following checklist:

Step Action1 Make sure the voltage at the primary side of the safety breaker is:

(230V or 460V) ± 10% for 3-phase units2 Fully open the liquid and the gas stop valve.

Checkpoints Cautions or warningsAre all units securely installed? Dangerous for turning over during storm

Possible damage to pipe connectionsIs the earth wire installed according to the applicable local standard?

Dangerous if electric leakage occurs

Are all air inlets and outlets of the indoor and outdoor units unobstructed?

Poor coolingPoor heating

Does the drain flow out smoothly? Water leakageIs piping adequately heat-insulated? Water leakageHave the connections been checked for gas leakage? Poor cooling

Poor heatingStop

Is the supply voltage conform to the specifications on the name plate?

Incorrect operation

Are the cable sizes as specified and according to local regulations?

Damage of cables

Are the remote controller signals received by the unit? No operation

Field Settings 99

Field Setting from Remote Controller SiUS341504E

2. Field Setting from Remote ControllerIndividual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the field setting in accordance with the following description.Wrong setting may cause error.(When optional accessory is mounted on the indoor unit, setting for the indoor unit may be required to change. Refer to information in the option handbook.)

2.1 Wired Remote Controller2.1.1 BRC1E73

, ,

<Basic screen>

(1)

<Service Settings menu screen>

(2)

Press Menu/OK button.

<Service Settings screen>

(3)(4)(5)

(3)(5)


FIRST CODE (SW) NO.

SECOND CODE NO.

Press and hold Cancel button for 4 seconds or more during backlight lit.

In the case of individual setting per indoor unit

In the case of group total setting

1. Press and hold Cancel button for 4 seconds or more.Service settings menu is displayed.

2. Select Field Settings in the Service Settings menu, and press Menu/OK button.Field settings screen is displayed.

3. Highlight the mode, and select desired “Mode No.” by using (Up/Down) button.

4. In the case of setting per indoor unit during group control (When Mode No. such as 20 , 21 , 22 , 23 , 25 are selected), highlight the unit No. and select “Indoor unit No.” to be set by using (Up/Down) button.(In the case of group total setting, this operation is not needed.)

In the case of individual setting per indoor unit, current settings are displayed. And, SECOND CODE NO. “ - ” means no function.

5. Highlight SECOND CODE NO. of the FIRST CODE NO. to be changed, and select desired “SECOND CODE NO.” by using (Up/Down) button. Multiple identical mode number settings are available.

In case of setting for all indoor units in the remote control group, available SECOND CODE NO. is displayed as “ ∗ ” which means it can be changed.When SECOND CODE NO. is displayed as “ - ”, there is no function.

100 Field Settings

SiUS341504E Field Setting from Remote Controller

2.2 Wireless Remote Controller

1. When in the normal mode, press the “ ” button for 4 seconds or more, and operation then enters the “field setting mode.”

2. Select the desired “mode No.” with the “ ” button.3. Pressing the “ ” button, select the first code No.4. Pressing the “ ” button, select the second code No.5. Press the timer “ ” button and check the settings.6. Press the “ ” button to return to the normal mode.

(Example)When setting the filter sign time to “Contamination Heavy” in all group unit setting, set the Mode No. to “10”, First code No. to “0” and second code No. to “02”.

NOTE

<Setting confirmation screen>

(6)(7)


Setting confirmation

6. Press Menu/OK button. Setting confirmation screen is displayed.

7. Select Yes and press Menu/OK button. Setting details are determined and field settings screen returns.

8. In the case of multiple setting

changes, repeat “(3)” to “(7)”.

9. After all setting changes are completed, press Cancel button twice.

10. Backlight goes out, and “Checking the connection.Please standby.” is displayed for initialization. After the initialization, the basic screen returns.

• Installation of optional accessories on the indoor unit may require changes to field settings.See the manual of the optional accessory.

• For field setting details related to the indoor unit, see installation manual shipped with the indoor unit.

MODE NO.

FIELD SETTING MODE

34

5

2

1, 6

SECOND CODE NO.

FIRST CODE NO.

Field Settings 101


2.3 Simplified Remote Controller

1. Remove the upper part of remote controller.2. When in the normal mode, press the [BS6] BUTTON () (field setting), and the FIELD SETTING MODE is

entered.3. Select the desired MODE No. with the [BS2] BUTTON () (temperature setting ) and the [BS3] BUTTON

() (temperature setting ).4. During group control, when setting by each indoor unit (mode No. 20, 22, and 23 have been selected), press

the [BS8] () BUTTON (unit No.) and select the INDOOR UNIT NO. to be set. (This operation is unnecessary when setting by group.)

5. Press the [BS9] BUTTON () (set A) and select FIRST CODE NO.6. Press the [BS10] BUTTON () (set B) and select SECOND CODE NO.7. Press the [BS7] BUTTON () (set/cancel) once and the present settings are SET.8. Press the [BS6] BUTTON () (field setting) to return to the NORMAL MODE.9. (Example) If during group setting and the time to clean air filter is set to FILTER CONTAMINATION - HEAVY,

SET MODE NO. to “10”, FIRST CODE NO. to “0”, and SECOND CODE NO. to “02”.

MODE NO.

UNIT NO.

FIRST CODE NO.

SECOND CODE NO.

3

3

8 2 7 4 5 6

102 Field Settings


2.4 Setting Contents and Code No. for Indoor Units : Factory setting

Mode No. (∗2)

First Code No.

Setting ContentsSecond Code No.

01 02 03 04

10(20)

0

Filter Sign Setting(Setting for display time to clean air filter)(Sets display time to clean air filter to half when there is heavy filter contamination.)

Ultra long life filter

Light

Approx. 10,000

hrs.

Heavy

Approx. 5,000 hrs.

— —Long life filterApprox. 2,500 hrs.

Approx. 1,250 hrs.

Standardfilter

Approx. 200 hrs.

Approx. 100 hrs.

0 (∗6) Filter Sign Setting Light Heavy — —1 Ultra Long Life Filter Sign Setting Long life filter Ultra long life filter — —

1 (∗6) Filter cleaning sign time (Light/Heavy) 2,500/1,250 10,000/5,000 — —

2 Selection of ThermistorRemote controller +

Suction air thermistor

Only suction air thermistor

Only remote controller thermistor

—

2 (∗6) Remote sensor and remote controller thermistor Both Only remote sensor thermistor

Only remote controller thermistor

—

3 "Filter Cleaning" Displayed or Not Displayed Display No display — —

6 Remote controller thermostat control during the group control

Remote controller thermostat control

is not permitted

Remote controller thermostat control

is permitted— —

7 Auxiliary electric heater ON/OFF temperature Refer to P.108 for detail.

11(21)

1 Auxiliary electric heater ON temperature: Ttson (∗8)

Refer to P.108 for detail.2 Auxiliary electric heater OFF temperature: Ttsoff

(∗8)3 Setting the airflow rate when heating Standard Slightly increased Increased —

6 Setting the rate of human detection High sensitivity Low sensitivity Standard sensitivity

Infrared presence sensor

disabled

7 Airflow adjustment OFF Completion of airflow adjustment

Start of airflow adjustment —

8 Compensating the temperature around human Suction air temperature only

Priorities given on the suction air temperature

StandardPriorities given

on the floor temperature

9 Compensating the floor temperature –4°C (–7.2°F) –2°C (–3.6°F) 0°C (0°F) +2°C (+3.6°F)

12(22)

0 Optional Output Switching(field selection of output for adaptor for wiring) Refer to P.110 for detail.

1External ON/OFF Input(Set when ON/OFF is to be controlled from outside.)

Refer to P.110 for detail.

2 Thermostat Switching(Set when remote sensor is to be used.) 1°C (1.8°F) 0.5°C (0.9°F) (∗7) — —

3 Airflow Setting when Heating Thermostat is OFF LL Set fan speed — —

4Setting of Operation Mode to "AUTO"(automatic temperature differential setting for VRV system Heat Recovery series cool/heat)

Refer to P.111 for detail.

5 Auto Restart after Power Failure Reset Not equipped Equipped — —6 Airflow when Cooling Thermostat is OFF LL Set fan speed — —

13(23)

0 Setting of Normal Airflow N H S —

1 Airflow Direction Setting(Set when a blocking pad kit has been installed.) F (4 directions) T (3 directions) W

(2 directions) —

2 Swing pattern settings(In case of an infrared floor sensor is installed)

All direction synchronized swing — Facing swing —

3 Operation of downward flow flap: Yes/No Equipped Not equipped — —

4 Setting of Airflow Direction Adjustment Range Draft prevention Standard Ceiling Soiling prevention —

5 Setting of the Static Pressure Selection Standard High static pressure — —6 External Static Pressure Settings Refer to P.113 for detail.

14(24)

4 (∗6) Setting of Humidifier / Air Purifier Fan Tap Remote controller setting H tap — —

5 (∗6) Residual Operation Time 30 seconds 60 seconds 120 seconds —

Field Settings 103


Note : 1. Settings are made simultaneously for the entire group, however, if you select the mode No. inside

parentheses, you can also set by each individual unit. Setting changes however cannot be checked except in the individual mode for those in parentheses.

∗2. The mode numbers inside parentheses cannot be used by wireless remote controllers, so they cannot be set individually. Setting changes also cannot be checked.

3. Do not make settings other than those described above. Nothing is displayed for functions the indoor unit is not equipped with.

4. “88” or “Checking the connection. Please stand by.” may be displayed to indicate the remote controller is resetting when returning to the normal mode.

∗5. If the setting mode to “Equipped”, energy recovery ventilator fan conducts the fan residual operation by linking to indoor unit.

∗6. Only for FXTQ∗7. For FXTQ: Factory setting is “02”.∗8.

Mode No. (∗2)

First Code No.


01 02 03 04

15(25)

1 Humidification when Heating Thermostat is OFF Not equipped Equipped — —

2

Setting of Direct Duct Connection(when the indoor unit and energy recovery ventilator unit are connected by duct directly.) (∗5)

Not equipped Equipped — —

3 Interlocked Operation between Humidifier and Drain Pump Not equipped Equipped — —

5 Individual Setting of Ventilation Not equipped Equipped — —1b (2b) 3 Display of Contact Center Displayed Not displayed — —

4 Display of error codes on the remote controller — Two-digit display — Four-digit display

12 Key-lock pattern settings No operation allowed (Cancel

procedure is displayed.)

No operation allowed (Cancel procedure is not

displayed.)

No menu operation is

allowed (Cancel

procedure is displayed.)

No menu operation is allowed any

time.

14 Setting "restricted / permitted" of airflow block Refer to P.115 for detail.

1c (2c) 0 Room temperature display Room temperature is not displayed

Room temperature is displayed — —

Set temperature

<Ttsoff><Ttson>

Thermostat OFF

Thermostat ON

104 Field Settings


2.4.1 Applicable Range of Field setting

∗1. Static pressure selection

Setting Modes

Ceiling mounted cassette type

Slim ceiling mounted duct type

Ceiling mounted duct type

Ceiling suspended type

Wall mounted type

Floor standing type

Concealed floor standing type

Air handling unit

4-way blow ceiling suspended cassette typeRound flow 4 way flow

FXFQ FXZQ FXDQ FXMQ FXHQ FXAQ FXLQ FXNQ FXTQ FXUQ

Filter sign √ √ √ √ √ √ √ √ √ √

Ultra long life filter sign √ √ — — — — — — √ —

Remote controller √ √ √ √ √ √ √ √ √ √

Set fan speed when thermostat OFF √ √ √ √ √ √ √ √ √ √

Airflow adjustment ceiling height √ — — — √ — — — — √

Airflow direction √ √ — — — — — — — √

Airflow direction adjustment (Down flow operation)

— — — — — — — — — —

Airflow direction adjustment range √ √ — — — — — — — —

Field setting fan speed selection √ — √∗1 √∗1 — — — — — —

Auxiliary electric heater ON/OFF temperature

√(FXFQ-T only) — — √ — — √ √ √ √

Field Settings 105


2.4.2 Detailed Explanation of Setting ModesFilter Sign Setting

If switching the filter sign ON time, set as given in the table below.

FXTQ

Ultra Long Life Filter Sign SettingWhen a Ultra long life filter is installed, the filter sign timer setting must be changed.

FXTQ

Selection of ThermistorSelect a thermistor to control room temperature.

When the unit is not equipped with an infrared floor sensor:

The factory setting for the Second Code No. is "01" and room temperature is controlled by the suction air thermistor and room temperature thermistor in remote controller.When the Second Code No. is set to "02", room temperature is controlled by the suction air thermistor.When the Second Code No. is set to "03", room temperature is controlled by the room temperature thermistor in remote controller.

Mode No. First Code No.

Second Code No.

Standard Filter

Long Life Filter

Ultra Long Life Filter Setting

10 (20) 001 200 hrs. 2,500 hrs. 10,000 hrs. Contamination Light

02 100 hrs. 1,250 hrs. 5,000 hrs. Contamination Heavy

Mode No. First Code No. Second Code No. Setting

10 (20) 001 Light

02 Heavy


10 (20) 101 Long Life Filter

02 Ultra Long Life Filter

Mode No. First Code No. Second Code No. Display time (Light/Heavy)

10 (20) 101 2,500/1,250

02 10,000/5,000

Mode No. First Code No. Second Code No. Thermistor that controls room temperature

10 (20) 2

01 Room temperature thermistor in remote controller and suction air thermistor for indoor unit

02 Suction air thermistor for indoor unit

03 Room temperature thermistor in remote controller

106 Field Settings


When the unit is equipped with an infrared floor sensor:

∗ Refer to "Compensating the temperature around human."Note that the control is automatically switched to the one performed only by the suction air thermistor for indoor unit when the Second code No. is "01" during the group control.To use the remote controller thermistor during the group control, select the Second code No. "02" in First code No. "6."

Mode No. First Code No. Second Code No. Note

10 (20) 601 The remote controller thermostat control is not permitted during the group control

02 The remote controller thermostat control is permitted during the group control

20

22

24

26

28

30

32

34

36

211917 23 25 27 29 31 33 35 37 (˚C)

(˚C)14

16

18

20

22

24

26

28

30

32

(˚C)

(˚C)

68

71.6

75.2

78.8

82.4

86

89.6

93.2

96.8

57.2

60.8

64.4

68

71.6

75.2

78.8

82.4

86

89.6

(˚F)

(˚F)

14 16 18 20 22 24 26 28 30 32 34

66.262.6 69.8 73.4 77 80.6 84.2 87.8 91.4 95 98.6 (˚F)

(˚F)57.2 60.8 64.4 68 71.6 75.2 78.8 82.4 86 89.6 93.2

In cooling

In heating











Remote controller thermistor




Set

tem

pera

ture

Set

tem

pera

ture

Mode No. Second Code No.

10 (20) 2 01 02 02 02 02 03

11 (21) 8 01 01 02 03 04 01

The thermistor to be used

Remote controller thermistor — — — —

Suction air thermistor —

Infrared floor sensor — — —

First Code No.

The infrared floor sensor is not used

Priorities given on the suction air temperature (∗)

Only the remote controller thermistor is used

Priorities given on the floor temperature (∗)

Only the suction air thermistor is used Standard setting

(Factory setting)

Field Settings 107


"Filter Cleaning" Displayed or Not Displayed Whether or not to display "Filter Cleaning" after operation of certain duration can be selected.

∗ "Filter Cleaning" is not displayed when an Auto-clean Panel is connected.

Auxiliary Electric Heater ON/OFF Temperature Setting

FXTQ, FXMQ-PB

There is a limitation of combination between Ttson and Ttsoff as below due to 2°C (3.6°F) hysteresis required for reliability. The combinations shown with N/A cannot be selected.

Mode No. First Code No. Second Code No. "Filter Cleaning" display

10 (20) 301 Display

02 No display

Mode No. First Code No. Symbol

Second Code No.

01 02 03 04 05 06

11 (21)1 <Ttson> –4°C

(–7.2°F)–3.5°C

(–6.3°F)–3°C

(–5.4°F)–2.5°C

(–4.5°F)–2°C

(–3.6°F)–1.5°C

(–2.7°F)

2 <Ttsoff> –2°C(–3.6°F)

–1.5°C(–2.7°F)

–1°C(–1.8°F)

–0.5°C(–0.9°F)

0°C(0°F)

0.5°C(0.9°F)

Set temperature

<Ttsoff><Ttson>

Thermostat OFF

Thermostat ON

Mode No. First Code No. Symbol

Second Code No.

01 02 03 04 05 06

10 (20) 7<Ttson> –4°C

(–7.2°F)–3.5°C

(–6.3°F)–3°C

(–5.4°F)–2.5°C

(–4.5°F)–2°C

(–3.6°F)–1.5°C

(–2.7°F)

<Ttsoff> –2°C(–3.6°F)

–1.5°C(–2.7°F)

–1°C(–1.8°F)

–0.5°C(–0.9°F)

0°C(0°F)

0.5°C(0.9°F)

Second Code No.

<Ttson>

01 02 03 04 05 06

–4°C(–7.2°F)

–3.5°C(–6.3°F)

–3°C(–5.4°F)

–2.5°C(–4.5°F)

–2°C(–3.6°F)

–1.5°C(–2.7°F)

<Tts

off>

06 0.5°C (0.9°F) √ √ √ √ √ √

05 0°C (0°F) √ √ √ √ √ N/A

04 –0.5°C (–0.9°F) √ √ √ √ N/A N/A

03 –1°C (–1.8°F) √ √ √ N/A N/A N/A

02 –1.5°C (–2.7°F) √ √ N/A N/A N/A N/A

01 –2°C (–3.6°F) √ N/A N/A N/A N/A N/A

108 Field Settings


Setting the Airflow Rate when HeatingThe fan revolution is changed to maintain the sufficient distance for warm air to reach during the heating operation. The setting should be changed depending on the installation condition of the unit.

Note that this setting is effective only during the heating operation.

Setting the Rate of Human Detection(For units with the infrared presence sensor only)

Set the sensitivity of the infrared presence sensor.• The infrared presence sensor can be disabled by selecting the Second code No. "04."

(Note) When the infrared presence sensor is disabled, the remote controller menu does not display some functions such as the automatic draft reduction, energy-saving operation in absence and halt in absence.

Airflow Adjustment (AUTO)External Static Pressure SettingsMake settings in either method (a) or method (b) as explained below.(a) Use the airflow auto adjustment function to make settings.

Airflow auto adjustment: The volume of discharge air is automatically adjusted to the rated quantity.(b) Select External Static Pressure with Remote Controller Check that 01 (OFF) is set for the “SECOND CODE No.”

in “MODE No. 21” for airflow adjustment on an indoor unit basis in Table 4. The “SECOND CODE No.” is set to 01 (OFF) at factory setting. Change the “SECOND CODE No.” as shown in table according to the external static pressure of the duct to be connected.

Compensating the Temperature around Human(When the unit is equipped with an infrared floor sensor)

Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around human.The temperature around human is calculated using the values of the suction air thermistor and the infrared floor sensor. The factory setting is "Normal" (the average value of the suction air temperature and the floor temperature is applied). However, the rate at which the suction air thermistor and the infrared floor sensor affect the temperature around human can be changed with this setting.• To reflect the effect of the temperature around the ceiling, select the "Priorities given on the suction air

temperature" (the Second code No. "02").• To reflect the effect of the temperature around the floor, select the "Priorities given on the floor temperature"

(the Second code No. "04").• The infrared floor sensor can be disabled by selecting "Suction air temperature only" (the Second code No.

"01").

Mode No. First Code No.Second Code No.

01 02 0311 (21) 3 Standard Slightly increased Increased

Mode No. First Code No. Second Code No. Contents

11(21) 6

01 High sensitivity02 Low sensitivity03 Standard sensitivity04 Infrared presence sensor disabled

Mode No. First Code No. Second Code No. Airflow Adjustment

11 (21) 701 OFF02 Completion of airflow adjustment03 Start of airflow adjustment


11 (21) 8

01 Suction air temperature only02 Priorities given on the suction air temperature03 Standard04 Priorities given on the floor temperature

Field Settings 109


Compensating the Floor Temperature(When the unit is equipped with an infrared floor sensor)

Offset the detected value of the infrared floor sensor with a certain temperature. This setting should be used to have the actual floor temperature detected when, for example, the unit is installed close to a wall.

[Actual procedure to use the setting]Although the standard setting is normally used with no problem, the setting should be changed in the following cases:

Optional Output SwitchingUsing this setting, "operation output signal" and "abnormal output signal" can be provided. Output signal is output between terminals X1 and X2 of "adaptor for wiring", an optional accessory.

External ON/OFF InputThis input is used for "ON/OFF operation" and "Protection device input" from the outside. The input is performed from the T1-T2 terminal of the operation terminal block in the electrical component box.


11 (21) 9

01 –4°C (–7.2°F)02 –2°C (–3.6°F)03 0°C (0°F)04 +2°C (+3.6°F)

Environment Operation Mode Problem Setting Value· The unit is installed close to a wall or a window.· High thermal capacity of the floor whose material is

concrete, etc.· There are many heat sources like a PC.· There is a non-negligible heat source such as floor

heating.

Heating

Heated too much +2°C (+3.6°F)

Heated little –2°C to –4°C(–3.6°F to –7.2°F)

Mode No. First Code No. Second Code No. Remarks

12 (22) 0

01 Indoor unit thermostat ON/OFF signal is provided.02 —

03 Output linked with "Start/Stop" of remote controller is provided.

04 In case of "Error Display" appears on the remote controller, output is provided.

05 —06 —

07 Only for FXMQ-PBEconomizer (field supply) ON/OFF signal is provided.

Mode No. First Code No. Second Code No. Operation by input of the signal A

12 (22) 1

01ON: Forced stop (prohibition of using the remote

controller)OFF: Permission of using the remote controller

02 OFF → ON: Permission of operationON → OFF: Stop

03

ON: OperationOFF: The system stops, then the applicable unit

indicates "A0". The other indoor units indicate "U9".

04 —

05Only for FXMQ-PBON: Economizer (field supply) is connected.OFF: Not connected

F2 T1 T2Forced stop

Input A

110 Field Settings


Thermostat SwitchingDifferential value during thermostat ON/OFF control can be changed.

Airflow Setting when Heating Thermostat is OFFThis setting is used to set airflow when heating thermostat is OFF.∗ When thermostat OFF airflow volume up mode is used, careful consideration is required before deciding

installation location.

Setting of Operation Mode to "AUTO"This setting makes it possible to change differential values for mode selection while in automatic operation mode.

The automatic operation mode setting is made by the use of the "Operation Mode Selector" button.

Auto Restart after Power Failure Reset

For the air conditioners with no setting for the function, the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main power supply is turned ON again after once turned OFF. However, for the air conditioners with the setting (same as factory setting), the units may start automatically after power failure reset or the main power supply turned ON again (return to the same operation condition as that of before power failure).

For the above reasons, when the unit is set enabling to utilize “Auto restart function after power failure reset”, utmost care should be paid for the occurrence of the following situation.

Airflow when Cooling Thermostat is OFFThis is used to set airflow to "LL airflow" when cooling thermostat is OFF.

Mode No. First Code No. Second Code No. Differential value

12(22) 201 1°C (1.8°F)

02 0.5°C (0.9°F)


12 (22) 301 LL airflow

02 Preset airflow

Mode No. First Code No.Second Code No.

01 02 03 04 05 06 07 08

12 (22) 4 0°C (0°F)

1°C (1.8°F)

2°C (3.6°F)

3°C (5.4°F)

4°C (7.2°F)

5°C (9.0°F)

6°C (10.8°F)

7°C (12.6°F)


12 (22) 501 Not equipped

02 Equipped

Caution 1. The air conditioner starts operation suddenly after power failure reset or the main power supply turned ON again. Consequently, the user might be surprised (with question for the reason why).

2. In the service work, for example, turning OFF the main power switch during the unit is in operation, and turning ON the switch again after the work is completed start the unit operation (the fan rotates).


12 (22) 601 LL airflow

02 Preset airflow

Field Settings 111


Setting of Normal AirflowMake the following setting according to the ceiling height. The second code No. is set to “01” at the factory.

In the Case of FXHQ, FXAQ

In the Case of FXFQ12~30

In the Case of FXFQ36

Airflow Direction SettingSet the airflow direction of indoor units as given in the table below. (Set when sealing material kit of air discharge outlet has been installed.) The second code No. is factory set to “01”.

Swing Pattern Settings(In case of a infrared floor sensor is installed)

Set the flap operation in swing mode.With the factory swing, flaps facing each other are synchronized to operate, and flaps placed side by side are set to swing in an opposite direction to agitate airflow to reduce temperature irregularity.Conventional swing operation (all direction synchronized swing) can be set onsite.


13 (23) 0

01 Standard (N)

02 Slight increase (H)

03 Normal increase (S)


Second Code No. Setting

Ceiling height

4-way Outlets 3-way Outlets 2-way Outlets

13 (23) 0

01 Standard (N)Lower than

2.7 m(8-29/32 ft)

Lower than3.0 m

(9-29/32 ft)

Lower than3.5 m

(11-1/2 ft)

02 High Ceiling (H)Lower than

3.0 m(9-29/32 ft)

Lower than3.3 m

(10-27/32 ft)

Lower than3.8 m

(12-15/32 ft)

03 Higher Ceiling (S)Lower than

3.5 m(11-1/2 ft)

Lower than3.5 m

(11-1/2 ft)—


Second Code No. Setting

Ceiling height

4-way Outlets 3-way Outlets 2-way Outlets

13 (23) 0

01 Standard (N)Lower than

3.2 m(10-1/2 ft)

Lower than3.6 m

(11-12/18 ft)

Lower than4.2 m

(13-25/32 ft)

02 High Ceiling (H)Lower than

3.6 m(11-12/18 ft)

Lower than4.0 m

(13-1/8 ft)

Lower than4.2 m

(13-25/32 ft)

03 Higher Ceiling (S)Lower than

4.2 m(13-25/32 ft)

Lower than4.2 m

(13-25/32 ft)—


13 (23) 1

01 F: 4-direction airflow

02 T: 3-direction airflow

03 W: 2-direction airflow


13 (23) 2

01 All direction synchronized swing

02 —

03 Facing swing

112 Field Settings


Setting of Airflow Direction Adjustment RangeMake the following airflow direction setting according to the respective purpose.

∗Some indoor unit models are not equipped with draft prevention (upward) function.

Setting of the Static Pressure Selection (for FXDQ model)

External Static Pressure Settings (for FXMQ model)

The “Second Code No.” is set to 07 (an external static pressure of 100 Pa (0.40 inH2O)) at factory setting.∗1. FXMQ15 · 18 · 24 · 30 · 36 · 48PB cannot be set to 30 Pa (0.12 inH2O).∗2. FXMQ07 · 09 · 12PB cannot be set to 110 ~ 200 Pa (0.44 ~ 0.80 inH2O).∗3. FXMQ54PB cannot be set to 30 Pa (0.12 inH2O) or 150 ~ 200 Pa (0.60 ~ 0.80 inH2O).

Setting of Humidifier / Air Purifier Fan Tap (for FXTQ model)

Residual Operation Time (for FXTQ model)


13 (23) 4

01 Upward (Draft prevention)

02 Standard

03 Downward (Ceiling soiling prevention)

Model No. First Code No. Second Code No. External static pressure

13 (23) 5

01 Standard (FXDQ07-12: 10 Pa (0.04 inH2O), FXDQ18·24: 30 Pa (0.12 inH2O))

02High static pressure

(FXDQ07-12: 15 Pa (0.06 inH2O),FXDQ18·24: 45 Pa (0.18 inH2O))

Mode No. First Code No. Second Code No. External Static Pressure

13 (23) 6

01 30 Pa (0.12 inH2O) (∗1) (∗3)

02 50 Pa (0.20 inH2O)

03 60 Pa (0.24 inH2O)

04 70 Pa (0.28 inH2O)

05 80 Pa (0.32 inH2O)

06 90 Pa (0.36 inH2O)

07 100 Pa (0.40 inH2O)

08 110 Pa (0.44 inH2O) (∗2)

09 120 Pa (0.48 inH2O) (∗2)

10 130 Pa (0.52 inH2O) (∗2)

11 140 Pa (0.56 inH2O) (∗2)

12 150 Pa (0.60 inH2O) (∗2) (∗3)

13 160 Pa (0.64 inH2O) (∗2) (∗3)

14 180 Pa (0.72 inH2O) (∗2) (∗3)

15 200 Pa (0.80 inH2O) (∗2) (∗3)


14 (24) 401 Remote controller setting

02 H tap


14 (24) 501 30 seconds02 60 seconds03 120 seconds

Field Settings 113


Humidification when Heating Thermostat is OFFSetting to "Humidification Setting" turns ON the humidifier if suction air temperature is 20°C (68°F) or above and turns OFF the humidifier if suction air temperature is 18°C (64.4°F) or below when the heating thermostat is OFF.

Setting of Direct Duct ConnectionThis is used when "fresh air intake kit equipped with fan" is connected. The indoor fan carries out residual operation for one minute after the thermostat is stopped. (For the purpose of preventing dust on the air filter from falling off.)

Interlocked Operation between Humidifier and Drain PumpThis is used to interlock the humidifier with the drain pump. When water is drained out of the unit, this setting is unnecessary.

Individual Setting of VentilationThis is set to perform individual operation of Energy recovery ventilator using the remote controller/central unit when Energy recovery ventilator is built in.(Switch only when Energy recovery ventilator is built in.)

Display of Contact Center (For BRC1E73 only)You can turn OFF the display of "DAIKIN Contact Center" as "Contact for Service Display."

Display of Error Codes on the Remote Controller (For BRC1E73 only)Error code (four digits) is displayed for limited products.Select two-digit display if four-digit display is not preferred.



02 Setting of humidifier


15 (25) 201 Without direct duct connection

02 With direct duct connection equipped with fan


15 (25) 301 Individual operation of humidifier

02 Interlocked operation between humidifier and drain pump



02 Individual operation of ventilation


1b (2b) 301 Displayed

02 Not displayed


1b (2b) 402 Two-digit display

04 Four-digit display

114 Field Settings


Key-lock Pattern Settings (For BRC1E73 only)Setting of key-lock pattern for the remote controller

∗ When the Second code No. is set to "04," no menu operation is allowed without key-lock by pressing and holding the menu button. Set the Second code No. to other than "4" to cancel it.

Setting "Restricted / Permitted" of Airflow Block (For Sensing flow type only)Due to possibility of dew condensation, the airflow block function cannot be enabled when closure material kit, fresh air intake kit, natural / separately installed evaporation humidifier, or branch air duct.This setting will prevent the airflow bock is advertently set to ON.Ensure that this setting is "Disable airflow block" when using together with options listed above.

Room Temperature Display (For BRC1E73 only)A "Detailed display screen" can be selected as the display screen. This setting is used if you do not want to display "Room temperature display" on the "Detailed display screen."


1b (2b) 12

01 No operation allowed (Cancel procedure is displayed.)

02 No operation allowed (Cancel procedure is not displayed.)

03 No menu operation is allowed.

04 No menu operation is allowed any time.


1b (2b) 14

01 Airflow block permitted

02 —

03 —

04 —

05 Airflow block restricted


1c (2c) 001 Room temperature is not displayed.

02 Room temperature is displayed.

Field Settings 115


2.4.3 Centralized Control Group No. SettingBRC1E Type

In order to conduct the centralized remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.Make Group No. settings for centralized remote control using the operating remote controller.

Note:For wireless remote controller, see the following.For setting group No. of Energy recovery ventilator and wiring adaptor for other air conditioners, etc., refer to the installation manual attached.

NOTICEEnter the group No. and installation place of the indoor unit into the attached installation table. Be sure to keep the installation table with the operation manual for maintenance.

(1) <Basic screen>

1. Press and hold Cancel button for 4 seconds or more.Service Settings menu in displayed.

(2) <Service Settings menu screen>

2. Select , and press Menu/OK button.

Group Address screen is displayed.

(3) <Group Address>

3. Select Group Address (Group), and press Menu/OK button.Group Address (Group) screen is displayed.

(3) <Group Address (Group)>

4. Select the group No. by using (Up/Down) button.Press Menu/OK button.

Group Address

116 Field Settings


BRC7C Type / BRC7E Type / BRC4C TypeGroup No. setting by wireless remote controller for centralized control

1. When in the normal mode, press “ ” button for 4 seconds or more, and operation then enters the “field setting mode.”

2. Set mode No. “00” with “ ” button. 3. Set the group No. for each group with “ ” “ ” button (advance/backward).

4. Enter the selected group numbers by pressing “ ” button. 5. Press “ ” button and return to the normal mode.

Group No. Setting Example

CautionWhen turning the power supply ON, the unit may often not accept any operation while “88” is displaying after all indications were displayed once for about 1 minute on the liquid crystal display. This is not an operative fault.

MODE No.

FIELD SETTING MODE3

4

GROUP No.

2

1, 5

Central Remote Controller

F1 F2

F1 F2 F1 F2F1 F2

P1 P2

RC

RC

RC RC RC

F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2

F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2

No Remote Controller1-03

1-001-01

Main Sub1-02

1-04

Indoor/Outdoor Outdoor/Outdoor

F1 F2 F1 F2

Indoor/Outdoor Outdoor/Outdoor

Group Control by Remote Controller (Automatic unit address)

Field Settings 117


2.4.4 Outdoor-Air Processing Unit - Field Setting (Remote Controller): Factory setting

2.4.5 Setting of Operation Control Mode from Remote Controller (Field Setting)The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote controller. Furthermore, operations such as remote controller ON/OFF can be limited in accordance with the combination conditions. (Refer to information in the next page.)Central remote controller is normally available for operations. (Except when centralized monitor is connected)

2.4.6 Contents of Control Modes20 modes consisting of combinations of the following 5 operation modes with temperature and operation mode setting by remote controller can be set and displayed by operation modes 0 through 19.

ON/OFF control impossible by remote controllerUsed when you want to turn ON/OFF by central remote controller only.(Cannot be turned ON/OFF by remote controller.)OFF control only possible by remote controllerUsed when you want to turn ON by central remote controller only, and OFF by remote controller only.CentralizedUsed when you want to turn ON by central remote controller only, and turn ON/OFF freely by remote controller during set time.IndividualUsed when you want to turn ON/OFF by both central remote controller and remote controller.Timer operation possible by remote controllerUsed when you want to turn ON/OFF by remote controller during set time and you do not want to start operation by central remote controller when time of system start is programmed.

Mode No.

First Code No.


01 02 03 04 05 06 07 08 09 10 11 12 13 14 15

10 (20)

0 Filter contamination 2500 hr 1250 hr — — — — — — — — — — — — —

3Display time to clean air filter calculation

Display No display — — — — — — — — — — — — —

12 (22)

1 External ON/OFF input

Forced OFF

ON/OFF control — — — — — — — — — — — — —

5 Power failure automatic reset

Not equipped Equipped — — — — — — — — — — — — —

14 (24) 3

Discharge pipe temperature (cooling)

°C 13 14 15 16 17 18 19 20 21 22 23 24 25 25 25

°F 55.4 57.2 59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 77 77

118 Field Settings


How to Select Operation ModeWhether operation by remote controller will be possible or not for turning ON/OFF, controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below.

: Factory setting

Do not select “timer operation possible by remote controller” if not using a remote controller. Operation by timer is impossible in this case.

ON by remote controller (Unified ON by central remote controller)

OFF by remote controller (Unified OFF by central remote controller)

Temperature control by remote controller

Operation mode setting by remote controller

OFF by remote controller

Example

↓Rejection

↓Rejection

↓Rejection

↓Acceptance

↓Acceptance

Control mode is "1".

Control mode

Control by remote controller

Control mode

Operation

OFF Temperature control

Operation mode setting

Unified operation, individual operation by central remote controller, or operation controlled by timer

Unified OFF, individual stop by central remote controller, or timer stop

ON/OFF control impossible by remote controller

Rejection (Example)

Rejection (Example)

Rejection (Example)

RejectionAcceptance 0

Rejection 10

Acceptance (Example)

Acceptance (Example) 1 (Example)

Rejection 11

OFF control only possible by remote controller

Acceptance


Rejection 12

AcceptanceAcceptance 3

Rejection 13

Centralized

Acceptance


Rejection 14


Rejection 15

Individual Acceptance


Rejection 16


Rejection 17

Timer operation possible by remote controller

Acceptance(During timer at ON position only)

Rejection(During timer at OFF position only)


Rejection 18


Rejection 19

Local remote controllers cannot set temperature or operation mode when the system is under centralized control and "CENTRAL CONTROL" is displayed on the screen.

Field Settings 119

Field Setting from Outdoor Unit SiUS341504E

3. Field Setting from Outdoor UnitTo continue the configuration of the VRV IV heat recovery system, it is required to give some input to the logic board of the unit. This chapter will describe how manual input is possible by operating the BS buttons/DIP switches on the logic board and reading the feedback from the 7 segment displays.For VRV IV heat recovery system it is alternatively possible to make several commissioning field setting through a personal computer interface (for this, option EKPCCAB1 is required). The installer can prepare the configuration (off-site) on PC and afterwards upload the configuration to the system.

3.1 Accessing the BS Buttons on the Logic BoardIt is not required to open the complete electronic component box to access the BS buttons on the logic board and read out the 7 segment display(s).To access you can remove the front plate (see figure). Now you can open the inspection cover of the electrical component box front plate (see figure). You can see the three BS buttons and the three 7 segment displays and DIP switches.

Operate the switches and BS buttons with an insulated stick (such as a closed ball-point pen) to avoid touching of live parts.

Location of the segment displays, buttons and DIP switches:

1

32

1 Front plate2 Inspection cover3 Main PCB with 3sevensegmentdisplay and 3 BS

buttons

1 2

BS1BS2 DS1 DS2BS3

X27A

1 7segment displays (3x)2 BS buttons

BS1 MODE for changing the set mode BS2 SET for field settingBS3 RETURN for field setting DS1, DS2 DIP switches

120 Field Settings

SiUS341504E Field Setting from Outdoor Unit

3.2 Operating the BS Buttons and DIP Switches on the Logic Board

Operating the BS buttonsBy operating the BS buttons it is possible to:• Perform special actions (testrun, etc).• Perform field settings (demand operation, low noise, etc).

Below procedure explains how to operate the BS buttons to reach the required mode in the menu, select the correct setting and modify the value of the setting. This procedure can be used any time special settings and regular field setting are discussed in this manual.

Setting definition: [A-B] = C; A = mode; B = setting; C = setting value. A, B and C are numerical values for field settings. Parameter C has to be defined. It can be a chosen from a set (0, 1, 2, 3, 4, 5, …) or regarded as an ON/OFF (1 or 0) depending on the contents. This is informed when the field setting is explained.

Functions of the BS button switches which are located on the outdoor unit PCB (A1P)Turn ON the power supply of the outdoor unit and all indoor units.When the communication between indoor units and outdoor unit(s) is established and normal, the segment indication state will be as below (default situation when shipped from factory).

When turning ON the power supply: flashing as indicated. First checks on power supply are executed (1 ~ 2 minutes).

When no trouble occurs: lighted as indicated (8 ~ 10 minutes).

Ready for operation: blank display indication as indicated.

Segment display indications:

When above situation cannot be confirmed after 12 minutes, the error code can be checked on the indoor unit user interface and the outdoor unit segment display. Solve the error code accordingly. The communication wiring should be checked at first.

INFORMATION During special operation (e.g., test run, etc.) or when an error happened, information will contain letters and numerical values.

OffBlinkingOn

INFORMATION During special operation (e.g., test run, etc.) or when an error happened, information will contain letters and numerical values.

Field Settings 121


Accessing modesBS1 is used to change the mode you want to access.• Access mode 1Press BS1 once. Segment indication changes to:

• Access mode 2Press BS1 for at least 5 seconds. Segment indication changes to:

Mode 1Mode 1 is used to set basic settings and to monitor the status of the unit.• Changing and access the setting in mode 1:

Once mode1 is selected (press BS1 once), you can select the wanted setting. It is done by pushing BS2. Accessing the selected setting's value is done by pressing BS3 once.

• To quit and return to the initial status, press BS1.Example:Checking the content of parameter [1-10] (to know how many indoor units are connected to the system).[A-B] = C in this case defined as: A = 1; B = 10; C = the value we want to know/monitor:• Make sure the segment indication is as during normal operation (default situation when shipped from factory).• Press BS1 once; result segment display:

• Press BS2 10 times; result segment display:

• Press BS3 1 time; the value which is returned (depending on the actual field situation), is the amount of indoor units which are connected to the system.Result: mode1 setting 10 is addressed and selected, return value is monitored information

• To leave the monitoring function, press BS1 once, you will return to the default situation when shipped from factory.

Mode 2Mode 2 is used to set field settings of the outdoor unit and system.• Changing and access the setting in mode 2:

Once mode 2 is selected (press BS1 for more than 5 seconds), you can select the wanted setting. It is done by pressing BS2.Accessing the selected setting's value is done by pressing BS3 once.

• To quit and return to the initial status, press BS1.• Changing the value of the selected setting in mode 2:

- Once mode 2 is selected (press BS1 for more than 5 seconds) you can select the wanted setting. It is done by pressing BS2.

- Accessing the selected setting's value is done by pressing BS3 once.- Now BS2 is used to select the required value of the selected setting.- When the required value is selected, you can define the change of value by pressing BS3 once.- Press BS3 again to start operation according to the chosen value.

INFORMATION If you get confused in the middle of the process, press BS1.Then it returns to idle situation (no indication on segment displays: blank)

Result: mode 1 is accessed.

Result: mode 1 setting 10 is addressed.

122 Field Settings


Example:Checking the content of parameter [2-18] (to define the high static pressure setting of the outdoor unit's fan).[A-B] = C in this case defined as: A = 2; B = 18; C = the value we want to know/change• Make sure the segment indication is as during normal operation (default situation when shipped from factory).• Press BS1 for over 5 seconds; result segment display:

• Press BS2 18 times; result segment display:

• Press BS3 once; the value which is returned (depending on the actual field situation), is the status of thesetting. In the case of [2-18], default value is "0", which means the function is not active.Result: mode2 setting 18 is addressed and selected, return value is the current setting situation.

• To change the value of the setting, press BS2 till the required value appears on the segment indication. Whenachieved, define the setting value by pressing BS3 once. To start operation according to the chosen setting,confirm again by pressing BS3.

• To leave the monitoring function, press BS1 2 times, you will return to the default situation when shipped fromfactory.

Operating the DIP switchesBy operating the DIP switches it is possible to:

Result: mode 2 is accessed.

Result: mode 2 setting 18 is addressed.

What to do with DIP switch DS1

2-4 NOT USEDDO NOT CHANGE THE FACTORY SETTING

What to do with DIP switch DS2

1-4 NOT USEDDO NOT CHANGE THE FACTORY SETTING

Field Settings 123


3.4 Monitoring Function and Field SettingsThe operation of the outdoor unit can further be defined by changing some field settings. Next to making field settings it is also possible to confirm the current operation parameters of the unit. The setting can also be performed via the PC configuration software.Below relevant Monitoring mode (mode 1) and Field setting mode (mode 2) settings are explained in detail.

Making settings is done via the master outdoor unit.

3.4.1 Mode 1Mode 1 can be used to monitor the current situation of the outdoor unit. Some field setting contents can be monitored as well.

Below the settings in mode 1 are explained.

[1-0] = shows whether the unit you check is a master, slave 1 or slave 2 unit• No indication = undefined situation• 0 = outdoor unit is master unit• 1 = outdoor unit is slave 1 unit• 2 = outdoor unit is slave 2 unitMaster, slave 1 and slave 2 indications are relevant in multiple outdoor unit system configurations. The allocation of which outdoor unit is master, slave 1 or slave 2 are decided by the unit’s logic.The master unit should be used to input field settings in mode 2.

[1-1] = shows the status of low night noise operation• 1 = unit is currently operating under low noise restrictions• 0 = unit is currently not operating under low noise restrictions

Low night noise operation reduces the sound generated by the unit compared to nominal operating conditions.

Low night noise operation can be set in mode 2. There are two methods to activate low night noise operation of the outdoor unit system.

The first method is to enable an automatic low night noise operation during night time by field setting.The unit will operate at the selected low noise level during the selected time frames.

The second method is to enable low night noise operation based on an external input. For this operation an optional accessory is required.

[1-2] = shows the status of power consumption limitation operation• 1 = unit is currently operating under power consumption limitation• 0 = unit is currently not operating under power consumption limitations

Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions.Power consumption limitation can be set in mode 2.There are two methods to activate power consumption limitation of the outdoor unit system.

The first method is to enable a forced power consumption limitation by field setting. The unit will always operate at the selected power consumption limitation.The second method is to enable power consumption limitation based on an external input. For this operation an optional accessory is required.

124 Field Settings


[1-5] = shows the current T target parameter position.[1-6] = shows the current T target parameter position

[1-10] =shows the total number of connected indoor unitsIt can be convenient to check if the total number of indoor units which are installed match the total number of indoor units which are recognized by the system. In case there is a mismatch, It is advised to check the communication wiring path between outdoor and indoor units (F1/F2 communication line).

[1-13] =shows the total number of connected outdoor units (in case of multiple outdoor system).It can be convenient to check if the total number of outdoor units which are installed matches the total number of outdoor units which are recognized by the system. In case there is a mismatch, It is advised to check the communication wiring path between outdoor and outdoor units (Q1/Q2 communication line).

[1-17] =shows the latest error code.

[1-18] =shows the error code which occurred 1 time before current error code.

[1-19] = shows the error code which occurred 2 time before current error code.

When the latest error codes were reset by accident on an indoor unit user interface, they can be checked again through this monitoring settings. Detailed information about error codes can be consulted in the service manual of this unit.

[1-40] =shows the current cooling comfort setting.

[1-41] =shows the current heating comfort setting.

3.4.2 Mode 2Mode 2 is used to change the field settings of the system. Consulting the current field setting value and changing the current field setting value is possible.In general, normal operation can be resumed without special intervention after changing field settings.Some field settings are used for special operation (e.g., 1 time operation, recovery/vacuuming setting, manual adding refrigerant setting, etc.). In such a case, it is required to abort the special operation before normal operation can restart. It will be indicated in below explanations.

[2-8]: Te target temperature during cooling operation

[2-9]: Tc target temperature during heating operation

Value[2-8] Te target

0 (default) Auto

2 6°C (42.8°F)

3 7°C (44.6°F)

4 8°C (46.4°F)

5 9°C (48.2°F)

6 10°C (50°F)

7 11°C (51.8°F)

Value[2-9] Tc target

0 (default) Auto

1 41°C (105.8°F)

3 43°C (109.4°F)

6 46°C (114.8°F)

Field Settings 125


[2-12]: Enable the low night noise function and/or power consumption limitation via external control adaptor (DTA104A61/62)If the system needs to be running under low night noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed. This setting will only be effective when the optional external control adaptor (DTA104A61/62) is installed.

Default value: 0To activate this function: 1

[2-18]: Fan high static pressure setting In order to increase the static pressure the outdoor unit fan is delivering, this setting should be activated. For details about this setting, see technical specifications.


[2-20]: Manual additional refrigerant charge In order to add the additional refrigerant charge amount in a manual way (without automatic refrigerant charging functionality), following setting should be applied.Refer to Method for Adding Refrigerant on P.138 for further instructions regarding the different ways to charge additional refrigerant.


To stop the manual additional refrigerant charge operation (when the required additional refrigerant amount is charged), press BS3. If this function was not aborted by pressing BS3, the unit will stop its operation after 30 minutes.If 30 minutes was not sufficient to add the needed refrigerant amount, the function can be reactivated by changing the field setting again.

[2-21]: Refrigerant recovery/vacuuming mode In order to achieve a free pathway to reclaim refrigerant out of the system or to remove residual substances or to vacuum the system it is necessary to apply a setting which will open required valves in the refrigerant circuit so the reclaim of refrigerant or vacuuming process can be done properly.


To stop the refrigerant recovery/vacuuming mode, press BS3. If BS3 is not pressed, the system will remain in refrigerant recovery/vacuuming mode.

[2-22]: Automatic low night noise setting and level during night time By changing this setting, you activate the automatic low night noise operation function of the unit and define the level of operation. Depending on the chosen level, the noise level will be lowered (3: Level 3 < 2: Level 2 < 1: Level 1).The start and stop moments for this function are defined under setting [2-26] and [2-27].

Default value: 0To activate this function: 1, 2, or 3

126 Field Settings


[2-25]: Low night noise operation level via the external control adaptor If the system needs to be running under low night noise operation conditions when an external signal is sent to the unit, this setting defines the level of low night noise that will be applied (3: Level 3 < 2: Level 2 < 1: Level 1).This setting will only be effective when the optional external control adaptor (DTA104A61/62) is installed and the setting [2-12] was activated.

Default value: 2To activate this function: 1, 2, or 3

[2-26]: Low night noise operation start time

This setting is used in conjunction with setting [2-22].

[2-27]: Low night noise operation stop time


[2-30]: Power consumption limitation level (step 1) via the external control adaptor (DTA104A61/62)If the system needs to be running under power consumption limitation conditions when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied for step 1. The level is according to the table.

[2-31]: Power consumption limitation level (step 2) via the external control adaptor (DTA104A61/62)If the system needs to be running under power consumption limitation conditions when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied for step 2. The level is according to the table.

Value[2-26]

Start time automatic low night noise operation (approximately)

1 20:00

2 (default) 22:00

3 24:00

Value[2-27]

Start time automatic low night noise operation (approximately)

1 6:00

2 7:00

3 (default) 8:00

Value[2-30]

Power consumption limitation (approximately)

1 60%

2 65%

3 (default) 70%

4 75%

5 80%

6 85%

7 90%

8 95%

Value[2-31]

Power consumption limitation (approximately)

1 (default) 40%

2 50%

3 55%

Field Settings 127


[2-32]: Forced, all time, power consumption limitation operation (no external control adaptor is required to perform power consumption limitation)If the system always needs to be running under power consumption limitation conditions, this setting activates and defines the level power consumption limitation that will be applied continuously. The level is according to the table.

[2-34]: Indoor unit fan tap settingIndoor units fan speed limitation related to connection capacity and outdoor air temperature for energy saving.

∗ Indoor condition A: 1.7°C (–3°F) < Indoor air temperature – set temperature < 3°C (5.4°F)∗ Indoor condition B: 1.7°C (–3°F) ≥ Indoor air temperature – set temperature, or ≥ 3°C (5.4°F)

Value[2-32] Restriction reference

0 (default) Function not active

1 Follows [2-30] setting

2 Follows [2-31] setting

Value[2-34] Indoor unit fan tap setting

0 (default) Fan speed is limited to L tap when indoor units capacity ≥ 130%.

1 In heating mode, fan speed is limited to L tap when indoor units capacity ≥ 130%.

2Fan speed follows a setting of the remote controller (not limited by indoor units connection capacity).

3

Fan speed is limited to L tap when outdoor air temperature goes down to below 29.5°C (85.1°F) and indoor condition A (∗). It returns to remote controller setting when outdoor air temperature goes up to over 32.5°C (90.5 °F) or indoor condition B (∗).

4

Fan speed is limited to L tap when outdoor air temperature goes down to below 23.5°C (74.3°F) and indoor condition A (∗). It returns to remote controller setting when outdoor air temperature goes up to over 26.5°C (79.7°F) or indoor condition B (∗).

5

Fan speed is limited to L tap when outdoor air temperature goes down to below 19.3°C (66.7°F) and indoor condition A (∗). It returns to remote controller setting when outdoor air temperature goes up to over 22.3°C (72.1°F) or indoor condition B (∗).

6

Fan speed is limited to L tap when outdoor air temperature goes down to below 29.5°C (85.1°F). It returns to remote controller setting when outdoor air temperature goes up to over 32.5°C (90.5°F).

7


8


128 Field Settings


[2-35]: Height difference settingDefault value: 1In case the outdoor unit is installed in the lowest position (indoor units are installed on a higher position than outdoor units) and the height difference between the highest indoor unit and the outdoor unit exceeds 40 m (131 ft), the setting [2-35] should be changed to 0.

[2-45]: Technical cooling

[2-47]: Te target temperature during heat recovery operation

[2-49]: Max. level difference settingIn case the outdoor location is higher than indoor, extension is possible up till 90 m (295 ft), Refer to [2-49] for dedicated setting.

[2-81]: Cooling comfort setting


[2-82]: Heating comfort setting


[2-45] Description

0 (default) No technical cooling available

1 Technical cooling available

Value[2-47] Te target

0 (default) Auto

2 6°C (42.8°F)

3 7°C (44.6°F)

4 8°C (46.4°F)

5 9°C (48.2°F)

6 10°C (50°F)

7 11°C (51.8°F)

Value[2-49] Max. level difference setting

0 (default) OFF

1 ON

Value[2-81] Cooling comfort setting

0 Eco

1 (default) Mild

2 Quick

3 Powerful

Value[2-82] Heating comfort setting

0 Eco

1 (default) Mild

2 Quick

3 Powerful

Field Settings 129


3.5 Cool / Heat Mode ChangeoverSet Cool/Heat Separately for Each Branch Selector Unit by Cool/Heat Selector.

Set remote controller changeover switch (SS1, SS2) as following:• When using COOL/HEAT selector, turn this switch to the BS side.

When using cool/heat selector, connect to the terminal A, B and C on the EC of the electrical component box.

EXAMPLE OF TRANSMISSION LINE CONNECTION• Example of connecting transmission wiring.

Connect the transmission wirings as shown in the figure below.

SS2SS1

This setting must be completed before turning power supply ON.

NOTE: 1

2

1

2

F2

B

C

A

F2 F1F1 F2F1

Outdoor unit

TO IN/D UNIT TO OUT/D UNITF1 F2

F1 F2 F1 F2

F1 F2

IN/D OUT/D.BS

RE

MO

TE

CO

NT

RO

LLER

Branch Selector unit A

F1 F2 F1 F2

IN/D OUT/D.BS

Branch Selector unit B

COOL/HEATselector

Branch wiring

Use 2-core wires.(There is no polarity.)

B

C

ARE

MO

TE

CO

NT

RO

LLER

COOL/HEATselector

Cool/heat selector remote control wiring

Use 3-core wires.(Keep in mind the polarity.)

F1 F2 F1 F2

IN/D OUT/D.BS

B

C

ARE

MO

TE

CO

NT

RO

LLER

Final Branch Selector unit

Indoor unit for cooling

F2F1 COOL/HEATselector

F2F1

F2F1

F1 F2F1 F2 F1 F2

IN/D OUT/D.BS F1 F2

F1 F2OUT/D.BS

To the indoor unit where the selection of heating and cooling is available.

In case of the indoor unit connect as the cooling only unit, it wire the terminal of the last Branch Selector unit.

Cooling Only

1st unit Final unit

Final Branch Selector unit

130 Field Settings


3.6 Setting of Low Night Noise Operation and Demand Operation

Setting of Low Night Noise OperationBy connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise.

A. When the low night noise operation is carried out by external contact (with the use of the external control adaptor for outdoor unit)

1. Connect external control adaptor for outdoor unit and short circuit terminal of low night noise operation. If carrying out demand or low noise input, connect the adaptor’s terminals as shown below.

2. While in "Setting mode 2", set the setting condition for set item No. 12 (Setting of external low noise/demand operation) to "YES".

3. If necessary, while in "Setting mode 2", select the setting condition (i.e., "Level 1", "Level 2", or "Level 3") for set item No. 25 (Setting of external low noise level).

4. If necessary, while in "Setting mode 2", set the setting condition for the set item No. 29 (Setting of capacity priority) to "ON".(If the condition is set to "ON", when the air conditioning load reaches a high level, the low night noise operation command will be ignored to put the system into normal operation mode.)

B. When the low night noise operation is carried out automatically at night (The external control adaptor for outdoor unit is not required)

1. While in "Setting mode 2", select the setting condition (i.e., "Level 1", "Level 2", or "Level 3") for set item No. 22 (Setting of low night noise operation level).

2. If necessary, while in "Setting mode 2", select the setting condition (i.e., "20:00", "22:00", or "24:00") for set item No. 26 (Setting of start time of low night noise operation).(Use the start time as a guide since it is estimated according to outdoor temperatures.)

3. If necessary, while in "Setting mode 2", select the setting condition (i.e., "06:00", "07:00", or "08:00") for set item No. 27 (Setting of end time of low night noise operation).(Use the end time as a guide since it is estimated according to outdoor temperatures.)

4. If necessary, while in "Setting mode 2", set the setting condition for set item No. 29 (Setting of capacity priority) to "ON".(If the condition is set to "ON", when the air conditioning load reaches a high level, the system will be put into normal operation mode even during night-time.)

Setting Content

Level 1 Set the outdoor unit fan to Step 6 or lower.



X

X

X

X

X X X X X X

1 2 3 CDemand

Low noise

Outside wiring indicated by dotted line

External control adaptor for outdoor unit

Host computer monitor panel or demand controller

F1

F2

P3

P4

F1

F2

P3

P4

Field Settings 131


Image of operation in the case of A

Image of operation in the case of B

Image of operation in the case of A and B

Operation sound

Rated operationsoundOperation sound ofmode 1Operation sound ofmode 2Operation sound ofmode 3

Approx. 55 db (target)(The power consumption may be increased by about 10%)Approx. 50 db (target)(The power consumption may be increased by about 20%)

Approx. 45 db (target)(The power consumption may be increased by about 30%)

If capacity priority is set in "Capacity priority setting", the fan speed will be increased according to the load of air conditioning when load is heavier.

Low noise mode instructing

Operation sound level set with "External low noise operation setting"

Operation sound during low noise mode is instructed can be set with "External low noise level setting"(Factory setting is "Mode 2".)

Note 1: Above values are reference only (measured in silent room)Note 2: Above values are for 1 module only.

Operation sound

Rated operationsoundOperation sound of mode 1Operation sound of mode 2Operation sound of mode 3


Operation sound level set with "Low night noise operation setting"

Operation sound during low night noise mode is instructed can be set with "Low night noise level setting".(Factory setting is "OFF".)

Time set with "Low night noise operationend setting"

Night-time

PM 8:00 PM 10:00 PM 0:00 AM 6:00 AM 7:00AM 8:00

Set with "Low night noise operation start setting".(Factory setting is "PM 10:00".)

Set with "Low night noise operation end setting".(Factory setting is "AM 8:00".)

Time set with "Low night noise operation start setting"

Operation sound

Rated operationsoundOperation sound of mode 1Operation sound of mode 2Operation sound of mode 3


Time set with "Low night noiseoperation end setting" Operation sound during low noise

mode is instructed can be set with "External low noise level setting".(Factory setting is "Mode 2".)Operation sound during low night noise mode is instructed can be set with "Low night noise level setting".(Factory setting is "OFF".)

When external low noise instruction is received during the operation with low night noise mode, Mode 2 precedes Mode 1 and Mode 3 precedes Mode 2.

∗ Night-time

∗ Low noise mode instructing∗ Operation sound

level set with "Low night noise operation setting"

∗ Operation sound set with "External low noise operation setting"

PM 8:00 PM 10:00 PM 0:00 AM 6:00 AM 7:00AM 8:00

Set with "Low night noise operation start setting".(Factory setting is "PM 10:00".)

Set with "Low night noise operation end setting".(Factory setting is "AM 8:00".)

Low noise mode instructing Operation sound set with "External low noise operation setting"

Time set with "Low night noise operation start setting"

132 Field Settings


Setting of Demand OperationBy connecting the external contact input to the demand input of the outdoor unit external control adaptor for outdoor unit (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition.

∗: However the demand operation does not occur in the following operation modes.

If carrying out demand or low noise input, connect the adaptor’s terminals as shown below.

A. When the demand operation is carried out by external contact (with the use of the external control adaptor for outdoor unit).

1. Connect external control adaptor for outdoor unit and short circuit terminals as required (Refer above figure).2. While in "Setting mode 2", set the setting condition for set item No. 12 (Setting of external low noise/demand

operation) to "YES".3. If necessary, while in "Setting mode 2", select the set item No. 30 (Setting of Demand 1 level) and then set

the setting condition to targeted mode.

Description of setting Setting procedure

Settingitem Condition Description

External control adaptor for outdoor

unitOutdoor unit PCB

Demand 1

Level 1Operate with power of approx. 60% or less of the rating.

Short circuit between "1" and "C" of the terminal block (TeS1).

Set the setting item No. 32 to "Demand 1" and the setting item No. 30 to "Level 1".





Demand 2 –Operate with power of approx. 40% or less of the rating.

Short circuit between "2" and "C". Set the setting item No. 32 to "Demand 2".

Demand 3 – Operate with forced thermostat OFF

Short circuit between "3" and "C" –

(1) Startup control (2) Oil return operation(3) Defrosting operation (4) Pump down residual operation

X

X

X

X

X X X X X X

1 2 3 CDemand

Low noise

Outside wiring indicated by dotted line

External control adaptor for outdoor unit


F1

F2

P3

P4

F1

F2

P3

P4

Field Settings 133


B. When the Normal demand operation is carried out. (Use of the external control adaptor for outdoor unit is not required.)

1. While in "Setting mode 2", make setting of the set item No. 32 (Setting of alternate demand) to "ON".2. While in "Setting mode 2", select the set item No. 30 (Setting of Demand 1 level) and then set the setting

condition to targeted mode.

Image of operation in the case of A

Image of operation in the case of B

To other external control adaptorfor outdoor unit

Demand2

P

Outsidewiringindicated bydotted line.

3

If carrying out demand or low-noise input, connect the terminalsof the external control adaptor for outdoor unit as shown below.

F1F2N

1 C Lownoise

X1M


Power consumption

Rated power consumption

80 % of rated power consumption70 % of rated power consumption60 % of rated power consumption

40 % of rated power consumption

Forced thermostat OFF(Fan operation)

Demand level 1 instructing

Power consumption set by "Demand 1 level setting".

Demand level 2 instructing Demand level 3 instructing

The power consumption during the demand level 1 instructing can be set with the "Demand 1 level setting".("70 % of rated power consumption" has been set at factory.)

The power consumption set with "Demand 1 level setting".

When the "Normal demand setting" is set to ON ("OFF" has been set at factory.) , the power consumption can be set with the "Demand 1 level setting". ("70 % of rated power consumption" has been set at factory.)

Power consumption



134 Field Settings


Image of operation in the case of A and B

Detailed Setting Procedure of Low Night Noise Operation and Demand Control1. Setting mode 1 (H1P OFF)

In setting mode 2, press the BS1 (MODE button) once → Setting mode 1 is entered and H1P turns OFF.During the setting mode 1 is displayed, “In low night noise operation” and “In demand control” are displayed.

2. Setting mode 2 (H1P ON)(1) In setting 1, press and hold the BS1 (MODE button) for more than 5 seconds. → Setting mode 2 is entered

and H1P lights.(2) Press the BS2 (SET button) several times and match the LED display with the Setting No. you want.(3) Press the BS3 (RETURN button) once, and the present setting content is displayed.

→ Press the BS2 (SET button) several times and match the LED display with the setting content you want.(4) Press the BS3 (RETURN button) two times. → Returns to (1).(5) Press the BS1 (MODE button) once → Returns to the setting mode 1 and H1P turns OFF.

The power consumption set with "Demand 1 level setting".Demand level 2 instructing Demand level 3 instructing

The power consumption can be set with the "Demand 1 level setting". ("70 % of rated power consumption" has been set at factory.)

During continuous demand operation, when the external demand instruction is received repeatedly, the instruction with higher demand level has the precedence.

Power consumption



40 % of rated power consumption

Forced thermostat OFF(Fan operation)

Field Settings 135

Charging Refrigerant SiUS341504E

4. Charging Refrigerant4.1 Precautions

• To avoid compressor breakdown. Do not charge the refrigerant more than the specified amount.• This outdoor unit is factory charged with refrigerant and depending on pipe sizes and pipe lengths some

systems require additional charging of refrigerant.• In case re-charge is required, refer to the nameplate of the unit. It states the type of refrigerant and

necessary amount.

4.2 Calculating the Additional Refrigerant ChargeHow to calculate the additional refrigerant to be chargedAdditional refrigerant to be charged = R (lbs.). R should be rounded off in units of 0.1 lbs.

R = [(X1 × φ7/8) × 0.249 + (X2 × φ3/4) × 0.175 + (X3 × φ5/8) × 0.121 + (X4 × φ1/2) × 0.081 + (X5 × φ3/8) × 0.040 + (X6 × φ1/4) × 0.015] × 1.04 + [A] + [B] + [C]

X1...6 = Total length (ft. (m)) of liquid piping size at φa

∗ In units of 0.1 kg, additional refrigerant to be charged = R (kg).R = [(X1 × φ22.2) × 0.37 + (X2 × φ19.1) × 0.26 + (X3 × φ15.9) × 0.18 + (X4 × φ12.7) × 0.12 + (X5 × φ9.5) × 0.059 + (X6 × φ6.4) × 0.022] × 1.04 + [A] + [B] + [C]

NOTE • Refrigerant cannot be charged until field wiring has been completed.• Refrigerant may only be charged after performing the leak test and the vacuum

drying.• When charging a system, care shall be taken that its maximum permissible

charge is never exceeded, in view of the danger of liquid hammer.• Charging with an unsuitable substance may cause explosions and accidents,

so always ensure that the appropriate refrigerant R-410A is charged.• Refrigerant containers shall be opened slowly.• Always use protective gloves and protect your eyes when charging refrigerant.• When the refrigerant system is to be opened, refrigerant must be treated

according to the applicable legislation.

DANGER: Electrical shock

Parameter [A]Refrigerant amount for Branch Selector units

Branch Selector unit model Refrigerant amount

BS4Q54T 0.7 lbs./unit (0.3 kg/unit)





BSQ36T 0.1 lbs./unit (0.05 kg/unit)



136 Field Settings

SiUS341504E Charging Refrigerant

INFORMATION • Piping length is considered the distance from the outdoor unit to the farthest indoor unit.

• When using more than one multi branch selector unit, add the sum of the individual BS unit charge factors.

• In case of a multi-outdoor-unit system, add the sum of the individual outdoor unit charge factors.

Parameter [B]Refrigerant amount for outdoor units

Outdoor unit capacity type Refrigerant amount

REYQ72T 0.0 lbs./unit (0.0 kg/unit)





Parameter [C]Refrigerant amount by field piping length

and indoor units capacity

Field piping length

Total indoor unit capacity connection

ratio

Refrigerant amount Total outdoor unit capacity type

REYQ72-144T REYQ168-288T REYQ312-456T

< 295.3 ft. (90 m)≤ 85% 0.0

> 85% The smaller of [D] or 5.51 lbs. (2.5 kg)

The smaller of [D] or 6.61 lbs. (3.0 kg)

The smaller of [D] or 7.50 lbs. (3.4 kg)

≥ 295.3 ft. (90 m)≤ 85% 0.0

> 85% 2.20 lbs. (1.0 kg)

Field Settings 137


4.3 Method for Adding Refrigerant4.3.1 Flow Chart

For more information, see “Charging Method” on P.140.

Be sure to charge the specified amount of refrigerant in liquid state.Since this refrigerant is a mixed refrigerant, adding it in gas form may cause the refrigerant composition to change, preventing normal operation.• Before charging, check whether the refrigerant cylinder is equipped with a siphon tube or not.

• Be sure to use tools exclusively for R-410A to ensure required pressure resistance and to prevent foreign materials from mixing into the system.

Pre-charging refrigerant

Step 2+3

Step 4a Step 4b

R=Q

R>Q

R>QR<Q

p< p>

R-410AN2

C D

A B

Charging refrigerant

Step 6

Step 5 (Refer as left figure)

• Connect valve A to the suction gas stop • valve service port.• Open all outdoor unit stop valves

Manual charge

p< p>

R-410A

A

Step 5 ~ End

• Close valves C, D and A

• Open valve B to the liquid line

• Execute pre-charging amount: Q (kg)

• Disconnect the manifold from the suction gas line and the high

pressure/low pressure gas line

• Close valve B• Charging is finished• Fill in the amount on the additional

refrigerant charge label• Go to test run

• Close valve B• Disconnect the manifold from

the liquid line

• Close valve A• Press BS3 to stop manual charging• Charging is finished• Fill in the amount on the additional

refrigerant charge label• Go to test run

Refrigerant overcharge happened, recover refrigerant to reach R=Q

Step 1Calculate additional refrigerant charge amount: R (kg)

• Open valve A• Charge remaining amount of refrigerant P (kg)

R = Q + P

Activate field setting [2-20] = 1Unit will start manual refrigerant charging operation.

See figure “Location of valves” on P.140 for more information refer to the text in this chapter.

Charge the liquid refrigerant with the cylinder in upside-down position.

Charge the liquid refrigerant with the cylinder in upright position.

138 Field Settings


NOTE Charging with an unsuitable substance may cause explosions and accidents, so always make sure that the appropriate refrigerant (R-410A) in charged. Refrigerant containers must be opened slowly.

CAUTION • When charging a system, charging over the permissible quantity can cause liquid hammer.

• Always use protective gloves and protect your eyes when charging refrigerant.

• When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the tank is left with the valve open, the amount of refrigerant which is properly charged may get off point. More refrigerant may be charged by any remaining pressure after the unit has stopped.

NOTE • If the power of some units is turned OFF, the charging procedure cannot be finished properly.

• In case of a multiple outdoor system, turn on the power of all outdoor units.• Make sure to turn ON the power 6 hours before starting the operation. This is necessary to warm the crankcase by the electric heater.

• If operation is performed within 12 minutes after the indoor and outdoor units are turned on, the compressor will not operate before the communication is established in a correct way between outdoor unit(s) and indoor units.

• Before starting charging procedures, check if the segment display indication of the outdoor unit A1P PCB is as normal (see "Functions of the BS button which are located on the outdoor unit PCB (A1P)".

• Make sure all connected indoor units are recognised• Close the front panel before any refrigerant charge operation is executed. Without the front panel attached the unit cannot judge correctly whether it is operating properly or not.

NOTE In case of maintenance and the system (outdoor unit+field piping+indoor units) does not contain any refrigerant any more (e.g., after refrigerant reclaim operation), the unit has to be charged with its original amount of refrigerant (refer to the nameplate on the unit) by pre-charging before the automatic charging function can be started.

Field Settings 139


4.3.2 Charging MethodAs explained during vacuum drying method, once vacuum drying is finished, additional refrigerant charging can start.

Adding refrigerant by using the manual refrigerant charging function. See "Adding refrigerant by using the manual charging function". This method uses a manual method for charging refrigerant.

A flow chart is available which gives an overview of the possibilities and actions to be taken (see "Flow Chart" on P.138).

To speed up the process of pre-charging refrigerant for large systems, it is recommended to first charge a portion of the refrigerant before performing charging. This step is included in below procedure. This step can be skipped, charging will take longer in such a case.

Follow the steps as described below and take into account whether you want to use the automatic charge function or not.1 Calculate the additional amount of refrigerant to be added using the formula mentioned in "Calculating the

Additional Refrigerant Charge" on P.136.2 The first 10 kg (22 lbs) of additional refrigerant can be charged without outdoor unit operation.

If the additional refrigerant amount is smaller than 10 kg (22 lbs), perform the pre-charging procedure as explained in step 3 and 4a below.If the additional refrigerant charge is larger than 10 kg (22 lbs), perform step 3 till the end of the procedure.

3 Pre-charging can be done without compressor running by connecting the refrigerant bottle to the liquid stop valve service port (open valve B). Make sure that all outdoor unit stop valve , as well as valve A,C,D are closed

4 Do one of the following:

If Then

4a The calculated additional refrigerant amount is reached by above pre-charging procedure

Close valve B and disconnect the manifold from the liquid line.

4b The total amount of refrigerant could not be charged by pre-charging

Close valve B, disconnect the manifold from the liquid line, and perform steps 5~6.

p< p>

R-410AN2

C

b e

agh

fd

A

Pressure reducing valveNitrogenWeighing scalesRefrigerant R-410A tank (siphon system)Vacuum pumpLiquid line stop valveGas line stop valveHigh pressure/low pressure gas line stop valveValve AValve BValve CValve D

abcdef

ghABCD

c

B

D

140 Field Settings


5 After pre-charging, perform the refrigerant charge operation as shown below and connect valve A to the gas line stop valve service port and charge the remaining additional refrigerant through this port open all outdoor unit stop valves. At this point, valve A must remain closed.

Adding refrigerant by using the manual charging function6 The remaining additional refrigerant charge can be charged by operating the outdoor unit by means of the

manual refrigerant charge operation mode:• Turn on the power of the indoor units and outdoor unit.• Take all the precautions mentioned in "start-up and configuration" into account.• Activate outdoor unit setting [2-20] = 1 to start manual refrigerant charge mode.Result: The unit will start operation. Valve A can be opened.Charging of remaining additional refrigerant can be done.When the remaining calculated additional refrigerant amount is added, close valve A and press BS3 to stop the manual refrigerant charging procedure.

INFORMATION If the total additional refrigerant amount was reached in step 4 (by pre-charging only), record the amount of refrigerant that was added on the additional refrigerant charge label provided with the unit and attach it on the back side of the front panel.

Perform the test procedure as described in "Test Operation" on P.99.

p< p>

R-410A

A

INFORMATION For a multi outdoor unit system, it is not required to connect all charge ports to a refrigerant tank.

The refrigerant will be charged with ± 22 kg (48.5 lbs) in 1 hour time at an outdoor temperature of 30°C DB (86°FDB) or with ± 6 kg (13.2 lbs) at an outdoor temperature of 0°C DB (32°FDB).

If you need to speed up in case of a multiple outdoor system, connect the refrigerant tanks to each outdoor unit.

NOTE • The unit's internal piping is already factory charged with refrigerant, so be careful when connecting the charge hose.

• After adding the refrigerant, do not forget to close the lid of the refrigerant charging port. The tightening torque for the lid is 11.5 ~ 13.9 N·m (8.5 ~ 10.3 ft·lbf).

• In order to ensure uniform refrigerant distribution, it may take the compressor ±10 minutes to start up after the unit has started operation. This is not an error.

Field Settings 141


4.3.3 Checks after Adding Refrigerant• Are the stop valves for liquid and gas open?• Is the amount of refrigerant, that has been added, recorded on the refrigerant charge label?

INFORMATION • The manual refrigerant charge operation will automatically stop within 30 minutes. If charging is not completed after 30 minutes, perform the additional refrigerant charging operation again.

• When an error is detected during the procedure (e.g., in case of closed stop valve), an error code will be displayed. In that case, refer to "Error code list" on P.152 and solve the error accordingly. Resetting the error can be done by pushing BS3. The procedure can be restarted from 6B).

• Aborting the manual refrigerant charge is possible by pressing BS3. The unit will stop and return to idle condition.

NOTE Make sure to open all stop valves after (pre-) charging the refrigerant.Operating with the stop valves closed will damage the compressor.

142 Field Settings

SiUS341504E

Part 6Service Diagnosis

1. Symptom-based Troubleshooting ...........................................................1452. Troubleshooting by Remote Controller ...................................................148

2.1 Mode Access Operation ........................................................................... 1482.2 Procedure of Self-diagnosis by Remote Controller .................................. 1492.3 Error Code and Description...................................................................... 1522.4 Error Codes - Sub Codes ......................................................................... 154

3. Troubleshooting by Indication on the Remote Controller ........................1553.1 External Protection Device Abnormality ................................................... 1553.2 PCB Abnormality ...................................................................................... 1563.3 Drain Level Control System (S1L) Abnormality........................................ 1573.4 Fan Motor (M1F) Lock, Overload ............................................................. 1593.5 Indoor Unit Fan Motor Abnormality .......................................................... 1623.6 Indoor Unit Fan Motor Abnormality .......................................................... 1633.7 Overload / Overcurrent / Lock of Indoor Unit Fan Motor .......................... 1663.8 Swing Flap Motor (M1S) Abnormality....................................................... 1673.9 Power Supply Voltage Abnormality .......................................................... 1693.10 Electronic Expansion Valve Coil Abnormality / Dust Clogging ................. 1703.11 Electronic Expansion Valve Coil Abnormality........................................... 1713.12 Drain Level above Limit............................................................................ 1723.13 Capacity Determination Device Abnormality ............................................ 1733.14 Transmission Abnormality between Indoor Unit PCB and Fan PCB........ 1743.15 Thermistor Abnormality ............................................................................ 1763.16 Combination Error between Indoor Unit PCB and Fan PCB .................... 1773.17 Remote Sensor Abnormality .................................................................... 1783.18 Thermistor Abnormality ............................................................................ 1793.19 Humidity Sensor System Abnormality ...................................................... 1803.20 Room Temperature Thermistor in Remote Controller Abnormality .......... 1813.21 PCB Abnormality ...................................................................................... 1823.22 Actuation of High Pressure Switch ........................................................... 1833.23 Actuation of Low Pressure Sensor ........................................................... 1853.24 INV Compressor Motor Lock .................................................................... 1863.25 Compressor Damage Alarm..................................................................... 1883.26 Outdoor Unit Fan Motor Abnormality........................................................ 1903.27 Electronic Expansion Valve Coil Abnormality........................................... 1923.28 Discharge Pipe Temperature Abnormality ............................................... 1933.29 Wet Alarm................................................................................................. 1953.30 Refrigerant Overcharged.......................................................................... 1963.31 Harness Abnormality (between Control PCB and Inverter PCB) ............. 1973.32 Outdoor Unit Fan Motor Signal Abnormality............................................. 1983.33 Thermistor Abnormality ............................................................................ 2003.34 High Pressure Sensor Abnormality .......................................................... 202

Service Diagnosis 143

SiUS341504E

3.35 Low Pressure Sensor Abnormality ........................................................... 2033.36 Inverter PCB Abnormality......................................................................... 2043.37 Reactor Temperature Rise Abnormality ................................................... 2063.38 Inverter Radiation Fin Temperature Rise Abnormality ............................. 2073.39 INV Compressor Instantaneous Overcurrent ........................................... 2083.40 INV Compressor Overcurrent................................................................... 2103.41 INV Compressor Startup Abnormality ...................................................... 2123.42 Transmission Error between Inverter and Control PCB ........................... 2153.43 Power Supply Voltage Imbalance ............................................................ 2173.44 Reactor Temperature Abnormality ........................................................... 2193.45 Inverter Radiation Fin Temperature Abnormality ..................................... 2203.46 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or

Combination of PCB Abnormality............................................................. 2213.47 Refrigerant Shortage ................................................................................ 2223.48 Reverse Phase, Open Phase................................................................... 2233.49 Power Supply Insufficient or Instantaneous Abnormality ......................... 2243.50 Check Operation is not Executed............................................................. 2263.51 Transmission Error between Indoor Units and Outdoor Units.................. 2273.52 Transmission Error between Remote Controller and Indoor Unit............. 2303.53 Transmission Error between Outdoor Units ............................................. 2313.54 Transmission Error between Main and Sub Remote Controllers ............. 2373.55 Transmission Error between Indoor and Outdoor Units in the

Same System........................................................................................... 2383.56 Improper Combination of Indoor and Outdoor Units,

Indoor Units and Remote Controller......................................................... 2393.57 Address Duplication of Centralized Control Equipment ........................... 2423.58 Transmission Error between Centralized Control Equipment and

Indoor Unit ................................................................................................ 2433.59 System is not Set yet................................................................................ 2453.60 System Abnormality, Refrigerant System Address Undefined ................. 2463.61 Check ....................................................................................................... 248

144 Service Diagnosis

SiUS341504E Symptom-based Troubleshooting

1. Symptom-based TroubleshootingNo. Symptom Supposed Cause Countermeasure

1 The system does not start operation at all. Blowout of fuse(s) Turn OFF the power supply and then replace the fuse(s).

Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.

• If the knob of any circuit breaker is in its tripped position, do not turn ON the power supply.

Power failure After the power failure is reset, restart the system.

2 The system starts operation but makes an immediate stop.

Blocked air inlet or outlet of indoor or outdoor unit

Remove obstacle(s).

Clogged air filter(s) Clean the air filter(s).

3 The system does not cool or heat air well. Blocked air inlet or outlet of indoor or outdoor unit

Remove obstacle(s).

Clogged air filter(s) Clean the air filter(s).

Enclosed outdoor unit(s) Remove the enclosure.

Improper set temperature Set the temperature to a proper degree.

Airflow rate set to "LOW" Set it to a proper airflow rate.

Improper direction of air diffusion Set it to a proper direction.

Open window(s) or door(s) Shut it tightly.

[In cooling] Direct sunlight received Hang curtains or shades on windows.

[In cooling] Too many persons staying in a room

The model must be selected to match the air conditioning load.

[In cooling] Too many heat sources (e.g. OA equipment) located in a room

4 The system does not operate.

The system stops and immediately restarts operation.

If the OPERATION lamp on the remote controller turns ON, the system will be normal. These symptoms indicate that the system is controlled so as not to put unreasonable loads on the system.

Normal operation. The system will automatically start operation after a lapse of 5 minutes.Pressing the TEMP ADJUST

button immediately resets the system.

The remote controller displays "UNDER CENTRALIZED CONTROL", which blinks for a period of several seconds when the OPERATION button is depressed.

The system is controlled with centralized control equipment. Blinking display indicates that the system cannot be operated using the remote controller.

Operate the system using the COOL/HEAT central remote controller.

The system stops immediately after turning ON the power supply.

The system is in preparation mode of micro-computer operation.

Wait for a period of approximately 1 minute.

5 The system makes intermittent stops.

The remote controller displays error codes "U4" and "U5", and the system stops but restarts after a lapse of several minutes.

The system stops due to an interruption in communication between units caused by electrical noises coming from equipment other than air conditioners.

Remove causes of electrical noises.If these causes are removed, the system will automatically restart operation.

6 COOL-HEAT selection is disabled.

The remote controller displays "UNDER CENTRALIZED CONTROL".

This remote controller has no option to select cooling operation.

Use a remote controller with option to select cooling operation.

The remote controller displays "UNDER CENTRALIZED CONTROL", and the COOL-HEAT selection remote controller is provided.

COOL-HEAT selection is made using the COOL-HEAT selection remote controller.

Use the COOL-HEAT selection remote controller to select cool or heat.

ON

OFF

Knob

Tripped

Circuit breaker


Symptom-based Troubleshooting SiUS341504E

7 The system conducts fan operation but not cooling operation or heating operation.

This symptom occurs immediately after turning ON the power supply.

The system is in preparation mode of operation.

Wait for a period of approximately 10 minutes.

8 The airflow rate is not reproduced according to the setting.

Even pressing the AIRFLOW RATE SET button makes no changes in the airflow rate.

In heating operation, when the room temperature reaches the set degree, the outdoor unit will stop while the indoor unit is brought to fan LL operation so that no one gets cold air.Furthermore, if fan operation mode is selected when other indoor unit is in heating operation, the system will be brought to fan LL operation.(The fan LL operation is also enabled while in oil return mode in cooling operation.)

Normal operation.

9 The airflow direction is not reproduced according to the setting.

The airflow direction is not corresponding to that displayed on the remote controller.The flap does not swing.

Automatic control Normal operation.

10 A white mist comes out from the system.

<Indoor unit>In cooling, the ambient humidity is high.(This indoor unit is installed in a place with much oil or dust.)

Uneven temperature distribution due to heavy stain of the inside of the indoor unit.

Clean the inside of the indoor unit.

<Indoor unit>Immediately after cooling operation stopping, the outdoor air temperature and ambient humidity are low.

Hot gas (refrigerant) flown in the indoor unit results to be vapor from the unit.

Normal operation.

<Indoor and outdoor units>After the completion of defrosting operation, the system is switched to heating operation.

Defrosted moisture turns to be vapor and comes out from the units.

Normal operation.

No. Symptom Supposed Cause Countermeasure


SiUS341504E Symptom-based Troubleshooting

11 The system produces sounds.

<Indoor unit>Immediately after turning ON the power supply, indoor unit produces "ringing" sounds.

These are operating sounds of the electronic expansion valve of the indoor unit.

Normal operation.This sound becomes low after a lapse of approximately 1 minute.

<Indoor and outdoor units>"Hissing" sounds are continuously produced while in cooling or defrosting operation.

These sounds are produced from gas (refrigerant) flowing respectively through the indoor and outdoor units.

Normal operation.

<Indoor and outdoor units>"Hissing" sounds are produced immediately after the startup or stop of the system, or the startup or stop of defrosting operation.

These sounds are produced when the gas (refrigerant) stops or changes flowing.

Normal operation.

<Indoor unit>Faint sounds are continuously produced while in cooling operation or after stopping the operation.

These sounds are produced from the drain discharge device in operation.

Normal operation.

<Indoor unit>"Creaking" sounds are produced while in heating operation or after stopping the operation.

These sounds are produced from resin parts expanding and contracting with temperature changes.

Normal operation.

<Indoor unit>Sounds like "trickling" or the like are produced from indoor units in the stopped state.

On VRV systems, these sounds are produced when other indoor units in operation. The reason is that the system runs in order to prevent oil or refrigerant from dwelling.

Normal operation.

<Outdoor unit>Pitch of operating sounds changes.

The reason is that the compressor changes the operating frequency.

Normal operation.

12 Dust comes out from the system.

Dust comes out from the system when it restarts after the stop for an extended period of time.

Dust, which has deposited on the inside of indoor unit, is blown out from the system.

Normal operation.

13 Odors come out from the system.

In operation Odors of room, cigarettes or else adsorbed to the inside of indoor unit are blown out.

The inside of the indoor unit should be cleaned.

14 Outdoor unit fan does not rotate.

In operation The reason is that fan revolutions are controlled to put the operation to the optimum state.

Normal operation.

15 LCD display "88" appears on the remote controller.

Immediately after turning ON the power supply

The reason is that the system is checking to be sure the remote controller is normal.

Normal operation.This code is displayed for a period of approximately 1 minute at maximum.

16 The outdoor unit compressor or the outdoor unit fan does not stop.

After stopping operation It stops in order to prevent oil or refrigerant from dwelling.

Normal operation.It stops after a lapse of approximately 5 to 10 minutes.

17 The outdoor gets hot.

While stopping operation The reason is that the compressor is warmed up to provide smooth startup of the system.

Normal operation.

18 Hot air comes out from the system even though it stops.

Hot air is felt while the system stops.

On VRV systems, small quantity of refrigerant is fed to indoor units in the stopped state when other indoor units are in operation.

Normal operation.

19 The system does not cool air well.

The system is in dry operation. The reason is that the dry operation serves not to reduce the room temperature where possible.

Change the system to cooling operation.

No. Symptom Supposed Cause Countermeasure


Troubleshooting by Remote Controller SiUS341504E

2. Troubleshooting by Remote Controller2.1 Mode Access Operation2.1.1 BRC1E73

Basic screen

Main Menu screen

Service Settings screen Maintenance Menu screen

Setting

Main Menu

Airflow DirectionIndividual Airflow DirectionVentilationScheduleOff TimerCelsius / Fahrenheit

1/3 <Main Menu>• Airflow Direction• Individual Airflow Direction• Ventilation• Schedule• Off Timer• Celsius / Fahrenheit• Filter Auto Clean• Maintenance Information• Configuration• Current Settings• Clock & Calendar• Daylight Saving Time• LanguagePress "Cancel"

button once.Press "Menu/OK" button once.

<Basic Screen>• Operation mode changeover• Fan speed control• Menu display• Confirmation of each setting• On• Off• Cancel• Operation lamp

Press "Cancel" button for 4 seconds or more.


Press "Cancel" button for 4 seconds or more.


<Maintenance Menu>• Model Name• Operation Hours• Indoor Unit Status• Outdoor Unit Status• Forced Defrost• Error Display• Swap Unit No.• Addressed Sensor Value

<Service Settings>• Test Operation• Maintenance Contact• Field Settings• Energy Saving Options• Prohibit Function• Min Setpoints Differential• Group Address• Indoor unit AirNet Address• Outdoor unit AirNet Address• Error History• Indoor Unit Status• Outdoor Unit Status• Forced Fan ON• Switch Main Sub Controller• Filter Indicator• Test Filter Auto Clean• Brush / Filter Ind.• Disable Filter Auto Clean


SiUS341504E Troubleshooting by Remote Controller

2.2 Procedure of Self-diagnosis by Remote Controller 2.2.1 Wired Remote Controller — BRC1E73

The following will be displayed on the screen when an error (or a warning) occurs during operation.Check the error code and take the corrective action specified for the particular model.

(1) Checking an error or warning

(2) Taking corrective action

Screen

Operation lamp

Operation Status Display

Abnormal shutdown

The system stops operating.

The operation lamp (green) starts to blink. The message "Error: Push Menu button" will appear and blink at the bottom of the screen.

Warning The system continues its operation.

The operation lamp (green) remains on. The message "Warning: Push Menu button" will appear and blink at the bottom of the screen.

· Press the Menu/OK button to check the error code.

· Take the corrective action specific to the model.

Error code

Applicable model names

FXFQ07TVJUREYQ72TTJU



2.2.2 Wireless Remote ControllerIf unit stops due to an error, the operation indicating LED on the signal receiving part of indoor unit blinks.The error code can be determined by following the procedure described below. (The error code is displayed when an operation error has occurred. In normal condition, the error code of the last problem is displayed.)

1 Press the INSPECTION/TEST button to select “inspection”. The equipment enters the inspection mode. The “Unit” indication is displayed and the Unit No. display shows blinking “0” indication.

2 Set the Unit No.Press the UP or DOWN button and change the Unit No. display until the buzzer (∗1) is generated from the indoor unit.∗1. Number of beeps

3 short beeps: Conduct all of the following operations.1 short beep: Conduct steps 3 and 4.

Continue the operation in step 4 until a buzzer remains ON. The continuous buzzer indicates that the error code is confirmed.

Continuous beep: No abnormality.

3 Press the MODE selector button.The left “0” (upper digit) indication of the error code blinks.

4 Error code upper digit diagnosisPress the UP or DOWN button and change the error code upper digit until the error code matching buzzer (∗2) is generated.

The upper digit of the code changes as shown below when the UP and DOWN buttons are pressed.

∗2. Number of beepsContinuous beep: Both upper and lower digits matched. (Error code confirmed)2 short beeps: Upper digit matched.1 short beep: Lower digit matched.

5 Press the MODE selector button.The right “0” (lower digit) indication of the error code blinks.

6 Error code lower digit diagnosisPress the UP or DOWN button and change the error code lower digit until the continuous error code matching buzzer (∗2) is generated.

The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed.

0 A C E H F J L P U 9 8 7 6 5 4"UP" button "DOWN" button

0 1 2 3 4 5 6 7 8 9 A H C J E F"UP" button "DOWN" button



Normal statusEnters inspection mode from normal status when the INSPECTION/TEST button is pressed.

1 Press INSPECTION/TEST button.

If no button is pressed for 1 minute, equipment returns to normal status.

If no button is pressed for 1 minute, equipment returns to normal status.

When MODE selector button is pressed or no button is pressed for 1 minute, equipment returns to normal status.

3Press MODE selector button.

5 Press MODE selector button.

F



2.3 Error Code and Descriptionk: ON h: OFF l: Blink

Error code Operation lamp

Error contents Page Referred

Indoor Unit A0 l External protection device abnormality 155

A1 l PCB abnormality 156

A3 l Drain level control system (S1L) abnormality 157

A6 l Fan motor (M1F) lock, overload 159

A6 l Indoor unit fan motor abnormality 162, 163

A6 l Overload / overcurrent / lock of indoor unit fan motor 166

A7 k Swing flap motor (M1S) abnormality 167

A8 l Power supply voltage abnormality 169

A9 l Electronic expansion valve coil abnormality / dust clogging 170

A9 l Electronic expansion valve coil abnormality 171

AF k Drain level above limit 172

AJ l Capacity determination device abnormality 173

C1 l Transmission abnormality between indoor unit PCB and fan PCB 174

C4 l Heat exchanger liquid pipe thermistor abnormality 176

C5 l Heat exchanger gas pipe thermistor abnormality 176

C6 l Combination error between indoor unit PCB and fan PCB 177

C9 l Suction air thermistor abnormalityRemote sensor abnormality

176178

CA l Thermistor abnormality 179

CC k Humidity sensor system abnormality 180

CJ k Room temperature thermistor in remote controller abnormality 181Outdoor Unit E1 l PCB abnormality 182

E3 l Actuation of high pressure switch 183

E4 l Actuation of low pressure sensor 185

E5 l INV compressor motor lock 186

E6 l Compressor damage alarm 188

E7 l Outdoor unit fan motor abnormality 190

E9 l Electronic expansion valve coil abnormality 192

F3 l Discharge pipe temperature abnormality 193

F4 l Wet alarm 195

F6 l Refrigerant overcharged 196

H3 l Harness abnormality (between control PCB and inverter PCB) 197

H7 l Outdoor unit fan motor signal abnormality 198

H9 l Outdoor air thermistor (R1T) abnormality 200

J3 l Discharge pipe thermistor (R21T, R22T, R2T) abnormalityCompressor surface temperature thermistor (R14T) abnormality

200

J5 l Compressor suction thermistor (R12T) abnormalitySuction air thermistor (R10T) abnormality

200

J6 l Heat exchanger deicer thermistor (R11T) abnormalityHeat exchanger gas pipe thermistor (R8T, R9T) abnormality

200

J7 l Receiver inlet thermistor (R3T) abnormalitySubcooling heat exchanger liquid pipe thermistor (R7T) abnormality

200

J8 l Heat exchanger liquid pipe thermistor (R4T, R5T) abnormality 200

J9 l Subcooling heat exchanger gas pipe thermistor (R6T) abnormalityReceiver gas purge thermistor (R13T) abnormality

200

JA l High pressure sensor abnormality 202

JC l Low pressure sensor abnormality 203

L1 l Inverter PCB abnormality 204

L3 l Reactor temperature rise abnormality 206



Outdoor Unit L4 l Inverter radiation fin temperature rise abnormality 207

L5 l INV compressor instantaneous overcurrent 208

L8 l INV compressor overcurrent 210

L9 l INV compressor startup abnormality 212

LC l Transmission error between inverter and control PCB 215

P1 l Power supply voltage imbalance 217

P3 l Reactor Temperature Abnormality 219

P4 l Inverter radiation fin temperature abnormality 220

PJ l Field setting after replacing outdoor unit main PCB abnormality or combination of PCB abnormality

221

System U0 k Refrigerant shortage 222

U1 l Reverse phase, open phase 223

U2 l Power supply insufficient or instantaneous abnormality 224

U3 l Check operation is not executed 226

U4 l Transmission error between indoor units and outdoor units 227

U5 l Transmission error between remote controller and indoor unit 230

U7 l Transmission error between outdoor units 231

U8 l Transmission error between main and sub remote controllers 237

U9 l Transmission error between indoor and outdoor units in the same system 238

UA l Improper combination of indoor and outdoor units, indoor units and remote controller

239

UC k Address duplication of centralized control equipment 242

UE l Transmission error between centralized control equipment and indoor unit 243

UF l System is not set yet 245

UH l System abnormality, refrigerant system address undefined 246

k: ON h: OFF l: BlinkError code Operation

lamp Error contents Page

Referred

The system operates for error codes indicated in black squares, however, be sure to check and repair.



2.4 Error Codes - Sub CodesIf an error code like the one shown below is displayed when the navigation remote controller (BRC1E series) is in use, make a detailed diagnosis or a diagnosis of the relevant unit referring to the attached list of detailed error codes.

2.4.1 Indoor Unit

2.4.2 Outdoor UnitRefer to P.152.

Error codeTroubleshooting

Description of error Description of diagnosisA6 - 01 Fan motor locked A locked fan motor current has been detected.

Turn the fan by hand to check for the connection of connectors.A6 - 10 Fan overcurrent error A fan motor overcurrent has been detected.

Check for the connection of the connector between the fan motor and the PCB for the fan. If the connection is normal, replace the fan motor. If this still cannot solve the error, replace the PCB for the fan.

A6 - 11 Fan position detection error An error in the detection of position of the fan motor. Check for the connection of the connector between the fan motor and the PCB for the fan. If the connection is normal, replace the fan motor. If this still cannot solve the error, replace the PCB for the fan.

A8 - 01 Power supply voltage error Check for the input voltage of the fan motor.A9 - 01 Electronic expansion valve error There is an error in the electronic expansion valve coil or a

connector disconnected.A9 - 02 Refrigerant leakage detection error Refrigerant leaks even if the electronic expansion valve is closed.

Replace the electronic expansion valve.AH - 03 Transmission error (between the self-cleaning

decoration panel and the indoor unit) [when the self-cleaning decoration panel is mounted]

Check for the connection of the harness connector between the panel PCB and the indoor unit PCB.

AH - 04 Dust detection sensor error [when the self-cleaning decoration panel is mounted]

Check for the connections of the connector X12A on the panel PCB and the connectors X18A and X19A on the dust sensor PCBs.

AH - 05 Dust collection sign error [when the self-cleaning decoration panel is mounted]

Check for clogging with dust at the dust collection port as well as in the brush unit, S-shaped pipe, and dust box. Furthermore, check for any stains of the light receiving and emitting parts of the infrared unit.

AH - 06 Air filter rotation error[when the self-cleaning decoration panel is mounted]

Check for anything getting in the way of rotating the filter (e.g. the filter comes off or the drive gear is clogged with foreign matters).

AH - 07 Damper rotation error[when the self-cleaning decoration panel is mounted]

The damper does not rotate normally. Check for any foreign matters around the damper and for the operation of the gear and limit switch.

AH - 08 Filter self-cleaning operation error[when the self-cleaning decoration panel is mounted]

The unit has not yet completed the filter self-cleaning operation even after the lapse of specified period of time. Check for any external noise, etc.

AH - 09 Filter self-cleaning operation start disabled error [when the self-cleaning decoration panel is mounted]

The unit has been put into a state in which the filter self-cleaning operation is disabled. Check the unit for the operating conditions.

AJ - 01 Capacity setting error There is an error in the capacity setting of the indoor unit PCB.AJ - 02 Electronic expansion valve setting error There is a fault in the setting of the gear type electronic expansion

valve/direct acting type electronic expansion valve.C1 - 01 Transmission error (between indoor unit PCB

and the PCB for the fan)Check for the conditions of transmission between the indoor unit PCB and the PCB for the fan.

C6 - 01 Defective combination of indoor unit PCB and the PCB for the fan

A combination of indoor unit PCB and the PCB for the fan is defective. Check whether the capacity setting adaptor is correct and the type of the PCB for the fan is correct.

U4 - 01 Indoor-Outdoor transmission error Refer to the “U4” flow chart.UA - 13 Refrigerant type error The type of refrigerant used for the indoor unit is different from

that used for the outdoor unit.UA - 15 Not applicable for self-cleaning decoration

panel [when the self-cleaning decoration panel is mounted]

An outdoor unit is not applicable for the self-cleaning decoration panel is connected.


SiUS341504E Troubleshooting by Indication on the Remote Controller

3. Troubleshooting by Indication on the Remote Controller

3.1 External Protection Device Abnormality

Error Code A0Applicable Models

All indoor models

Method of Error Detection

Detect open or short circuit between external input terminals in indoor unit.

Error Decision Conditions

When an open circuit occurs between external input terminals with the remote controller set to "external ON/OFF terminal".

Supposed Causes

Actuation of external protection deviceImproper field settingDefective of indoor unit PCB

Troubleshooting

ON/OFF input from

outside (mode No. 12, first code No. 1) has

been set to external protection device input (second

code No. 03) by remote

controller.

Check the setting state of the external ON/OFF input by remote controller.

External protection device

is connected to terminals T1 and T2 of the indoor

unit terminal block.

Replace the indoor unit PCB.

Actuation of external protection device.

Change the second code No. to "01" or "02" .

YES

NO

NO

YES

CautionBe sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.


Troubleshooting by Indication on the Remote Controller SiUS341504E

3.2 PCB Abnormality


All indoor models


Check data from E²PROM.


When data could not be correctly received from the E²PROME²PROM : Type of nonvolatile memory. Maintains memory contents even when the power supply

is turned OFF.

Supposed Causes

Defective of indoor unit PCBExternal factor (Noise etc.)

Troubleshooting

Turn the power supply OFF, then the power ON again.

Does the system return to

normal?

YES



The indoor unit PCB is normal.External factor other than error (for example, noise etc.).

NO



3.3 Drain Level Control System (S1L) Abnormality


FXFQ, FXZQ, FXDQ, FXMQ-PB, FXMQ-M (Option), FXHQ (Option), FXAQ (Option)


By float switch OFF detection


When rise of water level is not a condition and the float switch goes OFF.

Supposed Causes

208~230V power supply is not providedDefective float switch or short circuit connectorDefective drain pumpDrain clogging, upward slope, etc. Defective indoor unit PCBLoose connection of connector



Troubleshooting

The float switch is

connected to X8A or X15A of the indoor

unit PCB.

A short circuit

connector is connected to X8A or X15A.

The drain pump

works when the power supply is reset for

the indoor unit.

The drain pump

is connected to X25A or terminals Y1 and

Y2 of the indoor unit PCB.

The voltage of

terminals Y1 and Y2 or X25A is 208~230V (within 5 minutes of resetting

the power supply).

Water builds up in the drain

pan.

The float switch functions

normally.

The float switch contact

is forming a short circuit (continuity check

with X8A or X15A disconnected)

Becomes normal when X8A

or X15A of the indoor unit PCB is short

circuited

Is power supply 208~230V

provided?


Replace the float switch.

Modify the float switch's connection and turn ON again.

Connect the drain pump and turn ON again.

Check the drain piping for clogging or upward slope, etc.


Replace the drain pump or check for dirt, etc.

Connect either a short circuit connector or float switch and turn ON again.

YES

YES

NO

YES

YES

YES


Loose the connection of connector.

NO NO

NO

YES

YES

NO

NO

YES

NO

YES

NO

NO

Provide 208~230V power supply.

YES

NO



3.4 Fan Motor (M1F) Lock, Overload


FXFQ, FXHQ, FXAQ


Abnormal fan revolutions are detected by a signal output from the fan motor.


When the fan revolutions do not increase

Supposed Causes

Broken wires in, short circuit of, or disconnection of connectors from the fan motor harnessDefective fan motor(Broken wires or defective insulation)Abnormal signal output from the fan motor (defective circuit)Defective PCBInstantaneous disturbance in the power supply voltageFan motor lock(Due to motor or external causes)The fan does not rotate due to foreign matters blocking the fan.Disconnection of the connector between the high-power PCB (A1P) and the low-power PCB (A2P)



Troubleshooting

YES

Is the connector

(X4A or X20A) for the fan motor

properly connected to the indoor unit

PCB? (∗1)

Remove the foreign matters.YES

Properly connect the connector.NO

NO

YES

By disconnecting the connector

(X4A or X20A) for the fan motor from the indoor

unit PCB, the fan can be lightly rotated

by hand.

Replace the fan motor.NO


YES

Are there any

foreign matters around the fan?

YES

Is the resistance

between the pins more than the

judgement criteria?

Disconnect the connector from the fan motor, and then make measurement of resistance between pins. (∗2)

Turn OFF the power supply, and then wait for a period of 10 minutes.





Note: ∗1. If any junction connector is provided between the connector (X20A) on the indoor unit PCB and the fan motor, also check whether or not the junction connector is properly connected.

∗2. Check on connector of fan motor (Power supply cable)Turn OFF the power supply.Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.

∗3. Check on connector of fan motor is not available for below models.FXFQ09~48PVJU, FXAQ07~24PVJU

Measuring Points

Black-Red

Black-White

Judgement

53.5Ω ±10%

31.6Ω ±10%

<FXHQ24·36MVJU>White

Black

RedMeasuring Points

Black-Red

Black-White

Judgement

71.0Ω ±10%

73.5Ω ±10%

<FXHQ12MVJU>



3.5 Indoor Unit Fan Motor Abnormality


FXDQ


This error is detected if there is no revolutions detection signal output from the fan motor.


When no revolutions can be detected even at the maximum output voltage to the fan

Supposed Causes

Defective indoor fan motorBroken wiresDefective contact

Troubleshooting

NO

YES

YES

Is the X4A

connector securely connected?

NO

Is the

power of approx. 12VDC

supplied between the Pins1 and 3 when

the X4A is disconnected and

the power supply turns

ON?


Properly connect the connectors.(At this time, check for any defective connector contact or broken wires.)

Check the indoor unit fan motor and the wiring circuits of the motor.




3.6 Indoor Unit Fan Motor Abnormality


FXMQ-PB


Error from the current flow on the fan PCBError from the RPM of the fan motor in operationError from the position signal of the fan motorError from the current flow on the fan PCB when the fan motor starting operation


An overcurrent flows.The RPM is less than a certain level for 6 seconds.A position error in the fan rotor continues for 5 seconds or more.

Supposed Causes

The clogging of a foreign matterThe disconnection of the fan motor connectors (X1A and X2A)The disconnection of the connectors between the indoor unit PCB (A1P) and fan PCB (A2P)Defective fan PCB (A2P)Defective fan motor



Troubleshooting

The fan motor

connectors (X1A and X2A) of the fan

PCB (A2P) are disconnected.

Remove the foreign matter.YES

Connect correctly.YES

NO

The connectors between the

indoor unit PCB (A1P) and the fan PCB (A2P)

are disconnected.

Connect correctly.YES

NO

The fuse (F3U,

white) on the fan PCB (A2P) has no

continuity.

Replace the fan PCB (A2P).NO

Replace the fan motor.YES

NO

YES

The fan can

be moved lightly by hand after

the fan motor connector of the fan PCB

(A2P) is removed.


YES

NO

YES

There is a foreign matter around

the fan.

The resistance

between the power wire terminals of the fan motor and motor frame (meal

part) is 1 MΩ or below.

Remove the power wire connector from the fan motor and measure the resistance between U and V, V and W, and W and U phases (∗1).

Turn OFF the power and wait for 10 minutes.

A




Note: ∗1. Check on connector of fan motor (Power supply cable)Turn OFF the power supply.Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.

∗2. Measurement of signal wire connector.Remove the X2A connector and measure the resistance between GND and VCC, HW, HV, or HU terminals of the motor connector (with 5 conductors).


NO

Between Vcc and GND terminals, and

between GND and Hw, Hv, or Hu terminals

are short-circuited.


Replace the fan PCB (A2P).YES

NO

The resistance

among U, V, and W are unbalanced or

short circuited.

NO

The HAP lamp

of the indoor unit PCB (A1P) blinks and the HAP lamp of the

fan PCB (A2P) is OFF.

Turn ON the power.

Remove the signal connector from the fan motor and check the resistance (∗2).

Replace the fan motor.

A

White

Black

Red

Measuring Points

Black-Red

Black-White

Judgement

3.5Ω ±10%

3.5Ω ±10%

Connector signal wire use (X2A)

5 Gray

4 Pink

3 Orange

2 Blue

1 Yellow

GND

Vcc

HW

HV

HU



3.7 Overload / Overcurrent / Lock of Indoor Unit Fan Motor


FXMQ-M


This error is detected by detecting that the individual power supply for the fan turns OFF.


When it is not detected that the individual power supply for the indoor unit fan turns ON while in operation.

Supposed Causes

Defective power supply for the indoor unit fan motorClogged drain pipingActuation of the indoor unit safety deviceDefective contact in the fan wiring circuit

Troubleshooting

Properly connect the cable.NO

YES

YES

Is the power supply

cable of the indoor unit fan properly

connected?

NO

Is the fan normally running?

Restart the fan.


It is supposed that the indoor unit fan motor stops running due to overload, overcurrent, or lock.




3.8 Swing Flap Motor (M1S) Abnormality


FXHQ


Utilizes ON/OFF of the limit switch when the motor turns.


When ON/OFF of the micro-switch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time (about 30 seconds).∗ Error code is displayed but the system operates continuously.

Supposed Causes

Defective swing motorDefective connection cable (power supply and limit switch)Defective airflow direction adjusting flap-camDefective indoor unit PCB



Troubleshooting

Indoor unit is a model

equipped with a swing flap function

The swing motor

works when the power supply is turned OFF

and then restart.

The connector is

connected to X9A of the indoor unit

PCB.

The limit switch functions

normally.

The relay cable is short circuited

or disconnected.

The relay cable has no continuity.


Is power supply 208~230V provided? Provide 208~230V power

supply.

YES

NO

Replace the limit switch relay cable.


Replace the power supply relay cable.

Replace the swing motor.

Take the flap-cam mechanism apart, reassemble and turn ON again.

YES

NO

YES

YES

NO

YES

NO

Connect the connector to X9A and turn ON again.

Replace the indoor unit PCB.NO

NO

YES NO

YES

NO

YES

YES

NOReplace the swing motor.

After turning the

swing-flap ON and then stopping

with the remote controller, the voltage of

X6A of the indoor unit PCB is 208~230V when turned

ON again (within 30 seconds of turning ON

again).

When the airflow direction

flap-cam mechanism is disconnected from the swing motor, operation

is normal when turned ON

again.



3.9 Power Supply Voltage Abnormality


FXMQ-PB


Detect error checking the input voltage of fan motor.


When the input voltage of fan motor is 150V or less, or 386V or more.

Supposed Causes

Defective power supply voltageDefective connection on signal lineDefective wiringInstantaneous blackout, others

Troubleshooting

Check the condition of the power supply.(1) Check if power

supply voltage is 208~230V ± 10%.

(2) Check if there is power open phase or defective wiring.

(3) Check if power supply voltage unbalance is within 6V.

YES

There are problems on

the condition of power supply

described above.


Correct any fault.

NO

NO

YES"A8" Reoccurrence of

error.Check and correct each wiring.

It is possible to have external factor, such as brownout and instantaneous blackout.



3.10 Electronic Expansion Valve Coil Abnormality / Dust Clogging


FXFQ


Check coil condition of electronic expansion valve by using micro-computer.Check dust clogging condition of electronic expansion valve main body by using micro-computer.


Pin input for electronic expansion valve coil is abnormal when initializing micro-computer.Either of the following conditions is seen/caused/ occurs while the unit stops operation.

R1T – R2T > 8°C (46.4°F)R2T shows fixed degrees or below.R1T: temperature of suction airR2T: temperature of liquid pipe of heat exchanger

Supposed Causes

Defective of electronic expansion valve coilDefective PCB indoor unitDefective relay cables

Troubleshooting

Refer to P.254.

NO

YES

When power is supplied.

NO

Electronic expansion valve is

connected to X7A of indoor unit

PCB.

NO

Coil check of

electronic expansion valve drive indicates

normal.

NO

YES

YES

YES

Relay cables short circuit or disconnected.

When restarting the operation after shutting the power supply OFF does not work, replace the indoor unit PCB.

Replace the relay cables.

Replace the electronic expansion valve coil.

Shut the power supply OFF after connection and then restart.

Replace the electronic expansion valve main body.

CHECK 9


CHECK 9



3.11 Electronic Expansion Valve Coil Abnormality


Indoor units except FXFQ models


Check coil condition of electronic expansion valve by using micro-computer.


Pin input for electronic expansion valve coil is abnormal when initializing micro-computer.

Supposed Causes

Defective of electronic expansion valve coilDefective PCB indoor unitDefective relay cables

Troubleshooting

Refer to P.254.

NO

YES

YES

Electronic expansion valve is

connected to X7A of indoor unit

PCB.

NO

YES

Coil check of

electronic expansion valve drive indicates

normal.

NO

Relay cables short

circuit or disconnected.

When restarting the operation after shutting the power supply OFF does not work, replace the indoor unit PCB.

Replace the relay cables.

Shut the power supply OFF after connection and then restart.

Replace the electronic expansion valve coil.


CHECK 9

CHECK 9



3.12 Drain Level above Limit

Error Code AFApplicable Models

FXFQ, FXZQ, FXDQ, FXMQ


Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-operation.


When the float switch changes from ON to OFF while the compressor is in non-operation.∗ Error code is displayed but the system operates continuously.

Supposed Causes

Humidifier unit (optional accessory) leakingDefective drain pipe (upward slope, etc.)Defective indoor unit PCB

Troubleshooting

Modify the drain piping.YES

YES

NO

Field drain piping

has a defect such as upward sloping.

NO

A humidifier

unit (optional accessory) is installed

on the indoor unit.

Defective indoor unit PCB.

Check if the humidifier unit is leaking.




3.13 Capacity Determination Device Abnormality

Error Code AJApplicable Models

All indoor models


Capacity is determined according to resistance of the capacity setting adaptor and the memory inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.


When the capacity code is not saved to the PCB, and the capacity setting adaptor is not connected.When a capacity that does not exist for that unit is set.

Supposed Causes

The capacity setting adaptor was not installed.Defective indoor unit PCB

Troubleshooting

Replace the indoor unit PCB.NO

NO

YES

The indoor unit PCB

was replaced with a spare PCB.

YES

The capacity

setting adaptor need to be installed when

replacing the PCB.

Install a capacity setting adaptor.





3.14 Transmission Abnormality between Indoor Unit PCB and Fan PCB

Error Code C1Applicable Models

FXMQ-PB


Check the condition of transmission between indoor unit PCB (A1P) and fan PCB (A2P) using computer.


When normal transmission is not conducted for certain duration.

Supposed Causes

Connection defective the connecter between indoor unit PCB (A1P) and fan PCB (A2P)Defective indoor unit PCB (A1P)Defective fan PCB (A2P)External factor, such as instantaneous blackout

Troubleshooting

Under above field

setting mode, second code No. is

"01".

NO

NO

YES

Replace the fan PCB (A2P).YES

YES

Is the connector

between indoor unit PCB (A1P) and

fan PCB (A2P) accurately

connected? (∗1)

NO

"C1" is displayed

again.

Confirm the condition of transmission on indoor unit PCB using field setting mode. (∗2)

Connect the connecter X70A and turn ON the power again.

Connect it and continue the operation (It is possible to have a cause, such as instantaneous blackout).

Connect the connector accurately.

Replace the indoor unit PCB (A1P).




Note: ∗1. Pull out and insert the connecter once and check it is absolutely connected.∗2. Method to check transmission part of indoor unit PCB.

(1) Turn OFF the power and remove the connecter X70A of indoor unit PCB (A1P).(2) Short circuit X70A.(3) After turning ON the power, check below numbers under field setting from remote controller.

(Confirmation: Second code No. at the condition of first code No. 21 on mode No. 41)↓

∗ After confirmation, turn OFF the power, take off the short circuit and connect X70A back to original condition.

Determination 01: NormalOther than 01: Transmission error on indoor unit PCB



3.15 Thermistor Abnormality

Error Code C4, C5, C9Applicable Models

All indoor models


The error is detected by temperature detected by thermistor.


When the thermistor becomes disconnected or shorted while the unit is running.

Supposed Causes

Defective thermistorDefective indoor unit PCBDefective connector connectionBroken or disconnected wire

Troubleshooting

Note: ∗1. Error code and thermistor

Refer to P.255.

Is the thermistor normal?


5 kΩ to 90 kΩ

Remove the thermistor from the indoor unit PCB, and then insert it again.

Remove the thermistor from the indoor unit PCB, and then make resistance measurement of the thermistor using a multiple meter.

Normal (The error is caused by defective contact.)

YES

NO


YES

Replace the thermistor (∗1).NO

CHECK 11

Error Code Thermistor Except FXTQ FXTQ

C4 Heat exchanger liquid pipe thermistor R2T R1T

C5 Heat exchanger gas pipe thermistor R3T R2T

C9 Suction air thermistor R1T —

CHECK 11



3.16 Combination Error between Indoor Unit PCB and Fan PCB


FXMQ-PB


Check the condition of transmission with fan PCB (A2P) using indoor unit PCB (A1P).


When the communication data of fan PCB (A2P) is determined as incorrect.

Supposed Causes

Defective fan PCB (A2P)Defective connection of capacity setting adaptorField setting error

Troubleshooting

NOIs the

type of fan PCB (A2P)

correct?


Was indoor unit PCB (A1P)

replaced with a spare PCB?

YES

YES

YES

NO

NO

Was correct

capacity setting adaptor installed when replacing it

with a spare PCB?

After establishing transmission for indoor and outdoor units, diagnose the operation again.

After establishing transmission for indoor and outdoor units, diagnose the operation again.

Replace it with correct fan PCB (A2P).

Install correct capacity setting adaptor.



3.17 Remote Sensor Abnormality


FXTQ


The error is detected out by temperature detected by remote sensor.


When the remote sensor becomes disconnected or shorted while the unit is running.

Supposed Causes

Defective indoor unit thermistor (R1T) for air inletDefective indoor unit PCB

Troubleshooting

Refer to P.255.

Is the optional remote

sensor is installed?

Field setting 10(20)-2 is set at

C3.

Connector is connected to X16A of

the indoor unit PCB.

Resistance is normal when measured after

disconnecting the sensor from the indoor unit

PCB.


Set at 03.


NO NO

YES YES


Connect the sensor and turn ON again.

NO

NO

Replace the sensor (R1T).

YES

YES

CHECK 11

CHECK 11




Error Code CAApplicable Models

FXMQ-PB


The error is detected by temperature detected by thermistor.


When the thermistor becomes disconnected or shorted while the unit is running.

Supposed Causes

Defective connector connectionDefective thermistorDefective indoor unit PCB

Troubleshooting


Refer to P.255.

Is the thermistor normal?


5 kΩ to 90 kΩ

Remove the thermistor from the indoor unit PCB, and then insert it again.

Remove the thermistor from the indoor unit PCB, and then make resistance measurement of the thermistor using a multiple meter.

Normal (The error is caused by defective contact.)

YES

NO

Replace the indoor unit PCB.YES

Replace the thermistor (∗1).NOCHECK 11

Error code Thermistor Electric symbol

CA Discharge air thermistor R4T

CHECK 11



3.19 Humidity Sensor System Abnormality

Error Code CCApplicable Models

FXFQ


Even if an error occurs, operation still continues.Error is detected according to the moisture (output voltage) detected by the moisture sensor.


When the moisture sensor is disconnected or short circuited

Supposed Causes

Defective sensorDisconnection

Troubleshooting

Note: ∗1. To delete the history, the ON/OFF button of the remote controller must be pressed and held for 5 seconds in the check mode.

∗2. To display the code, the INSPECTION/TEST Operation button of the remote controller must be pressed and held in the normal mode.

∗3. If "CC" is displayed even after replacing the humidity sensor PCB assy (A2P) and taking the steps ∗1 and 2, replace the indoor unit PCB assy (A1P).


YES

NO

Is "CC" displayed on the

remote controller? (∗2)

YES

NO

Does it function normally?

Remove the humidity sensor from the indoor unit PCB and insert it again.

It is normal.(Poor connector contact)

Replace the humidity sensor PCB assy (A2P).(∗3)

It is believed that external factors (noise or else) other than failure caused the error.

Delete the error code history from the remote controller. (∗1)



3.20 Room Temperature Thermistor in Remote Controller Abnormality

Error Code CJApplicable Models

All indoor models


Error detection is carried out by temperature detected by room temperature thermistor in remote controller.


When the room temperature thermistor in remote controller becomes disconnected or shorted while the unit is running.

Supposed Causes

Defective room temperature thermistor in remote controllerDefective remote controller PCB

Troubleshooting

Note: ∗1. How to delete “the history of error codes”.Press the “ON/ OFF” button for 4 seconds and more while the error code is displayed in the inspection mode.

Clear the error code history. (∗1) (While in inspection mode, press and hold the “ON/OFF” button for a period of 4 seconds or more.)

YESIs "CJ" displayed on the remote

controller?


Replace the remote controller.

External factor other than equipment error.(for example, noise etc.)

NO



3.21 PCB Abnormality

Error Code E1Applicable Models

REYQ-T


Abnormality is detected under the communication conditions in the hardware section between the indoor unit and outdoor unit.


When the communication conditions in the hardware section between the indoor unit and the outdoor unit are not normal

Supposed Causes

Defective outdoor unit PCB (A1P)Defective connection communication line between indoor and outdoor units

Troubleshooting

Return to normal?YES External factor other than

error (for example, noise etc.).

Connect the communication line correctly.

Replace the outdoor unit PCB (A1P).

NO

NO

Check if inside /

outside relay wires of outdoor unit PCB is

disconnected.

YES

Turn OFF the power once and turn ON again.




3.22 Actuation of High Pressure Switch


REYQ-T


Detect continuity across the high pressure switch in the protection device circuit.


When part of the protection device circuit opens.(Reference) Operating pressure of the high pressure switch:

Operating pressure: 4.0 MPa (1338 ftH2O)Resetting pressure: 3.0 MPa (1004 ftH2O)

Supposed Causes

Activation of high pressure switchDefective high pressure switchDefective control PCB (A1P)Momentary power failureDefective high pressure sensor

Troubleshooting

NO

YES

YES

Replace the high pressure switch.

Remedy defective points.

Replace the high pressure sensor.

YES

Are the above 3 points

OK?

Does the error “E3” recur?

NO

Is the operating

pressure of the high pressure switch normal

(4.0 MPa (1338 ftH2O))?

NO

YES

Are the characteristics of the high pressure sensor normal?

(∗1)

NO

(1)Mount a pressure gauge on the high pressure service port.

(2)Reset the operation using the remote controller, and then restart the operation.

A

Check for the following 3 points:(1) Is the stop valve open?(2) Is the high pressure switch connector

properly connected to the control PCB?(3) Is there continuity across the high pressure

switch?




Note: ∗1. Make a comparison between voltage measured by the pressure sensor and that read by the pressure gauge. (The pressure sensor makes measurement of voltage at its connector block to convert it to pressure. )

Refer to P.248.

Refer to P.256.

Refer to P.257.

Replace the control PCB (A1P).

NO

YES

Is the “high pressure”

checked by the Service Checker same as

the measurement of the high pressure

gauge?

-The high pressure sensor is normal, and pressure detection with the control PCB is also normal.

-The high pressure has really become high.

CHECK 1 : Eliminate factors that cause the high pressure to rise.

Connect the Service Checker, and then make a comparison between “high pressure” checked by the Service Checker and the measurement of the high pressure sensor (∗1)

Service Checker CHECK 13

A

CHECK 12

CHECK 1

CHECK 12

CHECK 13



3.23 Actuation of Low Pressure Sensor


REYQ-T


Make judgement of pressure detected by the low pressure sensor with the control PCB.


When low pressure caused a drop while the compressor is in operation:Operating pressure: 0.07 MPa (23.4 ftH2O)

Supposed Causes

Abnormally drop in low pressureDefective low pressure sensorDefective outdoor unit PCBThe stop valve is not opened

Troubleshooting

Note: ∗1. Make a comparison between voltage measured by the pressure sensor and that read by the pressure gauge.(The pressure sensor makes measurement of voltage at its connector block to convert it to pressure. )

Refer to P.249.

Refer to P.256.

Refer to P.257.

YES

NO

NO

YES

Are the characteristics

of the low pressure sensor normal?

(∗1)

NO

YES

(1) Mount a pressure gauge on the low pressure service port.(2) Reset the operation using the remote controller, and then restart the operation.

Is the stop valve open?

- The low pressure sensor is normal, and pressure detection with the control PCB is also normal.- The low pressure has really become low.


Replace the low pressure sensor.

Open the stop valve.

CHECK 2

CHECK 14

Is the “low pressure” checked

by the Service Checker same as the

measurement of the low pressure

gauge?


: Eliminate factors that cause the low pressure to decrease.

Connect the Service Checker, and then make a comparison between “low pressure” checked by the Service Checker and the measurement of the low pressure sensor. (∗1)

Service Checker

CHECK 12

CHECK 2

CHECK 12

CHECK 14



3.24 INV Compressor Motor Lock


REYQ-T


Outdoor unit PCB takes the position signal from UVW line connected between the inverter and compressor, and the error is detected when any abnormality is observed in the phase-current waveform.


When the inverter compressor motor does not operate even by starting it in forced startup mode.

Supposed Causes

Inverter compressor lockHigh differential pressure (0.5 MPa (167.3 ftH2O) or more)UVW connection errorDefective inverter PCBThe stop valve is not opened

Troubleshooting

Make proper wire connections.

Make proper wire connections.

NO

NO

NO

NO

YES

YES

YES

YES

Power OFF

Is the connection

line of the relevant compressor

normal?

Are wire connections

made to phases U, V and W in the proper

order and manner?

Are wire connections

made according to the Wiring Diagram?

U

V

W


8 ~ 14 ton classes are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “E5” while in monitor mode of the outdoor unit PCB.

Replace the connection line, and then securely connect the connector.

Field factor Open the stop valve.


A

Check for the connection wiring.For Compressor 1Connection wiring on the M1C sideFor Compressor 2Connection wiring on the M2C side

Check in Monitor Mode



Refer to P.251.

NO

YES

NO

YES

NO

Power ON

Restart the compressor, and then check for the

operation. Does the error recur?

Has the compressor started

up at high differential pressure (0.5 MPa

(167.3 ftH2O) or more)?

The error recurs at startup.

YESYES

Power OFF

Power OFF

Power ON

Power ON

Power OFF

Pressure equalization failure.Check for the refrigerant system.

Quit work.Pressure equalization failure may have occurred. Check for the refrigerant system.

YES

YES

NO Replace the inverter PCB.

NOThe error recurs at startup.

Continue operation.The error could have resulted from instantaneous power failure.

A

Continue operation.

Replace the inverter compressor.

CHECK 4Is the power

transistor normal?

Replace the inverter PCB.

This is not a failure of the inverter PCB. Reinstall the PCB.

Replace the compressor.YES

NO

NO

The relevant compressor has a

wiring disconnection in it.

The insulation resistance of the relevant

compressor is low (< 100kΩ)

YES

CHECK 4



3.25 Compressor Damage Alarm


REYQ-T


Determine the symptom to be error by detecting the revolutions of the compressor and pressure values detected by the high and low pressure sensors, and further making a comparison between a theoretical current value of the compressor calculated from parameters detected and an actual current value detected by the power transistor.


When a state in which the actual current value of the compressor is abnormally high (by 130% or more) compared to the theoretical current value continues for a period of 30 minutes.∗ In case of a system with multi outdoor units, the system will return an alarm if there is any

operational unit other than that applicable to "E6" or determine to be error if not.

Supposed Causes

Defective compressorDefective high pressure sensorDefective low pressure sensorDefective control PCBDefective inverter PCB

Troubleshooting

NO

YES


of the high pressure sensor normal?

(∗1)

(1) Mount a pressure gauge on the high and low pressure service ports.

(2) Reset the power supply, and then restart the operation.



NO

YES


of the low pressure sensor normal?

(∗1)


Connect the Service Checker, and then make a comparison between “high pressure” and “low pressure” checked by the Service Checker and the measurements of the high and low pressure gauge. (∗1)

Service Checker

A

CHECK 13 CHECK 14



Note: ∗1. Make a comparison between voltage measured by the pressure sensor and that read by the pressure gauge.(The pressure sensor makes measurement of voltage at its connector block to convert it to pressure. )

Refer to P.251.

Refer to P.256.

Refer to P.257.

Refer to P.257.

NO

YES

Are the “high

pressure” and “low pressure” checked by the

Service Checker same as the measurements of the high

and low pressure sensors?


NO Replace the inverter PCB.CHECK 4

Is the power transistor normal?

YES


A

CHECK 12

CHECK 4

CHECK 12

CHECK 13

CHECK 14



3.26 Outdoor Unit Fan Motor Abnormality


REYQ-T


Detect according to the value of current flowing through the inverter PCB (or fan inverter PCB in case of Fan Motor 2).Detect error of the fan motor system according to the fan revolutions detected by the hall IC during the fan motor runs.


When overcurrent is detected from the inverter PCB or the fan inverter PCB (Detecting overcurrent 4 times will shut down the system).When the fan revolutions fall below a given level for a period of 6 seconds while in fan motor rotation mode (Detecting shortage of revolutions will shut down the system).

Supposed Causes

Fan motor failureNeglect to connect or defective connection of harness/connector between the fan motor and the PCBFan does not rotate due to foreign matters caught in it.Clearing condition: fan motor performs normal operation for a period of 5 minutes

Troubleshooting

8 ~ 14 ton classes are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “E7” while in monitor mode of the outdoor unit PCB.


There are foreign matters around the

applicable fan. Remove the foreign matters. YES

Check for the connections of all fan motor connectors.

NO

Turn OFF the power supply, and then wait for a period of 10 minutes.

Some connectors are disconnected.

Insert the connector. YES

NO

NO

There is a junction relay connection error.

Correct the connection of the junction connector.

YES


A

Check for any wire connection errors in 2 units of fan motors. Fan motor 1: Power supply cables and signal cables are all white. Fan motor 2: Power supply cables and signal cables are red on the PCB side and white on the motor side.

Check for Connection of Connector

Check for Colors of Junction Connectors



Refer to P.259.

Refer to P.259.

There is no continuity across the fuse

(F101U) on the fan inverter PCB.

Replace the fan inverter PCB.YES

The fan cannot be

rotated by hand when disconnecting the

connector from the fan motor.

Replace the relevant fan motor.YES

NO

Resistance between the fan

motor power supply cable terminal and the motor frame (metallic part)

is not more than 1MΩ.

Replace the relevant fan motor. YES

NO


Resistance between U, V, W

phases of the fan motor power supply cable has lost

balance or short circuit is caused between U,

V, W phases.

Check for the connector (power supply cable) of the fan motor.

NO

CHECK 16

Replace the fan inverter PCB. YES

The HAP lamp on the inverter

PCB blinks, but does not blink on the fan inverter PCB.


Signal cable has

caused short circuit between Vcc and Gnd,

and between UVW and Gnd.

Turn ON the power supply to check for the following LED lamps.(1) HAP lamp on the compressor inverter PCB (2) HAP lamp on the fan inverter PCB

NO


A

U V W(Red) (White) (Black)

Check for the connector (signal cable) of the fan motor.

NO

CHECK 17Gnd Vcc W V U(Gray) (Pink) (Orange) (Blue) (Yellow)

CHECK 16

CHECK 17



3.27 Electronic Expansion Valve Coil Abnormality


REYQ-T


Detect according to whether or not there is continuity across the electronic expansion valve coils (REYQ-T: Y1E~Y5E).


When no current flows through common (COM[+]) at the time of turning ON the power supply.

Supposed Causes

Disconnection of connectors from electronic expansion valves (REYQ-T: Y1E~Y5E)Defective electronic expansion valve coilDefective outdoor unit control PCB

Troubleshooting

Note: ∗1. Make measurement of resistance between individual pins to ensure that it falls within the range of 40 to 50Ω.

Turn OFF the power supply once, and then turn it ON again.

Return to normal? Investigate external causes other than failures (e.g. noise).

YES

NO

Connector for the electronic

expansion valve of the outdoor unit PCB (A1P)

is connected.

Properly and securely connect the connector.

NO

YES

The resistance of the electronic

expansion valve coil is normal. (∗1)

Replace the electronic expansion valve.

NO

Replace the outdoor unit control PCB (A1P).

YES


Check for electronic expansion valves applicable to the error code "E9" while in monitor mode.Sub code

E09-01/05/08: Y1EE09-03/06/09: Y2EE09-04/07/10: Y3EE09-26/27/28: Y4EE09-29/34/39: Y5E

1

2

3

4

56

1 – 62 – 63 – 64 – 6

40 ~ 50Ω

(White)

(Yellow)

(Orange)

(Blue)

(Red)

Measurement Point

Acceptance Criteria

REYQ-T



3.28 Discharge Pipe Temperature Abnormality

Error Code F3Applicable Models

REYQ-T


Detect according to temperature detected with the discharge pipe or compressor surface temperature thermistor.


When discharge pipe temperature becomes abnormally high (i.e., 135°C (275°F) or more)When discharge pipe temperature sharply rises (remains at 120°C (248°F) or more for a period of consecutive 10 minutes)When compressor surface temperature becomes abnormally high (i.e., 120°C (248°F) or more)When compressor surface temperature sharply rises (remains at 110°C (230°F) or more for a period of consecutive 10 minutes)

Supposed Causes

Abnormal discharge pipe temperatureDefective discharge pipe thermistorAbnormal compressor surface temperatureDefective compressor surface temperature thermistorDefective outdoor unit control PCB



Troubleshooting


Refer to P.250.

Refer to P.255.

NO

Is the “temperature”

checked by the Service Checker same as the measurement of the

temperature?

NO

Replace the relevant thermistor.


YES

YES

Service CheckerConnect the Service Checker, and then make a comparison between “discharge pipe temperature” (or “compressor surface temperature” and “low pressure” checked by the Service Checker and the measurements of discharge pipe surface temperature (or “compressor surface temperature.”) CHECK 11

Connect the Service Checker.Reset the system operation, and then restart it.


of the discharge pipe and compressor surface temperature thermistors

normal? (∗1)

• All thermistors are normal, and temperature detection with the control PCB is also normal.

• The discharge pipe temperature (or compressor surface temperature) has really become high.

CHECK 3 : Eliminate the causes of superheat operation.


Error Code

Applicable Thermistor


REYQ96-120TYDNREYQ96-120TTJU


Electric symbol Connector Electric

symbol Connector Electric symbol Connector

J3

Discharge pipe (M1C) thermistor

R2TX19A

(Group connector)

R21TX19A

(Group connector)

R21T

X19A(Group

connector)


— — R22T R22T

Compressor surface temperature thermistor

R14TX19A

(Group connector)

— — R14T

CHECK 3

CHECK 11



3.29 Wet Alarm


REYQ-T


In cooling operation, detect the condition under which liquid refrigerant returns to the compressor, according to the temperature and pressure of each part.


When the following wet state continues for a period of 90 minutes, an alert is issued. An error is defined for 120 minutes.

Wet state in outdoor units

When the following wet state continues for a period of 45 minutes, an alert is issued.Wet state in some of indoor units

Supposed Causes

Defective suction pipe thermistorDefective discharge pipe thermistorDefective high pressure sensorDefective indoor unit electronic expansion valveDirty air filter

Troubleshooting

Connect the Service Checker.Mount a pressure gauge on the high pressure service port.Reset the operation, and then restart the operation.

Stop the relevant indoor units while the system is in cooling operation, and then check for the liquid pipe temperature of these indoor units after the system is stabilized.

The liquid pipe temperature is low

(equivalent to the evaporating temperature).

Clean the air filters of the indoor units.

NO

YES

NO

Replace the indoor unit electronic expansion valve.

Replace the relevant thermistor.

YES

YES


Are the characteristics of the

accumulator inlet thermistor and the suction pipe thermistor

normal?

NOReplace the discharge pipe thermistor.

Are the discharge pipe

thermistor characteristics normal?

YES

NOReplace the high pressure sensor.

Are the high pressure sensor

characteristics normal?

Service CheckerUse the Service Checker to find indoor units operating under the following conditions:

& • Gas pipe temperature – Liquid pipe temperature < 2.5˚C (4.5˚F)• Electronic expansion valve opening < 300 pulses



3.30 Refrigerant Overcharged


REYQ-T


Detect overcharged refrigerant according to outdoor air temperature, heat exchanging deicer temperature, and liquid pipe temperature during check operation.


When the amount of refrigerant, which is calculated using outdoor air temperature, heat exchanging deicer temperature, and liquid pipe temperature during check operation, exceeds the regular charge amount by 30% or more(If refrigerant is charged slightly over the regular charge amount, "F6" may be displayed on the remote controller.)

Supposed Causes

Refrigerant overchargedDisconnection of outdoor air thermistorDisconnection of heat exchanging deicer thermistorDisconnection of liquid pipe temperature thermistor

Troubleshooting

Refer to P.255.

Check for the conditions of mounting of the temperature sensors of the outdoor air thermistor, the heat exchanger thermistor, and liquid pipe thermistor to the piping.

Disconnect the outdoor air thermistor, the heat exchanger thermistor, and liquid pipe thermistor from the outdoor unit PCB, and then make measurement of resistance using a multiple meter.

Normal?

Remedy refrigerant overcharging.YES

NO

NO

Replace the abnormal thermistors, and then operate the system.

Properly connect the thermistors, and then operate the system.

YES


CHECK 11

Are the temperature sensors properly

mounted?

CHECK 11



3.31 Harness Abnormality (between Control PCB and Inverter PCB)

Error Code H3Applicable Models

REYQ-T


Check for the transmission conditions of the following jumpers between the PCB using micro-computer:Between X28A (Control PCB) and X6A (Inverter PCB)∗1


When normal transmission between PCB is disabled during the compressor stops running.

Supposed Causes

Defective connection of jumpers between PCBDefective control PCB (A1P)Defective inverter PCB

Troubleshooting

Note: ∗1. Control PCB and Inverter PCB

Check for the transmission conditions of the following jumpers between the PCB:Between X28A (Control PCB) and X6A (Inverter PCB)∗1


Replace the inverter PCB.YES

NO

YES

Complete countermeasures.

Return the relevant harness to normal.

NO


Harness error

“H3” error recurs.

PCB REYQ72TYDNREYQ72TTJU


Control PCB A1P A1P

Inverter PCB A3P A3PA6P



3.32 Outdoor Unit Fan Motor Signal Abnormality

Error Code H7Applicable Models

REYQ-T


Detect of abnormal signal from fan motor.


When an abnormal signal is detected at startup of the fan motor operation.

Supposed Causes

Abnormal signal from fan motor (Circuit failure)Disconnection/Short circuit in fan motor leads or disconnection of connectorDefective inverter PCB (A3P, A6P)

Troubleshooting


YES


YES

Turn OFF the power supply.

Check for fan motor applicable to the error code “H7” while in monitor mode.

Sub codeH7-01/05/09: Fan motor 1 (M1F) Master / Slave 1 / Slave 2H7-02/06/10: Fan motor 2 (M2F) Master / Slave 1 / Slave 2

Check for the connector of the fan motor. (∗1)

Replace the inverter PCB. • For Fan motor 1, replace the

inverter PCB A4P. • For Fan motor 2, replace the fan

inverter PCB A7P.


Is the connector of

signal cable of the relevant fan motor

normally connected?

Is resistance

between Vcc and UVW and between GND

and UVW of the fan motor lead in

balance?



Note: ∗1. Procedure for checking for the connector of the fan motor.(1) Turn OFF the power supply. (2) Disconnect the connector (X2A or X502A) from the PCB, and then make measurement of

the following resistance. Acceptance criteria: Resistance between phases falls within the range of ±20%.

GND

Vcc

W

V

U

5 Gray

4 Pink

3 Orange

2 Blue

1 Yellow

Connector for signal cable (X2A or X502A)

Make measurement of resistance between Vcc and UVW and between GND and UVW.




Error Code H9, J3, J5, J6, J7, J8, J9Applicable Models

REYQ-T


Detect according to temperature detected with individual thermistors.


When the system is in operation and the thermistor causes wiring disconnection or short circuit in it.

Supposed Causes

Defective connection of thermistorDefective thermistorDefective outdoor unit PCB

Troubleshooting

Thermistor is connected to the

connector.

Replace the outdoor unit PCB.

Connect the connector and turn ON again.

NO

NO

Replace the thermistor (∗1).

YES

YES


Resistance is normal when measured after

disconnecting the thermistor from the outdoor unit PCB.

CHECK 11(1.8 kΩ to 800 kΩ)



Note: ∗1. Error codes and thermistors

Refer to P.255.

Error Code

Applicable Thermistor




Electric symbol Connector Electric

symbol Connector Electric symbol Connector

H9 Outdoor air R1T X18A R1T X18A R1T X18A

J3


R2TX19A

(Group connector)

R21TX19A

(Group connector)

R21T

X19A(Group

connector)


— — R22T R22T

Compressor surface temperature thermistor

R14TX19A

(Group connector)

— — R14T

J5

Comp. Suction R12T

X15A(Group

connector)R12T

X15A(Group

connector)R12T

X15A(Group

connector)

Suction air R10TX29A

(Group connector)

R10TX29A

(Group connector)

R10TX29A

(Group connector)

J6

H.E, deicer R11TX15A

(Group connector)

R11TX15A

(Group connector)

R11TX15A

(Group connector)

H.E. gas R8TR9T

X29A(Group

connector)

R8TR9T

X29A(Group

connector)

R8TR9T

X29A(Group

connector)

J7Receiver inlet R3T X30A

(Group connector)

R3T X30A(Group

connector)

R3T X30A(Group

connector)Subcooling H.E. liquid R7T R7T R7T

J8 H.E. liquid R4TR5T

X30A(Group

connector)

R4TR5T

X30A(Group

connector)

R4TR5T

X30A(Group

connector)

J9

Subcooling H.E. gas R6T

X30A(Group

connector)R6T

X30A(Group

connector)R6T

X30A(Group

connector)

Receiver gas purge R13T X17A R13T X17A R13T X17A

CHECK 11



3.34 High Pressure Sensor Abnormality

Error Code JAApplicable Models

REYQ-T


Detect according to temperature detected with the high pressure sensor.


When the high pressure sensor causes wiring disconnection or open circuit (at pressure of not less than 4.22 MPa (1412 ftH2O) or not more than 0.01 MPa (3.3 ftH2O)).

Supposed Causes

Defective high pressure sensorConnection of low pressure sensor in mistake for high pressure sensorDefective outdoor unit PCBDefective connection of high pressure sensor

Troubleshooting

Refer to P.256.

Refer to P.257.

Are the characteristics of

the high pressure sensor normal? (Make a comparison

between voltage characteristics (∗) and gauge pressure.)


Replace the control PCB.

NO

Is the PCB detection pressure normal? Make a

comparison between data on pressure checked by the Service Checker

and the voltage characteristics. Replace the control PCB.NO

Are the characteristics of the high pressure sensor

normal?Replace the high pressure sensor.

NO

YES

YES

YES

Reset the operation, and then restart it.

(1) Mount a pressure gauge on the high pressure service port.

(2) Connect the Service Checker for VRV systems.


CHECK 12

CHECK 13

CHECK 12

CHECK 13

CHECK 12

CHECK 13



3.35 Low Pressure Sensor Abnormality

Error Code JCApplicable Models

REYQ-T


Detect according to temperature detected with the low pressure sensor.


When the low pressure sensor causes wiring disconnection or open circuit (at pressure of not less than 1.77 MPa (592 ftH2O) or not more than –0.01 MPa (–3.3 ftH2O)).

Supposed Causes

Defective low pressure sensorConnection of high pressure sensor in mistake for low pressure sensorDefective outdoor unit PCBDefective connection of low pressure sensor

Troubleshooting

Refer to P.256.

Refer to P.257.

Are thecharacteristics of

the low pressure sensor normal? (Make a comparison

between voltage characteristics and gauge pressure.)


Replace the control PCB.

NO

Is the PCB detection pressure

normal? Make a comparison between data on pressure checked

by the Service Checker and the voltage characteristics.

Replace the control PCB.NO

Are the characteristics of the low pressure sensor

normal?Replace the low pressure sensor.

NO

YES

YES

YES

Reset the operation, and then restart it.

(1) Mount a pressure gauge on the low pressure service port.

(2) Connect the Service Checker for VRV systems.


CHECK 12

CHECK 14

CHECK 12

CHECK 14

CHECK 12

CHECK 14



3.36 Inverter PCB Abnormality

Error Code L1Applicable Models

REYQ-T


Detect according to current value detected during the output of waveform before compressor startupDetect according to current value detected with the current sensor during sync operation for startup


When overcurrent (OCP) flows during the output of waveformWhen the current sensor error during sync operationWhen IPM error occurs

Supposed Causes

Inverter PCBIPM failureCurrent sensor failureDrive circuit failure



Troubleshooting

Refer to P.251.

Is the insulation to

ground resistance of the relevant compressor

100kΩ or more?

The error could have resulted from external factors other than failures (e.g. external noise or thunder).

YES

Replace the compressor and the compressor inverter PCB together.


NO

NO

YES

Replace the compressor inverter PCB and the fan inverter PCB (A4P).


NO

YES

Turn OFF the power supply once, and then turn it ON again.

All classes (except REYQ72T) are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “L1” while in monitor mode of the outdoor unit PCB.

NO

YES


Return to normal?

CHECK 4Is the power

transistor normal?


CHECK 4Is the power

transistor of the fan driver normal?

CHECK 4



3.37 Reactor Temperature Rise Abnormality


REYQ-T


Detect according to the value detected with the reactor surface thermistor.


When the temperature detected with the reactor surface thermistor is more than the specified temperature.

Supposed Causes

Defective connection of harnessDefective reactor surface thermistorDefective inverter PCB

Troubleshooting

Is reactor

harness connected to the terminal strip

correctly?

Is the wiring

disconnection in the reactor thermistor?

NO

YES

YES

NOConnect the harness correctly.

Replace the thermistor.





3.38 Inverter Radiation Fin Temperature Rise Abnormality


REYQ-T


Detect temperature of power module of the compressor inverter PCB.


Thermistor located inside the power module of the inverter PCB for compressor and fan motor.Cooling tube plate poor heat-exchange.

Supposed Causes

Cooling tube plate not fixed with screws“U0” errorDefective inverter PCBHigh outdoor air temperature

Troubleshooting

Continue operation. Field factor. Power module temperature may have risen due to high outdoor air temperature.

Turn ON the power supply, and

then press the ON button continuously. Does

the error recur?

Replace the inverter PCB.YES

Rectify troubles.Normal?NO

NO

Check for the cooling conditions of cooling tube used to cool the inverter.(1) Is the cooling tube plate

fixed with screws?(2) Error code “U0” is

displayed on the Error History screen.

YES






3.39 INV Compressor Instantaneous Overcurrent


REYQ-T


Detect current flowing through the power transistor.


When instantaneously overcurrent flows through the power transistor.

Supposed Causes

Defective compressor coil (such as wiring disconnection or insulation failure)Compressor startup failure (mechanical lock)Defective inverter PCB

TroubleshootingCompressor inspection

Power OFF


YES

NOIs the stop valve open?

YES

YES

Are wiring and wire

connections to the relevant compressor

normal?

Rectify the wiring and wire connections.

NO




Check for the leads of the compressor.

For Compressor 1Leads on the M1C side


Are the leads of the relevant

compressor normal?

Replace the leads of the relevant compressor.

NO

A



Refer to P.251.

Power OFF

YES

NO

Restarting the system results in the

recurrence of the error.

Continue operation.


NO

YES

Replace the inverter PCB

YES



Continue operation.The error could have resulted from causes such as instantaneous power failure.

NO

The insulation

resistance of the relevant compressor is 100kΩ

or less.


YES

The coil of the relevant

compressor has caused wiring disconnection

in it.


YES

NO


NOCHECK 4Is the power

transistor normal?

( )

Power OFF

A

CHECK 4



3.40 INV Compressor Overcurrent


REYQ-T


Detect current flowing through the power transistor.


When the secondary-side inverter current exceeds.

Supposed Causes

Compressor overloadedWiring disconnection in compressor coilDisconnection of compressor wiringDefective inverter PCB

Troubleshooting

Power OFF


YES

NOIs the stop valve open?

YES

YES

Are wiring and wire

connections to the relevant compressor

normal?

Rectify the wiring and wire connections.

NO




Check for the leads of the compressor.



Are the leads of the relevant

compressor normal?

Replace the leads of the relevant compressor.

NO

A



Refer to P.251.

Power OFF

YES



Continue operation.


NO

YES

Replace the inverter PCB




NO

( )

A

NO

YES

The insulation

resistance of the relevant compressor is

1MΩ or less to ground.


YES

The coil of the relevant

compressor has caused wiring disconnection

in it.


YES

NO


NOCHECK 4Is the power

transistor normal?

Power OFF

CHECK 4



3.41 INV Compressor Startup Abnormality


REYQ-T


Detect error according to the signal waveform of compressor.


When compressor startup operation has not been completed.

Supposed Causes

The stop valve is not openedDefective compressorError in wire connections to compressorLarge differential pressure before compressor startupDefective inverter PCB



Troubleshooting

YES

NO

NO

Apply power, and then restart operation.

NO

Are the leads of the compressor

disconnected?Connect the leads of the compressor.

YES

Is the insulation

resistance of the relevant compressor 100kΩ

or more?

Eliminate the melting state of refrigerant.

NO

YES

YES

YES

Refrigerant is melting (No power

applied for a period of 6 hours or more)


YES





Startup for the first time after

installation?

Is a proper amount of refrigerant

charged?

Open the stop valve.NO

Charge a proper amount of refrigerant.

NO

Go to the next page. (Startup failure in aging operation)



Refer to P.251.

YES

Recheck for the compressor and the refrigerant system.

NO

Replace the compressor inverter PCB.NO

YES

NO

There is wiring disconnection in

the compressor.Replace the inverter compressor.

YES

Is the insulation

resistance of the relevant compressor

100kΩ or more?

Refrigerant is melting (No power

applied for a period of 6 hours or more)

Replace the inverter compressor.NO


YES

From the previous page (Startup failure in aging operation)

CHECK 4Is the power

transistor normal?

CHECK 4



3.42 Transmission Error between Inverter and Control PCB

Error Code LCApplicable Models

REYQ-T


Check for the transmission conditions between the inverter PCB and the control PCB using a micro-computer.


When normal transmission is disabled for a given period of time or more.

Supposed Causes

Defective connection between the inverter PCB and the control PCBDefective control PCB (transmission block)Defective noise filterExternal factors (e.g. noise)Defective inverter compressorDefective fan motor

Troubleshooting

Is the type of the

relevant inverter PCB 1 correct?

Replace with a proper PCB.NO

Properly Connect the connectorNO

YES


NO

The insulation

resistance of the relevant inverter compressor is

not more than 100kΩ.

The insulation resistance of the

relevant fan motor is not more than

1MΩ.

Replace the inverter compressor.YES

NO

YES


Is the connector

between each control PCB and each inverter PCB securely

connected? (∗1)

All classes (except REYQ72T) are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “LC” while in monitor mode of the outdoor unit PCB.


A



Note: ∗1. Connect and disconnect the connector once to ensure that it is securely connected.

Replace all of the INV, FAN, and NF boards.

YES

This is not the LC error.Recheck the error code.

NO

YES

The micro-computer normal

monitor indication lamp (green) on the control

PCB (A1P) is blinking.

Replace the inverter PCB.NO NO

YES

The micro-computer normal

monitor indication lamp (green) on the control

PCB (A1P) is blinking.


YES

Is the connector

between the control PCB and the sub PCB

securely connected?

Properly connect the connector X9A (X10A) on the sub PCB option.

NOIs the

normal operation indication LED on the sub

PCB blinking?

YES

NO

Replace the control PCB (A1P).YES

The fuse of the NF board has

blown out.


The LC error recurs.

A



3.43 Power Supply Voltage Imbalance

Error Code P1Applicable Models

REYQ-T


Detect voltage imbalance through PCB.


When power supply voltage imbalance exceeds approximately 12 V.

Error is not decided while the unit operation is continued.“P1” will be displayed by pressing the inspection button.

Supposed Causes

Open phaseInterphase voltage imbalanceDefective capacitor in the main circuitDefective inverter PCBDefective magnetic relayDefective wiring in the main circuit



Troubleshooting

Note: ∗1. Make measurement of voltage at the power supply terminal block (X1M).∗2. Make measurement of voltage at the L1, L2 and L3 terminals of diode module located on the

inverter PCB during the compressor is in operation.

Is supply voltage imbalance over approximately

12 V?

Correct the open phase of power supply.

Open phase?

Is the imbalance of voltage

applied to the inverter over approximately

12 V? (∗2)

Rectify the power supply voltage imbalance.Take countermeasures (listed below).

YES YES

NONO

NO

Take countermeasures.

Defective noise filter, magnetic relay, or wiringTurn OFF the power supply, and then check and repair wirings in the main circuit and defective components.(1) Loose contact and wiring

disconnection between the power supply and the inverter

(2) Adhesion, meltdown, or loose contact of magnetic relay

(3) Wiring disconnection in or loose contact of noise filter


YES

Explanation to users ∗ Use the document “Notice of Inspection Results” attached to spare part.

Hand the “Notice of Inspection Results” to user to ask him/her to rectify the imbalance.

Be sure to explain user that “power supply voltage imbalance” will occur and Daikin accepts no responsibility for the imbalance.

Use equipment capable of constantly recording power supply voltages (e.g. Memory Hicoder) to record power supply voltages between phases (R-S, S-T, and R-T) for a period of consecutive 1 week.

Power supply voltage imbalance Even though power supply voltage remains balanced when making measurement, it often becomes imbalanced during night-time (from 18:00 to 22:00).

Even though the power supply voltage is normal, the error recurs.

<If voltage can be monitored>


Check in Monitor Mode8 ~ 14 ton classes are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “P1” while in monitor mode of the outdoor unit PCB.



3.44 Reactor Temperature Abnormality


REYQ-T


Detect according to the value detected with the reactor surface thermistor.


When the system is in operation and the thermistor causes wiring disconnection or short circuit in it.

Supposed Causes

Defective connection of thermistorDefective reactor thermistorDefective inverter PCB

Troubleshooting

Check in Monitor ModeAll classes (except REYQ72T) are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “P3” while in monitor mode of the outdoor unit PCB.

Make measurement of resistance of the radiation fin thermistor.

Is the resistance of the

thermistor normal?

Turn ON the power supply.Does the error

recur?NO

YES

YES

NOReplace the inverter PCB.


Continue operation.




3.45 Inverter Radiation Fin Temperature Abnormality


REYQ-T


Detect the resistance of the following thermistors during the compressor stops running:Radiation fin thermistor.Thermistor located in PCB circuit.Heat sink thermistor.


When the resistance of the thermistor comes to a value equivalent to open or short circuit.

Error is not decided while the unit operation is continued."P4" will be displayed by pressing the inspection button.

Supposed Causes

Defective radiation fin temperature thermistorDefective inverter PCBDefective INV compressorDefective fan motor

Troubleshooting

Check in Monitor ModeAll classes (except REYQ72T) are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “P4” while in monitor mode of the outdoor unit PCB.

Make measurement of resistance of the radiation fin thermistor.

Is the resistance of the

relevant thermistor normal?

The insulation

resistance of the relevant inverter compressor

is not more than 100kΩ.

The insulation resistance of the relevant

fan motor is not more than 1MΩ.

Turn ONthe power supply.

Does the error recur?

NO

YES

NO

YES

NO

YES

YES



Replace the fan motor.


Continue operation.




3.46 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality

Error Code PJApplicable Models

REYQ-T


This error is detected according to communications with the inverter PCB.


Make judgement according to communication data on whether or not the type of the inverter PCB is correct.

Supposed Causes

Mismatching of type of PCBImproper (or no) field setting after replacing outdoor unit main PCB

Troubleshooting

Check in Monitor ModeAll classes (except REYQ72T) are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “PJ” while in monitor mode of the outdoor unit PCB.

Is the type of the

compressor inverter PCB correct?

Is the type of the fan inverter PCB

correct?

Has the DIP switch

setting been made properly to replace the

control PCB?

Does the “Under Preparation”

indication lamp (H2P) on the control PCB

turn OFF?

YES

YES

NO

NO

YES

YES

NO

NO

Replace with a correct compressor inverter PCB.

Replace with a correct fan inverter PCB.

Properly make DIP switch setting.(After completion of setting, reset the power supply.)

Modify the connection wiring.

Replace the outdoor unit control PCB.




3.47 Refrigerant Shortage

Error Code U0Applicable Models

REYQ-T


Detect refrigerant shortage according to a low pressure level or a difference in heat exchanging temperature from the suction pipe.


Low pressure becomes 0.1 MPa (33.5 ftH2O) or less.∗ Error is not determined. The unit continues the operation.

Supposed Causes

Refrigerant shortage and refrigerant clogging (wrong piping)Defective thermistorDefective low pressure sensorDefective outdoor unit main PCB

Troubleshooting

Note: ∗1. Check the low pressure value by using pressure gauge in operation. ∗2. Compare the actual measurement value by pressure sensor with the value by the pressure

gauge.(To gain actual measurement value by pressure sensor, measure the voltage at the connector [between (2)-(3)] and then convert the value into pressure. )

Refer to P.249.

Refer to P.256.

Is the low pressure 0.1 MPa

(33.5 ftH2O) or less? (∗1)

Is the characteristics of

low pressure sensor normal? (∗2)


Replace the outdoor unit main PCB (A1P).

NONO

YES YES

Remove the factor of decreasing low pressure.CHECK 2


(1) Mount a pressure gauge at the service port on the low pressure side.

(2) Reset the operation using the remote controller then

CHECK 12

CHECK 2

CHECK 12



3.48 Reverse Phase, Open Phase


REYQ-T


The phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged.


When a power supply is reverse phase, or T phase is open phase.

Supposed Causes

Power supply reverse phaseT phase open phaseDefective outdoor unit PCB (A1P)

Troubleshooting

There is an open

phase at the power supply (T phase) terminal

section (X1M) of the outdoor unit.

Operation is normal if one

phase of power supply line phase is

replaced.

Fix the open phase. Requires inspection of field power supply section.

Reverse phase.Countermeasure of the problem is completed by phase replacement.


YES

YES

NO

NO




3.49 Power Supply Insufficient or Instantaneous Abnormality


REYQ-T


Detect the voltage of capacitor of the main circuit in the inverter PCB.


When the voltage in the DC circuit (between diode module and power module) falls below 380VDC.

Supposed Causes

Abnormal power supply voltageInstantaneous power failureOpen phaseDefective inverter PCBDefective control PCBDefective compressorDefective main circuit wiringDefective fan motorDefective connection of signal cable

Troubleshooting

Check in Monitor ModeAll classes (except REYQ72T) are equipped with 2 compressors.Check for the compressor 1 or 2 applicable to the error code “U2” while in monitor mode of the outdoor unit PCB.

There aresome defects in the

power supply conditions aforementioned.

The insulation resistance of the

compressor is not more than 100kΩ.

NO

YES

YES

Remedy the defects.

Replace the compressor.

Check for power supply conditions.(1) Power supply voltage falls

within the range of 380 to 415V?

(2) Any open phase in the power supply wiring or any wrong wiring?

(3) Imbalance in the power supply voltage is maintained within 12V?

A

NO




Refer to P.251.

The inverter PCB

(A3P, A6P) has damage.

The system enters

standby mode before the outdoor unit fan starts

rotating.

The system enters

standby mode before completing the startup

operation of the compressor.

The error “U2” recurs.

NO

NO

YES

YES

NO

YES

NO

YES


Check for wirings.

Turn ON the power supply, and then press the ON button.

Replace the inverter PCB.If the inverter PCB gets severely damaged, the compressor and the fan motor may have been damaged.

Replace the inverter PCB.If the inverter PCB gets severely damaged, check for the compressor.


A

Is the power transistor normal?

YES


Connect and disconnect the following connectors:(1) X4A (Inverter PCB)↔X20A

(Control PCB)(2) X6A (Inverter PCB)↔X28A

(Control PCB)

CHECK 4

The insulation resistance of the fan

motor is not more than 1MΩ.

NO

YESReplace the fan motor.

If the motor gets severely damaged, the inverter PCB (A3P, A6P) should also be replaced.

CHECK 4



3.50 Check Operation is not Executed


REYQ-T


Check operation is executed or not executed


Error is decided when the unit starts operation without check operation.

Supposed Causes

Check operation is not executed.

Troubleshooting

The contents of individual failures vary with sub code. Ensure the sub code, and then go to the following:

Conduct the test operation. (The test operation has not been conducted.)

U3-03

Check for the refrigerant piping, and then conduct the test operation.

U3-04

Conduct the test operation (due to the premature end of the test operation).

U3-05

Conduct the test operation (due to the premature end of the test operation).

U3-06

Check for transmission between indoor and outdoor units, and then conduct the test operation.

U3-07

Check for transmission between indoor and outdoor units, and then conduct the test operation.

U3-08




3.51 Transmission Error between Indoor Units and Outdoor Units


All indoor modelsREYQ-T


Micro-computer checks if transmission between indoor and outdoor units is normal.


When transmission is not carried out normally for a certain amount of time

Supposed Causes

Short circuit in indoor-outdoor or outdoor-outdoor transmission wiring (F1 / F2), or wrong wiringOutdoor unit power supply is OFFSystem address does not matchDefective indoor unit PCBDefective outdoor unit PCB



Troubleshooting

Do all indoor unit

remote controllers in the same refrigerant

system display “U4”?

Are the indoor-outdoor and

outdoor-outdoor transmission wirings

normal?

Fuse on the outdoor unit PCB

has blown out.

Does the seven-segment

display show (1) or (2)? (∗1)

The lamp does not turn

OFF for a period of 12 minutes or more.

Are the indoor-outdoor

and outdoor-outdoor transmission wirings

normal?

Is voltage between L1 and N

terminals of the outdoor unit PCB 380 to 415 V?

Does the micro-computer normal monitor

indication lamp (HAP) on the outdoor

unit PCB

Has the indoor or

outdoor unit PCB been replaced, or has the indoor-outdoor or

outdoor-outdoor transmission wiring been modified?

Disconnect the outdoor-outdoor transmission wiring.

Does the system normally operate with a single

transmission line?

U4-01

∗1. :OFF :ON :BLINK

SEG1 SEG2 SEG3 (1)

(2)

Correct the voltage (230 V).

Replace the fuse.

Modify the transmission wirings.

Press and hold BS3 on the outdoor unit control PCB for a period of 5 seconds or more.


Mount the DIII-NET extension adaptor.

YES

NO

YES

YES


Press and hold BS3 on the master outdoor unit control PCB for a period of 5 seconds or more. (The system will not operate for a period of 12 minutes at maximum.)

Modify the transmission wirings.

YES

Go to the next page.U4-03(Indoor unit system transmission error)

NO

NO

NO

Replace the outdoor unit PCB.

NO

YES

NO

NO

NO

NO

NO

YES

NO

Reset the power supply once.

YES

YES

YES

Check for details of error in monitor mode.

YES

YES




Indication after launch test operation?

U4-03

The PCB of indoor units displaying “U9” are normal.Check for indoor units of other systems to troubleshoot them according to relevant error codes.

NO

YES

Check controller indoor units : (1) Some error about

thermistor, or fan motor, electronic expansion valve, or defective board.

(2) Test operation was interrupted by button BS1 "Mode".

YES

Check all indoor error indication.

NO

Operate all indoor units.

YES

Do all units display “U9”?

Carry out the diagnosis again after a lapse of 2 minutes or more.

NODid 2 minutes or more elapse after “U9” is

displayed?



3.52 Transmission Error between Remote Controller and Indoor Unit


All indoor models


Micro-computer checks if transmission between indoor unit and remote controller is normal.



Supposed Causes

Transmission error between indoor unit and remote controllerConnection of 2 main remote controllers (when using 2 remote controllers)Defective indoor unit PCBDefective remote controller PCBTransmission error caused by noise

Troubleshooting

Using 2 remote controllers

control.

SS1 of both remote controllers is set

to "MAIN".

All indoor unit PCB micro-computer

monitors blink.

Operation returns to normal when the power is turned OFF

momentarily.

NO

NO

NO

YES

NO


Set 1 remote controller to "SUB"; turn the power supply OFF once and then restart.

There is possibility of error caused by noise. Check the surrounding area and turn ON again.

There is possibility of error caused by noise. Check the surrounding area and turn ON again.

Normal

Normal

NO NO

YES YES

YES

Replace the remote controller.

Normal

YES


Normal

YES




3.53 Transmission Error between Outdoor Units


REYQ-T


Micro-computer checks if transmission between outdoor units is normal.



Supposed Causes

Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor unitConnection error of transmission wirings between outdoor unitsCool/Heat selection setting errorCool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit)Defective outdoor unit PCBDefective external control adaptor for outdoor unit



Troubleshooting

Go to Diagnosis Flowchart-1. (Transmission error when the external control adaptor is mounted)

Ensure the sub code or the lamp display of monitor mode, and then go to the following:


Go to Diagnosis Flowchart-2. (Transmission error when the external control adaptor is mounted)

Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

Go to Diagnosis Flowchart-3. (Transmission error between master and slave 1)

Go to Diagnosis Flowchart-4. (Transmission error between master and slave 2)

Go to Diagnosis Flowchart-5. (Multi system error)

Go to Diagnosis Flowchart-6. (Manual address setting error for slave 1, 2)

Go to Diagnosis Flowchart-7. (Connection 4 or more outdoor units to the same system)

Go to Diagnosis Flowchart-8. (Connection of excess indoor units for test operation)

U7-01

U7-02

U7-03

U7-04

U7-05

U7-06

U7-07

U7-11



NO

NO

YES

YES

NO

YES

YES

Connect the power supply cable of the external control adaptor for outdoor unit to the 16 VDC power supply line.


Replace the external control adaptor PCB.


NO

NO

YES

Modify the transmission wirings to the external control adaptor for outdoor unit.

Diagnosis Flowchart-1

Supply power to the outdoor unit.

Is power supplied to the outdoor unit?

Is the normal

operation monitor LED on the outdoor unit

control PCB blinking?

Is the normal

operation monitor LED on the external control

adaptor for outdoor unit blinking?

(Transmission error when the external control adaptor is mounted)

Is the power

supply cable of the external control adaptor for outdoor unit connected

to the 16 VDC power supply

line?

Is there any

wiring disconnection or wiring error in the transmission wirings to the external

control adaptor for outdoor unit?

Error code Sub codeU7-01



Unified Cool/ Heat selection

Cool/Heat selection for the

external control adaptor for outdoor unit is set to

“Unified Master”.

Cool/Heat selection for the

external control adaptor for outdoor unit is set

to “Unified Slave”.

Is the normal

operation monitor LED on the outdoor unit

control PCB blinking?

Is power supplied to the outdoor unit?

Is the power supply cable of the

external control adaptor for outdoor unit connected to

the 16 VDC power supply line?

Is the normal

operation monitor LED on the external control

adaptor for outdoor unit blinking?

Does the error recur when setting Cool/Heat

selection for the external control adaptor for

outdoor unit to “IND”?

NO

NO

NO NO

NONO

NO

NO

YES

YES

YES

YES

YESYES

YES

YESReplace the outdoor unit control PCB.

Replace the external control adaptor for outdoor unit PCB.

Connect the power supply cable of the external control adaptor for outdoor unit to the 16 VDC power supply line.


Supply power to the outdoor unit.


Unified Cool/Heat addresses for outdoor units in the outdoor-outdoor transmission are duplicated. Make address setting again.

Set Cool/Heat selection for the external control adaptor for outdoor unit to “IND.”


(Transmission error when the external control adaptor for outdoor unit is mounted)




YES

NO

YES

NO

The multi transmission

wirings to multi slave 2 have caused wiring disconnection in

them or are being disconnected.

Replace the outdoor unit control PCB for multi slave 2.

Disconnect the outdoor unit multi transmission wirings, and then reset the power supply.


YES

NO

The multi transmission

wirings to multi slave 1 have caused wiring disconnection in

them or are being disconnected.

Modify the outdoor unit multi transmission wirings, and then reset the power supply.

Replace the outdoor unit control PCB for multi slave 1.



(Transmission error between master and slave 1)



(Transmission error between master and slave 2)



(Multi system error)


Is the model of outdoor unit REYQ-T?



YES

NO

YES

NO

4 or more outdoor

units are connected using the outdoor unit multi

transmission wirings.

YES

YES

There is an error in

the connection of indoor-outdoor, indoor-indoor,

and outdoor multi transmission

wirings.






Rectify the error in the connection of transmission wirings, and then reset the power supply.

One of outdoor unit

multi transmission wirings has caused wiring disconnection in it

or been disconnected.

NO

The capacity to

connect indoor units falls within the specified

range.

Check the capacity to connect indoor units.


(Manual address setting error for slave 1, 2)



(Connection 4 or more outdoor units to the same system)



(Connection of excess indoor units for test operation)


NO



3.54 Transmission Error between Main and Sub Remote Controllers


All indoor models


In case of controlling with 2 remote controller, check the system using micro-computer if signal transmission between indoor unit and remote controller (main and sub remote controller) is normal.


When transmission is not carried out normally for a certain amount of time.

Supposed Causes

Transmission error between main and sub remote controllerConnection between sub remote controllersDefective remote controller PCB

Troubleshooting

SS1 of both remote controllers is set to

"SUB".

SS1 of remote controller PCB is

set to "MAIN".Set SS1 to "MAIN"; the power supply OFF once and then restart.

Set 1 remote controller to "MAIN"; the power supply OFF once and then restart.

Turn the power OFF and then restart. If an error occurs, replace the remote controller PCB.YES

YESYES

NO

NO

NOUsing 2 remote controllers control.




3.55 Transmission Error between Indoor and Outdoor Units in the Same System




Detect the error signal for the other indoor unit within the circuit by outdoor unit PCB.


When the error decision is made on any other indoor unit within the system concerned

Supposed Causes

Transmission error between other indoor and outdoor unitsDefective electronic expansion valve of other indoor unitDefective indoor unit PCB of other indoor unitImproper connection of transmission wiring between indoor and outdoor unit

Troubleshooting

"U9" has been displayed for 2

minutes or more.

The outdoor unit PCB indicated by the error code “U9” is normal.Check for the indoor unit of other system, and then conduct troubleshooting by diagnosis according to the Error Code Flowchart.

Re-diagnose by display after passage of 2 minutes or more.

NO

Turn ON all indoor units.

YES

YES

Continue the operation.NOAll the units are

display "U9".




3.56 Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller

Error Code UAApplicable Models



A difference occurs in data by the type of refrigerant between indoor and outdoor units.The number of indoor units connected is out of the allowable range.


The error decision is made as soon as either of the abnormalities aforementioned is detected.

Supposed Causes

Excess of connected indoor unitsDefective outdoor unit PCBMismatch of the refrigerant type of indoor and outdoor unit.Setting of outdoor unit PCB was not carried out after replacing to spare PCB.

Troubleshooting

Ensure the sub code or the lamp display of monitor mode, and then go to the following:


Go to Diagnosis Flowchart-1. (Connection of excess indoor units)

Go to Diagnosis Flowchart-2. (Connection of incorrect models of indoor units)

Go to Diagnosis Flowchart-3. (Improper combination of outdoor units)

Go to Diagnosis Flowchart-4. (Wrong connection)

Go to Diagnosis Flowchart-5. (Multi system combination error)

UA-17Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

Error code Sub code

UA-18

UA-20

UA-21

UA-31



NO

YES

The number of indoor

units connected to the same system is not

more than 64.


NO

YES

Check if the refrigerant type of the outdoor unit

corresponds to that of the indoor

unit.

Excess indoor units are connected.Check for the connection to connect the proper number of indoor units.


Match the refrigerant types of the outdoor unit and the indoor unit.


UA-17Error code Sub code


Error code Sub code

UA-18

NO

YES

YES

YES

NO

NO


Check for the model of outdoor unit.

Make setting again, and then reset the power supply.

Replace the spare PCB.

NO

YES


Was the outdoor unit PCB

replaced with a spare PCB?

A different model of outdoor unit is

connected.


Error code Sub code

UA-20

Multi connection?

Was proper setting of spare PCB made?



YES

YES

NOMake setting again, and then reset the power supply.


NOCorrect the multi combination of outdoor units.




Is the multi combination of outdoor units

proper?

NOWas the

outdoor unit PCB replaced with a spare

PCB?Replace the outdoor unit PCB (A1P).

YESYES

YESYES

NOIs the

procurement of the spare PCB proper?

Procure a proper spare PCB.

Is the setting of the spare PCB proper?

Error code Sub code

UA-21

Error code Sub code

UA-31



3.57 Address Duplication of Centralized Control Equipment

Error Code UCApplicable Models

All indoor modelsCentralized control equipment


The principal indoor unit detects the same address as that of its own on any other indoor unit.


The error decision is made as soon as the abnormality aforementioned is detected.

Supposed Causes

Address duplication of centralized control equipmentDefective indoor unit PCB

Troubleshooting

Make setting change so that the centralized address will not be duplicated.

The centralized address is duplicated.




3.58 Transmission Error between Centralized Control Equipment and Indoor Unit

Error Code UE Applicable Models

All indoor models Schedule timerCentral remote controller


Micro-computer checks if transmission between indoor unit and centralized control equipment is normal.



Supposed Causes

Transmission error between optional controllers for centralized control equipment and indoor unitConnector for setting main controller is disconnected.(or disconnection of connector for independent / combined use changeover switch.)Defective PCB for central remote controllerDefective indoor unit PCB

Troubleshooting

Is the power supply of

the indoor unit, on which the “UE” occurred,

turned ON?

For VRV systems,

can the setting of central control group No. be

made in one and the same refrigerant

system?

Has the setting of

central control group No. been made with the indoor unit on which the

“UE” occurred?

Can the setting of central

control group No be made?

Check the indoor

unit for which “UE” is displayed. Is the

transmission error “UE” caused on all indoor units?

Was the central control

group No. for indoor unit changed?

Make correct setting of the central control group No.

Check outdoor units to which the refrigerant system is connected.

Check whether or not there are no problems with the transmission wiring length, types of cables and wires, number of units connected, and others. If no problems, replace the indoor unit PCB.

NO

YES

Continued to A (on the following page)

YES

NO

NO

YES

Make sure there are no hazardous situations, and then turn ON the power supply.

NO

NO

YES

YES

NO

YES

Reset the power supplies of every centralized control equipment.For the intelligent Touch controller, register the air conditioner again while in DIII-NET test run menu.




Refer to P.258.

Check the

transmission wiring between main centralized control

equipment for any broken wire. For details, refer to

information in the “Procedure for

checking broken wires”

section.

Check the transmission wiring between centralized

control equipment for any broken wire. For details, refer to information in

the “Procedure for checking broken wires” section.

Is the voltage

between the terminals F1 (+) and F2 (-)

in the range of 15.2 to 17.6 VDC?

Replace the centralized control equipment.

Centralized control equipment: Normal

Normal

Correct the wiring.Abnormal

A

NO

Correct the wiring.Abnormal

YES

YESDisconnect the transmission wiring of the main centralized control equipment, and then check the voltage between the transmission terminals (F1 and F2) of the master unit transmission equipment using a multiple meter.

It is supposed that the error results from external factors (e.g. noises) from other equipment.

CHECK 15

Has the main

centralized control equipment setting connector

been connected?

Normal

Correct the connection of the connector.

NO

CHECK 15



3.59 System is not Set yet

Error Code UFApplicable Models



On check operation, the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature.


The error is determined as soon as the abnormality aforementioned is detected through checking the system for any erroneous connection of units on the check operation.

Supposed Causes

Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor unitsFailure to execute check operationDefective indoor unit PCBStop valve is not opened

Troubleshooting

Is indoor-outdoor

and outdoor-outdoor unit transmission wiring

normal?

Is indoor - outdoor

and outdoor - outdoor unit transmission wiring

normal?


Wiring check operation may not have been carried out successfully.

After fixing incorrect wiring, press and hold the RESET button on the outdoor unit main PCB for 5 seconds.∗ The unit will not run for up to

12 minutes.YES

NOYES

NO

NO

YESIs the check operation

carried out?


YES

NOAre the stop valves opened?




3.60 System Abnormality, Refrigerant System Address Undefined

Error Code UHApplicable Models



Detect an indoor unit with no auto address setting.


The error decision is made as soon as the abnormality aforementioned is detected.

Supposed Causes

Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor unitsDefective indoor unit PCBDefective outdoor unit PCB (A1P)



Troubleshooting

Is electricity

being introduce for the first time after installation or after an indoor or outdoor unit

PCB has been replaced?

Does an error

occur even after 12 minutes elapses from the time when

electricity is introduced to indoor and

outdoor units?

Is indoor -

outdoor and outdoor - outdoor unit transmission

wiring normal?

Does a "UH" error occur

for all indoor units in the system?

Disconnect the outdoor-outdoor

unit transmission wiring to create the one-system status, and then check

whether or not the system is normal.

NO

YES

YES

After fixing incorrect wiring, press and hold the RESET button on the master outdoor unit PCB for 5 seconds.

Normal

NO

YES

NO

NormalNO

Does an error occur?

Mount the DIII-NET extension adaptor.

YES

NO

YES NO

YES



Press and hold the RESET button on the outdoor unit PCB for 5 seconds

∗ The unit will not run for up to 12 minutes.




3.61 Check

Check for Causes of Rise in High PressureReferring to the Fault Tree Analysis (FTA) shown below, probe the defective points.

Note: ∗1. In cooling, it is normal if the outdoor unit electronic expansion valve (main) is fully open.∗2. In heating, the indoor unit electronic expansion valve is used for “subcooled degree control”.

CHECK 1

Short circuit

Rise in high pressure

Local pressure rise

High pipe resistance

Stop valve closed

Bent or crashed pipe

Clogging of foreign materials

[In cooling] If the outdoor unit electronic expansion valve is throttled: (∗1)

Defective outdoor unit electronic expansion valve

Defective indoor unit electronic expansion valve

Defective valve coil

Defective valve body

Defective control

Defective high pressure sensor

Defective service monitor PCBDefective

high pressure control



[In heating] If the indoor unit electronic expansion valve excessively throttled: (∗2)

Defective control

Defective high pressure sensor

Defective indoor unit liquid pipe thermistor

Defective service monitor PCB

[In cooling]

High suction air temperature of the condenser

[In heating]

High suction air temperature of outdoor unit

Short circuit

High outdoor air temperature

High suction air temperature of indoor unit High room

temperature

Defective suction air thermistor of indoor unit

High suction air temperature of outdoor unit

Defective outdoor air thermistor of outdoor unit

Degradation in condensing capacity

Dirty condenser

Mixing of non-condensable gas

Decreased airflow rate

Decreased fan output

Defective fan motor

Defective service monitor PCB (Including capacity setting)

High airflow passage resistance

Dirty filter

Obstacle

Excessive refrigerant charging

Improper model selection [In heating]

←Check to be sure the stop valve is open.

←Conduct visual checks for pipe conditions.

←Is there any temperature difference caused before and after the filter or branch pipe.

←Are the coil resistance and insulation normal?

←Are the electrical characteristics normal?

←Is the pressure value checked with the Service Checker corresponding to the measurement value of the pressure sensor?



←In the connector properly connected?Are the thermistor resistance characteristics normal?


←Is the suction air temperature less than 43°C (109.4°F)?

←Is the outdoor air temperature less than 43°C (109.4°F)?

←Is the suction air temperature less than 27°C (80.6°F)?

←Is the room temperature less than 27°C (80.6°F)?

←Is the connector properly connected?Are the thermistor resistance characteristics normal?

←Is the outdoor air temperature less than 16°CWB (60.8°FWB)?


←Is the heat exchanger clogged? (In cooling)

←Is air or else mixed in the refrigerant system?

←Can the fan motor be rotated with hands?Are the motor coil resistance and insulation normal?

←If a spare PCB is mounted, is the capacity setting properly made?

←Is the air filter clogged?

←Is there any obstacle in the airflow passage?

←Refer to the error code "F6".

←Is the indoor unit too small compared to the large-sized outdoor unit?

A temperature difference in excess of 10°C (18°F) between the inlet and the outlet is deemed to be abnormal.



Check for Causes of Dropping Low PressureReferring to the Fault Tree Analysis (FTA) shown below, probe the defective points.

Note: ∗1. For details of compressor capacity control while in cooling.∗2. The “low pressure protection control” includes low pressure protection control and hot gas

bypass control.∗3. In cooling, the indoor unit electronic expansion valve is used for “superheated degree control”.

CHECK 2

Abnormally drooping low pressure

(Low evaporating temperature)

[In cooling] (∗1)

Defective low pressure control

Defective compressor capacity control

Defective low pressure sensor


Defective low pressure protection control

Defective low pressure sensor

Defective hot gas solenoid valveDefective service monitor PCB

[In both cooling and heating] (∗2)[In cooling] If the indoor unit electronic expansion valve is throttled too much: (∗3)




Defective control

Defective gas pipe thermistor of indoor unit

Defective liquid pipe thermistor of indoor unit


[In cooling]

Low suction air temperature of the evaporator

Low suction air temperature of indoor unit

Short circuit

Low room temperature

Defective suction air thermistor of indoor unit


Abnormal piping length


Clogging of foreign materials

Stop valve closedLess circulation quantity of refrigerant

Degradation in condensing capacity

Inadequate refrigerant quantity

Moisture choke

Dirty evaporator

Decreased airflow rate

Decreased fan output

Defective fan motor ←Can the fan motor be rotated with hands?Are the motor coil resistance and insulation normal?

←If a spare PCB is mounted, is the capacity setting properly made?

←Is the air filter clogged?

←Is there any obstacle in the airflow passage?

Defective service monitor PCB (Including capacity setting)

High airflow passage resistance

Dirty filter

Obstacle

Defective electronic expansion valve control







←Check for the thermistor resistance and connection.

←Check for the thermistor resistance and connection.


←Is the suction air temperature more than 14˚C (57.2˚F)?

←Is the room temperature less than 14˚C (57.2˚F)?


←Does the piping length fall in the permissible range?

←Conduct visual checks for pipe conditions.

←Is there any temperature difference caused before and after the filter or branch pipe?

←Refer to the error code "U1".

←Eliminate moisture by vacuum operation.

←Is the heat exchanger clogged?



Check the Factors of Overheat Operation (∗4)Identify the defective points referring to the failure factor analysis (FTA) as follows.

Note: ∗1. Refer to “Low pressure protection control” for hot gas bypass control.∗2. Refer to “Subcooling electronic expansion valve control”. ∗3. “Superheating temperature control” in cooling is conducted by indoor unit electronic expansion valve.∗4. Superheating temperature control in heating is conducted by outdoor unit electronic expansion

valve (main). ∗5. Judgement criteria of superheat operation:

(1) Suction gas superheated degree: 10°C (18°F) and over. (2) Discharge gas superheated degree: 45°C (81°F) and over, except immediately after compressor starts up or is running under drooping control.(Use the above values as a guide. Depending on the other conditions, the unit may be normal despite the values within the above range.)

CHECK 3

Abnormal piping length


(Including moisture choke)

Stop valve closed.






←Are the electric characteristics normal?





←Are the electric characteristics normal?

←Refer to CHECK 7

←Does the piping length fall in the permissible range?

←Conduct visual checks.

←Eliminate moisture by vacuum operation. (Refer to CHECK 8 )

←Check if the stop valve is open.

Defective discharge pipe temperature control

Defective hot gas bypass control

Hot gas circuit clogging

Defective solenoid valve coilDefective solenoid valve bodyDefective service monitor PCB



Defective low pressure sensorDefective subcooling heat exchanger outlet thermistor


Defective subcooling electronic expansion valve control

Superheat due to shaft damage

Superheat due to defective compressor


Defective control

Defective control

Defective outdoor unit electronic expansion valve

Defective four way valve operation

[In cooling only]

(∗1)

(∗2)

Compressor overheat

Refrigerant shortage


Defective superheated degree control.

[In cooling]If the indoor unit electronic expansion valve is throttled too much: (∗3)

[In heading]If the outdoor unit electronic expansion valve excessively throttled: (∗4)

Temperature increase of discharge pipe

Defective subcooling electronic expansion valve




←Check if the piping temperature connected to the four way valve is normal.

Four way valve is in the middle position.Leak from hot gas bypass valve

Defective control

Defective gas pipe thermistor of indoor unit

Defective thermistor for indoor unit liquid pipe


Defective low pressure sensorDefective suction pipe thermistorDefective service monitor PCB ←Is the pressure value checked with the Service

Checker corresponding to the measurement value of the pressure sensor?

←Is the connector properly connected? Are the thermistor resistance characteristics normal?



Power Transistor CheckPerform the following procedures prior to check.(1) Power OFF.(2) Remove all the wiring connected to the PCB where power transistors are mounted on.

[Preparation]

[Point of Measurement and Judgement Criteria]Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance.

[PCB and Circuit Diagram]

CHECK 4

Multiple tester ∗ Prepare the analog type of multiple tester.For the digital type of multiple tester, those with diode check function are available for the checking.

When using the analog type of multiple tester, make measurement in resistance measurement mode in the x1kΩ range.

When using the digital type of multiple tester, make measurement in diode check mode ( )

No.Measuring

point Judgement Criteria Remarks No.

Measuring point Judgement

Criteria Remarks+ – + –

1 P2 U

2 ~ 15kΩ

1 P2 U1.2V and

more

Due to condenser charge and so ON, resistance measurement may require some time.

2 P2 V 2 P2 V

3 P2 W 3 P2 W

4 U P2

15kΩ and more (including )


4 U P2

0.3 ~ 0.7V

5 V P2 5 V P2

6 W P2 6 W P2

7 N3 U 7 N3 U

8 N3 V 8 N3 V

9 N3 W 9 N3 W

10 U N3

2 ~ 15kΩ

10 U N31.2V and

more


11 V N3 11 V N3

12 W N3 12 W N3

P3U V WN3

J1

J2

J3

P1

P1 P2IGBT

X11A

U V W

L1

L2

L3

X10A

DM

K2

P3

N3

J1

J2

J3

Since the appearance of PCB shown in this outline drawing is different from the actual appearance, use it as a reference drawing.



Check for Shortage of Refrigerant.In case of VRV Systems, the only way to judge as the shortage of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control.As information for making a judgement, refer to the information below.

Diagnosis of shortage of refrigerant1. The superheated degree of suction gas rises. Consequently, the compressor discharge gas

temperature becomes higher.2. The superheated degree of suction gas rises. Consequently, the electronic expansion valve

turns open.3. Low pressure drops to cause the unit not to demonstrate cooling capacity (heating capacity).

CHECK 7

Cooling

High pressure

Low pressure

Frequency

The opening degree of the indoor unit electronic expansion valve becomes larger. Either of the electronic expansion

valves becomes fully open.

Frequency comes to the minimum level.

Fan control is activated for high pressure protection under cooling control at low outdoor air temperature, i.e., the fan is hunting at high pressure.

High pressure drops with decrease in compressor capacity.

If frequency comes to the minimum level, low pressure cannot be maintained.

Low pressure rises as the opening degree of the indoor unit electronic expansion valve becomes larger. Frequency slightly increases under the capacity control.

To maintain low pressure, frequency drops due to the capacity control.

Heating

High pressure

Low pressure

Frequency

The opening degree of the outdoor unit electronic expansion valve becomes larger.

The outdoor unit electronic expansion valve fully opens and frequency increases.

Discharge pipe or low pressure drooping control

(High pressure is maintained at a constant level.)

To maintain low pressure, frequency drops due to the capacity control.

Frequency drops due to the drooping control.

(Degree of refrigerant shortage)

Higher degree of shortageProper amount

(Low pressure is maintained at a constant level.)

Frequency comes to the minimum level.



Vacuuming and Dehydration ProcedureConduct vacuuming and dehydration in the piping system following the procedure for <Normal vacuuming and dehydration> described below.Furthermore, if moisture may get mixed in the piping system, follow the procedure for <Special vacuuming and dehydration> described below.

<Normal vacuuming and dehydration>(1) Vacuuming and dehydration

• Use a vacuum pump that enables vacuuming down to –100.7 kPa (–404.3 inH2O).• Connect manifold gauges to the service ports of liquid pipe and gas pipe and run the vacuum

pump for a period of 2 or more hours to conduct evacuation to –100.7 kPa (–404.3 inH2O) or less.

• If the degree of vacuum does not reach –100.7 kPa (–404.3 inH2O) or less even though evacuation is conducted for a period of 2 hours, moisture will have entered the system or refrigerant leakage will have been caused. In this case, conduct evacuation for a period of another 1 hour.

• If the degree of vacuum does not reach –100.7 kPa (–404.3 inH2O) or less even though evacuation is conducted for a period of 3 hours, conduct the leak tests.

(2) Leaving in vacuum state• Leave the compressor at the degree of vacuum of –100.7 kPa (–404.3 inH2O) or less for a

period of 1 hour or more, and then check to be sure that the vacuum gauge reading does not rise. (If the reading rises, moisture may have remained in the system or refrigerant leakage may have been caused.)

(3) Additional refrigerant charge• Purge air from the manifold gauge connection hoses, and then charge a necessary amount of

refrigerant.<Special vacuuming and dehydration> - In case of moisture may get mixed in the piping∗(1) Vacuuming and dehydration

• Follow the same procedure as that for 1) Normal vacuuming and dehydration described above.

(2) Vacuum break• Pressurize with nitrogen gas up to 0.05 MPa (200.7 inH2O).

(3) Vacuuming and dehydration• Conduct vacuuming and dehydration for a period of 1 hour or more. If the degree of vacuum

does not reach –100.7 kPa (–404.3 inH2O) or less even though evacuation is conducted for a period of 2 hours or more, repeat vacuum break - vacuuming and dehydration.

(4) Leaving in vacuum state• Leave the compressor at the degree of vacuum of –100.7 kPa (–404.3 inH2O) or less for a

period of 1 hour or more, and then check to be sure that the vacuum gauge reading does not rise.

(5) Additional refrigerant charge• Purge air from the manifold gauge connection hoses, and then charge a necessary amount of

refrigerant.

∗ In case of construction during rainy reason, if dew condensation occurs in the piping due to extended construction period, or rainwater or else may enter the piping during construction work:

CHECK 8



How to Check the Electronic Expansion Valve CoilRemove the connector for electronic expansion valve (X7A) from PCB. Measure the resistance value between pins and check the continuity to judge the condition.

The normal products will show the following conditions:1 No continuity between (1) and (2)2 Resistance value between (1) and (3) is approx. 300 Ω3 Resistance value between (1) and (5) is approx. 150 Ω4 Resistance value between (2) and (4) is approx. 300 Ω5 Resistance value between (2) and (6) is approx. 150 Ω

CHECK 9

1) White

2) Yellow

3) Orange

4) Blue

6) Brown

5) Red

White (1)

Red (5)

Orange (3)

φ1

φ3

φ2 φ4

M

Yellow(2)

Brown(6)

Blue(4)



Thermistor Resistance / Temperature Characteristics

T°C T°F kΩ T°C T°F kΩ T°C T°F kΩ–30 –22 354.1 –30 –22 361.7719 –30 –22 3257.371–25 –13 259.7 –25 –13 265.4704 –25 –13 2429.222–20 –4 192.6 –20 –4 196.9198 –20 –4 1827.883–15 5 144.2 –15 5 147.5687 –15 5 1387.099–10 14 109.1 –10 14 111.6578 –10 14 1061.098–5 23 83.25 –5 23 85.2610 –5 23 817.93290 32 64.10 0 32 65.6705 0 32 635.08315 41 49.70 5 41 50.9947 5 41 496.5712

10 50 38.85 10 50 39.9149 10 50 391.007015 59 30.61 15 59 31.4796 15 59 309.951120 68 24.29 20 68 25.0060 20 68 247.269625 77 19.41 25 77 20.0000 25 77 198.467430 86 15.61 30 86 16.1008 30 86 160.224435 95 12.64 35 95 13.0426 35 95 130.069740 104 10.30 40 104 10.6281 40 104 106.151745 113 8.439 45 113 8.7097 45 113 87.072550 122 6.954 50 122 7.1764 50 122 71.770355 131 5.761 55 131 5.9407 55 131 59.473560 140 4.797 60 140 4.9439 60 140 49.518065 149 4.014 65 149 4.1352 65 149 41.416870 158 3.375 70 158 3.4757 70 158 34.792375 167 2.851 75 167 2.9349 75 167 29.349980 176 2.418 80 176 2.4894 80 176 24.858685 185 2.060 85 185 2.1205 85 185 21.136090 194 1.762 90 194 1.8138 90 194 18.037795 203 1.513 95 203 1.5575 95 203 15.4487

100 212 1.304 100 212 1.3425 100 212 13.2768105 221 1.128 105 221 1.1614 105 221 11.4395110 230 0.9790 3SA48001 (AD87A001J) 110 230 9.8902115 239 0.8527 115 239 8.5788120 248 0.7450 120 248 7.4650125 257 0.6530 125 257 6.5156130 266 0.5741 130 266 5.7038

3PA61998L (AD92A057) 135 275 5.0073140 284 4.4080145 293 3.8907150 302 3.4429

3SA48006 (AD87A001J)

CHECK 11

Outdoor unitRefer to the table A below.

Outdoor unitFor discharge pipe R2T

R21TR22TR31TR32T

Table A

Thermistor REYQ72TYDNREYQ72TTJU



Outdoor air R1T R1T R1TCompressor surface temperature thermistor R14T — R14T

Comp. Suction R12T R12T R12TSuction air R10T R10T R10TH.E, deicer R11T R11T R11T

H.E. gas R8TR9T

R8TR9T

R8TR9T

Receiver inlet R3T R3T R3TSubcooling H.E. liquid R7T R7T R7T

H.E. liquid R4TR5T

R4TR5T

R4TR5T

Subcooling H.E. gas R6T R6T R6TReceiver gas purge R13T R13T R13T



Pressure SensorCHECK 12

High Pressure (PH)

0

0 0.5 1 1.5 2 2.5 3 3.5 4

(VDC)

–5.1 –0.5–0.5

PH, PL

MPa51.0

45.9

40.8

35.7

30.6

25.5

20.4

15.3

10.2

5.1

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

(kgf/cm2)

–167

1673

1505

1338

1171

1004

836

669

502

335

167

0

(ftH2O)

PH (MPa) = × VH – × 0.5

PL (MPa) = × VL – × 0.5

1 MPa = 334.6 ftH2O

PH : High pressurePL : Low pressureVH : Output Voltage (High Side) (VDC)VL : Output Voltage (Low Side) (VDC)

Low Pressure (PL)

4.153.0

4.153.0

1.73.0

1.73.0

Output Voltage (VH, VL)

Detected Pressure



Make Measurement of Voltage of the High Pressure Sensor

Make Measurement of Voltage of the Low Pressure Sensor

CHECK 13

+5 V

(4)

(3)

(2)

(1)

Red

Black

White

Connector for high pressure sensor (Red)


Micro-computer A/D input

Make measurement of DC voltage between these wires.

CHECK 14

+5 V

(4)

(3)

(2)

(1)

Connector for low pressure sensor

Micro-computer A/D input

Make measurement of DC voltage between these wires.

(Blue)

Red

Black

White

Low pressure sensor



Broken Wire Check of the Relay Wires1. Procedure for checking outdoor-outdoor unit transmission wiring for broken wires

On the system shown below, turn OFF the power supply to all equipment, short circuit between the outdoor-outdoor unit terminal F1 and F2 in the "Outdoor Unit A" that is farthest from the central remote controller, and then conduct continuity checks between the transmission wiring terminal blocks F1 and F2 of the central remote controller using a multiple meter. If there is continuity between the said terminal blocks, the outdoor-outdoor unit transmission wiring has no broken wires in it.If there is no continuity, the transmission wiring may have broken wires. With the outdoor-outdoor unit terminal of the "Outdoor Unit A" short circuited, conduct continuity checks between the transmission wiring terminal blocks F1 and F2 of the unified ON/OFF controller. If there is no continuity as well, conduct continuity checks between the outdoor-outdoor unit terminal of the "Outdoor Unit E", between the outdoor-outdoor unit terminal of the "Outdoor Unit D", between the outdoor-outdoor unit terminal of the "Outdoor Unit C", … in the order described, thus identifying the place with continuity.If the place with continuity can be identified, there may be broken wires in places before the said place with continuity.

2. Procedure for checking indoor-outdoor unit transmission wiring for broken wires (for checking the indoor-outdoor unit transmission wiring of the "Outdoor Unit C" for broken wires)Turn OFF the power supply to all equipment, short circuit between the indoor-outdoor unit terminal F1 and F2 in the "Outdoor Unit C, and then conduct continuity checks between the transmission wirings F1 and F2 of the "Indoor Unit a" that is farthest from the "Outdoor Unit C" using a multiple meter. If there is continuity between the said transmission wirings, the indoor-outdoor unit transmission wiring has no broken wires in it.If there is no continuity, the transmission wiring may have broken wires. With the indoor-outdoor unit terminal of the "Outdoor Unit C" short circuited, identify the place with continuity in the transmission wiring of the "Indoor Unit b", transmission wiring of the "Indoor Unit c", and transmission wiring of the "Indoor Unit d" in the order described.If the place with continuity can be identified, there may be broken wires in places before the said place with continuity.

CHECK 15

Short circuit between the outdoor-outdoor unit terminal parts.

Outdoor-outdoor Unit Transmission Wiring

Check the transmission wiring for continuity.If there is continuity, the indoor-outdoor unit transmission has no broken wires in it.

Indoor-outdoor Unit Transmission Wiring

Short circuit between the indoor-outdoor unit terminal parts.

Check the transmission wiring for continuity.If there is continuity, the outdoor-outdoor unit transmission has no broken wires in it.

Unified ON/OFF controller Central remote controller



Check on Connector of Fan Motor (Power Supply Cable)(1) Turn OFF the power supply.

Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.

(1) Turn OFF the power supply.(2) Measure the resistance between Vcc and each phase of U, V, W, and GND and each phase at

the motor side connectors (5-core wire) to check that the values are balanced within the range of ± 20 %, while connector or relay connector is disconnected.Furthermore, to use a multiple meter for measurement, connect the probe of negative pole to Vcc and that of positive pole to GND.

CHECK 16

Measure the resistance values between phases U, V, W.

Red

White

Black W

V

U

CHECK 17

Measure the resistance values between Vcc and U, V, W, and GND and U, V, W.

GND

Vcc

W

V

U

5 Gray

4 Pink

3 Orange

2 Blue

1 Yellow


SiUS341504E

260 Appendix

Part 7Appendix

1. Wiring Diagrams......................................................................................2611.1 Outdoor Units ........................................................................................... 2611.2 Indoor Units .............................................................................................. 267

SiUS341504E Wiring Diagrams

1. Wiring Diagrams1.1 Outdoor UnitsREYQ72TYDN

ONOFF

ONOFF

R1T

M

M

Y2E

Y1E

S1NPL

S1NPH

5

5

t˚

5

M

t˚

Y3E

Q2

R7T

X31A

X18A

X21A

X22A

X32A

PS

X23A

Q1

OUTDOOR

t˚

5

R6T

M

K13R

4

Y4E

BS3

3

SEG3

Y6S

F2

X17A

DS2

2

X37A

X25A

t˚

1

R5T

X30A

K12R

F1

OUTDOOR

BS2

SEG2

Y5S

X16A

t˚

4

R4T

3

DS1

2

F2

HAP

1

K11R

BS1

SEG1

t˚

Y3S

R3T

X15A

INDOOR

F1

t˚

K9R

R14T

Y4S

X13A

S1S

X19A

GRY

GRYX14A

C

t˚

R2T

B

X1A

E1HC

K7R

t˚

S2S

A

R10T

X11A

C/H SELECTOR

X66A

HEAT

COOL

t˚

GRY

GRYX13A

X1M

A9P

R9T

X29A

K3R

F1U

Y1S

F2U

X7A

t˚

Q1LD

K6R

R8T

X2A

X3A

X42A

X4A

X28A

X36A

L1R

A3P

L2R

X1A

X101A

A1P

X10A

X20A

A2P

A4P

A10PX10A

P>

BLURED

RED

S1PH

T1RA11P

BLU

X1A

X9AA12P

A9PX3A

RE

DX2A

CONTROL BOX

CONTROL BOX (2)

A1P

5

A8P

T1R

M

X1M

X8A

X7A

YLW

F1U

T2

RED

BLK

BLK

3

X10A

Y6E

t˚R15T

S

WHT

RED

BLK

PS

X1AX2A

5

2

M

R

t˚RE

D

Z5C N=2

R12T

X8A

WHT

X2AWHT

Y5E

X15A

X5A

X4A

t˚

A12P

BLU

BLU

X9A

5

R11T

HAP

RE

D

X2A

t˚

5

R13T

X3A

X17A

X2A

V1R

N1

R24

BLK

A8P

Z2F

L3AW

HT

X10A

L2A

M1F

F101U

P1

RED

L1A

+

BLU

X11A

X1A

X1A

X1A

X3A

WHT

WHT

WHT

WHT

WHT

WHT

WHT

WHT

WHT

WHT

WHT

X3A

A4P

X3A

RE

D

X1A

R1

:

L32

K1R

BLU

REDBLK

A11P

L31

RE

D

P5N5P4N4

BLU

W

V

X4A

X2A

A10P

X6A

X601A

X602A

X63A

RE

DF6

01U

PS

BLU

K3R

L12

U

RE

D

X41A

L11

V2R

BLK

RED

WHT

R313

X1M

BLK

BLK

-

-

-

L1

L3

L2

W

W

L3B

L3A

L3B

C48

R854

+

F403U

WH

TW

HT

V

V

Z1F

V1R

L2B

L2A

L2B

C47

U

R851

+

RE

D+

+R

ED

M1C

OUTER SHELL

U

M1C

L1B

L1A

L1B

WH

T

K1M

CONTROL BOX (2)

F401U

CONTROL BOX

P11

P21

L2R

A2P

A3P

GRN

WH

T

M1F

L1R

LAYOUT OF M1C, M1F

WH

T3~ 460V 60Hz

L1

L3

L2

POWER SUPPLY

T1A N=1

TO X101A (A1P)

(Q1) (Q2)(F1) (F2)

(NOTE 4) (NOTE 4) (NOTE 4)

(F1) (F2)

(REAR SIDE)(FRONT SIDE)

(NOTE 3)

(NOTE 3)

E

Z1C N=1

OUTPUT 230V

FROM T1A

Z2C N=1Z3C N=1

Z4C N=2

MS 3~

MS 3~

TERMINAL OF M1C

IS CONNECTOR COLOR FOR COMPONENT.

HEAT

COOL

FAN

·

COOL/HEAT SELECTOR (OPTIONAL ACCESSORY) (NOTE 3)

X1M (NOTE 8)TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT

(NOTE 8)

Z6C N=2

A1PA2PA3PA4PA8PA9PA10PA11PA12PBS1~BS3

C47, C48DS1, DS2E1HCF1U, F2UF1UF101UF401U, F403UF601UHAP

K1MK1RK3RK3RK6RK7RK9RK11RK12RK13R

L1R, L2RM1CM1FPSQ1LDR1R24R313R851, 854R1TR2TR3TR4TR5TR6TR7TR8TR9TR10TR11TR12TR13TR14TR15TS1NPHS1NPLS1PHSEG1~SEG3T1AT1RV1R

V1RV2RX1A, X2AX3AX7A~X11AX13A, X14AX1MX1MX1MY1EY2EY3EY4EY5EY6EY1SY3SY4SY5SY6SZ1C~Z6CZ1FZ2F

X10AX37A

S1SS2S

POWER MODULE (A4P)POWER MODULE (A3P)CONNECTOR (M1F)CONNECTOR (CHECK THE RESIDUAL CHARGE)CONNECTOR (CONTROL BOX (2))CONNECTOR (E1HC)TERMINAL STRIP (POWER SUPPLY)TERMINAL STRIP (CONTROL) (A1P)TERMINAL STRIP (ABC I/P) (A9P)ELECTRONIC EXPANSION VALVE (HEAT EXC. UPPER)ELECTRONIC EXPANSION VALVE (SUBCOOLING HEAT EXC.)ELECTRONIC EXPANSION VALVE (HEAT EXC. LOWER)ELECTRONIC EXPANSION VALVE (RECEIVER GAS PURGE)ELECTRONIC EXPANSION VALVE (REFRIGERANT COOLING)ELECTRONIC EXPANSION VALVE (LEAK DETECTION)SOLENOID VALVE (OS OIL RETURN)SOLENOID VALVE (LIQUID SHUTOFF)FOUR WAY VALVE (HP/LP GAS)FOUR WAY VALVE (HEAT EXC. LOWER)FOUR WAY VALVE (HEAT EXC. UPPER)NOISE FILTER (FERRITE CORE)NOISE FILTER (A2P) (WITH SURGE ABSORBER)NOISE FILTER (A11P)

CONNECTOR FOR OPTIONAL ACCESSORIESCONNECTOR (DRAIN PAN HEATER) (A1P)CONNECTOR (POWER ADAPTOR) (A1P)

COOL/HEAT SELECTORSELECTOR SWITCH (FAN/COOL·HEAT)SELECTOR SWITCH (COOL/HEAT)

REACTORMOTOR (COMPRESSOR)MOTOR (FAN)SWITCHING POWER SUPPLY (A1P, A3P, A8P)LEAKAGE DETECTION CIRCUIT (A1P)RESISTOR (CURRENT LIMITING) (A10P)RESISTOR (CURRENT SENSOR) (A4P)RESISTOR (CURRENT SENSOR) (A3P)RESISTOR (A3P)THERMISTOR (AIR)THERMISTOR (M1C DISCHARGE)THERMISTOR (RECEIVER INLET)THERMISTOR (HEAT EXC. LIQUID UPPER)THERMISTOR (HEAT EXC. LIQUID LOWER)THERMISTOR (SUBCOOLING GAS)THERMISTOR (SUBCOOLING LIQUID)THERMISTOR (HEAT EXC. GAS UPPER)THERMISTOR (HEAT EXC. GAS LOWER)THERMISTOR (SUCTION)THERMISTOR (DEICER)THERMISTOR (COMP. SUCTION)THERMISTOR (RECEIVER GAS PURGE)THERMISTOR (M1C BODY)THERMISTOR (LEAK DETECTION)PRESSURE SENSOR (HIGH)PRESSURE SENSOR (LOW)PRESSURE SWITCH (HIGH)7-SEGMENT DISPLAY (A1P)CURRENT SENSORTRANSFORMER (460V/230V)POWER MODULE (A3P)

PRINTED CIRCUIT BOARD (MAIN)PRINTED CIRCUIT BOARD (NOISE FILTER)PRINTED CIRCUIT BOARD (INV.)PRINTED CIRCUIT BOARD (FAN)PRINTED CIRCUIT BOARD (SUB)PRINTED CIRCUIT BOARD (ABC I/P)PRINTED CIRCUIT BOARD (CURRENT LIMITING)PRINTED CIRCUIT BOARD (NOISE FILTER)PRINTED CIRCUIT BOARD (OPEN PHASE PROTECTION)BS BUTTON (A1P) (MODE, SET, RETURN)CAPACITOR (A3P)DIP SWITCH (A1P)CRANKCASE HEATERFUSE (A1P)FUSE (A8P)FUSE (A4P)FUSE (A2P)FUSE (A3P)PILOT LAMP (A1P, A8P) (SERVICE MONITOR-GREEN)MAGNETIC CONTACTOR (M1C) (A3P)MAGNETIC RELAY (A10P)MAGNETIC RELAY (A3P)MAGNETIC RELAY (Y1S) (A1P)MAGNETIC RELAY (OPTION) (A1P)MAGNETIC RELAY (E1HC) (A1P)MAGNETIC RELAY (Y4S) (A1P)MAGNETIC RELAY (Y3S) (A1P)MAGNETIC RELAY (Y5S) (A1P)MAGNETIC MAGNETIC (Y6S) (A1P)

1. THIS WIRING DIAGRAM APPLIES ONLY TO THE OUTDOOR UNIT.2. : FIELD WIRING, : TERMINAL BLOCK, : CONNECTOR,

: TERMINAL, : PROTECTIVE EARTH (SCREW), : NOISELESS EARTH.3. WHEN USING THE OPTIONAL ADAPTOR, REFER TO THE INSTALLATION

MANUAL OF THE OPTIONAL ADAPTOR.4. FOR CONNECTION WIRING TO INDOOR-OUTDOOR TRANSMISSION F1·F2,

OUTDOOR-OUTDOOR TRANSMISSION F1·F2, OUTDOOR-MULTI TRANSMISSION Q1·Q2, REFER TO THE INSTALLATION MANUAL.

5. HOW TO USE BS1~3 SWITCH, REFER TO "SERVICE PRECAUTION" LABEL ON CONTROL BOX COVER.

6. WHEN OPERATING, DO NOT SHORT-CIRCUIT THE PROTECTION DEVICE (S1PH).7. COLORS BLK: BLACK; RED: RED; BLU: BLUE; WHT: WHITE; GRN: GREEN; GRY: GRAY; YLW: YELLOW8. CLASS 2 WIRE

NOTES)

C: 3D089800D

Appendix 261

Wiring Diagrams SiUS341504E

REYQ96 / 120TYDN

1. TH

IS W

IRIN

G DI

AGRA

M A

PPLI

ES O

NLY

TO T

HE O

UTDO

OR U

NIT.

2.: F

IELD

WIR

ING,

: TE

RMIN

AL B

LOCK

,

: CON

NECT

OR,

:TER

MIN

AL,

: PRO

TECT

IVE

EART

H (S

CREW

),

: N

OISE

LESS

EAR

TH.

3. W

HEN

USIN

G TH

E OP

TION

AL A

DAPT

OR, R

EFER

TO T

HE IN

STAL

LATI

ON M

ANUA

L

OF T

HE O

PTIO

NAL

ADAP

TOR.

4. FO

R CO

NNEC

TION

WIR

ING

TO IN

DOOR

-OUT

DOOR

TRA

NSM

ISSI

ON F

1•F2

,

OUTD

OOR-

OUTD

OOR

TRAN

SMIS

SION

F1•

F2, O

UTDO

OR-M

ULTI

TRAN

SMIS

SION

Q1•

Q2, R

EFER

TO T

HE IN

STAL

LATI

ON M

ANUA

L.

5. HO

W TO

USE

BS1

~3 S

WIT

CH, R

EFER

TO "S

ERVI

CE P

RECA

UTIO

N" L

ABEL

ON

CONT

ROL

BOX

COVE

R.

6. W

HEN

OPER

ATIN

G, D

O NO

T SH

ORT-C

IRCU

IT T

HE P

ROTE

CTIO

N DE

VICE

(S1P

H, S

2PH)

.

7. CO

LORS

BLK

: BLA

CK; R

ED: R

ED; B

LU: B

LUE;

WHT

: WHI

TE; G

RN: G

REEN

; GRY

: GRA

Y; Y

LW: Y

ELLO

W.

8. CL

ASS

2 WIR

E

WHT

WHT

A1P

X7A

X8A

X1A

RED

X1M

WHT

F1U

WHT

X25A

RED

Y4E

BLU

PS

L1L1

5 5 5 5

M M M M

WHT

RED

F2U

T1R

L2L2

K7R

K4R

K3R

K8R

BLKBLK

RED

RED

RED

BLK

WHT

RED

BLK

WHT

BLK

K6R

X10A

A2P

A5P

X23A

Y3E

L3L3

SEG2

SEG3

SEG1

X11A

X8A

X7A

X12A

(NO

TE

3)

L2A

L1A

L3A

L2A

L1A

L3A

L2B

L1B

L3B

L2B

L1B

L3B

X10

1A

K11R

K9R

K13R

K12R

F401

UF4

03UF4

01U

F403U

BS3

BS1

BS2

Y2S

Y1S

X22A

Q1L

DY2

EX1

7AX1

5AX1

3AX1

6AGR

NGR

NE

ED

S1

DS

2Z1

FZ1

FGR

YYLW

YLWGR

YR1

3TR1

5TR1

1TR1

2TX

4AX1

4AX1

5AX1

6AX1

3A12

3412

34Y1

EP> P>

BLURED

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚

X21A

A8P

Y6S

Y3S

Y4S

Y5S

S2P

HE

2HC

YLWGR

YYLW

GRY

E1H

CX1

AX

3AX

37A

R9T

R10T

R8T

R6T

R5T

R3T

R4T

R7T

R22T

R21T

X15

AX

17A

X18A

R1T

S1P

HF1

UH

AP

(NOT

E 3)

X2A

PS

S1NP

LH

AP

X31A

X29

AX

30A

X19

AX

8AX

10A

X3A

X1M

(N

OT

E 8

)X2

0AX

2A

BLK

RED

BLK

REDWHT

WHT

A6P

A3P

X32A

A9P

S1NP

HA

7PX

63A

X1M

(N

OT

E 8

)5

5F

1Q

2Q

1F

2F

2F

1L2

BL1

BL3

BL2

BL1

BL3

BX3

ARE

DRE

DX1

AF6

01U

F601

UM

M+

K3R

K3R

C/H

SELE

CTOR

X1A

WHT

WHT

X3A

P11

HE

ATY6

EY

5EX6

1AX6

6AX6

AA

X41A

P1

F101

UX4

1AK

84R

K84

RCO

OL

X62A

-X1

2AS

2SZ8

C N=

9N

11K2

MK2

MX4

AK1

MK1

MM

2F(N

OTE

4)(N

OTE

4)(N

OTE

4)X2

8AN

1R2

4V1

RX5

A5

R1

R1

X41A

X40A

S1S

++

++

5-

-V1

RV1

RX2

AX5

AP

1P

1P

SP

S X4A

(NO

TE

3)

X4A

RED

X4A

C66

C32

RED

WHT

C32

C66

X6A

++

A4P

P2

NOTE

S)

P2

X63

AX3

AR1

2R1

2R1

1R1

1

+

X1A

CONT

ROL

BOX

(2)

WHT

WHT X

1AC

ON

TR

OL

BO

XW

RED

P11

F101

UR

77R

77

-

T1R

X6A

X5A

UA1

PA8

P+

+-

-A5

PA2

PM

1FX7

AB

LKN1

1V

R24

V1R

V1R

V1R

L2R

5X1

MA9

PX8

AP

3N3

P3

N3W

A3P

VA6

PU

WV

U5

L1R

X3A

X1A

X2A

RED

BLK

RED

BLK

X5A

X4A

X2A

X5A

BLK

RED

WHT

BLK

RED

WHT

X4A

M2F

M1F

CONT

ROL

BOX

X2A

WHT

WHT

WHT

WHT

WHT

WHT

VWH

TX

6AW

UV

WU

CONT

ROL

BOX

(2)

M2C

L2R

L1R

M1C

M1C

M2C

WHT

OUT

ER S

HELL

A8P

A9P

BS1~

BS3

C32

, C66

DS1

, DS2

E1HC

, E2H

CF

1UF

2UF

101U

F401

U, F4

03U

F60

1UH

AP

K1M

, K2M

K3R

K3R

K4R

K6R

K7R

K8R

K9R

K11

RK

12R

K13

RK

84R

L1R

, L2R

M1C

, M2C

M1F

, M2F

PS

Q1L

DR

1R

11, R

12R

24R

77R

1TR

21T

R22

TR

3TR

4TR

5TR

6TR

7TR

8TR

9T

PRIN

TED

CIR

CU

IT B

OAR

D (S

UB)

PRIN

TED

CIRC

UIT

BOAR

D (A

BC I/

P)B

S B

UT

TON

(A

1P)

(MO

DE

, SE

T, R

ET

UR

N)

CA

PAC

ITO

R (

A3P

, A6P

)D

IP S

WIT

CH

(A

1P)

CR

AN

KC

AS

E H

EAT

ER

FU

SE

(A

1P, A

8P)

FU

SE

(A

1P)

FU

SE

(A

4P, A

7P)

FU

SE

(A

2P, A

5P)

FU

SE

(A

3P, A

6P)

PIL

OT

LA

MP

(A

1P, A

8P)

(SE

RV

ICE

MO

NIT

OR

-GR

EE

N)

MAG

NETI

C CO

NTAC

TOR

(A3P

, A6P

)M

AG

NE

TIC

RE

LAY

(A

3P, A

6P)

MA

GN

ETI

C R

ELA

Y (Y

1S) (

A1P

)M

AG

NE

TIC

RE

LAY

(Y2S

) (A

1P)

MAG

NET

IC R

ELAY

(OPT

ION

) (A1

P)M

AGN

ETI

C R

ELA

Y (E

1HC

) (A

1P)

MAG

NE

TIC

RE

LAY

(E2H

C) (

A1P

)M

AG

NE

TIC

RE

LAY

(Y4S

) (A

1P)

MA

GN

ETI

C R

ELA

Y (Y

3S) (

A1P

)M

AG

NE

TIC

RE

LAY

(Y5S

) (A

1P)

MA

GN

ETI

C R

ELA

Y (Y

6S) (

A1P

)M

AG

NE

TIC

RE

LAY

(A3P

) (A

6P)

RE

AC

TOR

MO

TOR

(C

OM

PR

ES

SO

R)

MO

TOR

(FA

N)

SWITC

HING

POW

ER S

UPPL

Y (A

1P, A

3P, A

6P, A

8P)

LEAK

AGE

DETE

CTIO

N CI

RCUI

T (A

1P)

RESI

STOR

(CUR

RENT

LIMI

TING

) (A3

P, A6

P)R

ES

ISTO

R (

A3P

, A6P

)RE

SIST

OR (C

URRE

NT S

ENSO

R) (A

4P, A

7P)

RESI

STOR

(CUR

RENT

SEN

SOR)

(A3P

, A6P

)T

HE

RM

ISTO

R (

AIR

)TH

ERM

ISTO

R (M

1C D

ISC

HAR

GE)

THER

MIS

TOR

(M2C

DIS

CH

ARG

E)TH

ERM

ISTO

R (R

ECEI

VER

INLE

T)TH

ERMI

STOR

(HEA

T EX

C. LI

QUID

UPP

ER)

THER

MIST

OR (H

EAT

EXC.

LIQU

ID LO

WER

)TH

ERM

ISTO

R (S

UBCO

OLI

NG G

AS)

THER

MIS

TOR

(SUB

COO

LING

LIQ

UID)

THER

MIS

TOR

(HEA

T EX

C. G

AS U

PPER

)TH

ERM

ISTO

R (H

EAT

EXC.

GAS

LOW

ER)

R10

TR

11T

R12

TR

13T

R15

TS

1NP

HS

1NP

LS1

PH, S

2PH

SEG1

~SEG

3T

1AT

1RV

1RV

1RX1

A~X4

AX5

A, X

6A

X7A,

X8A

X12

AX1

3A~X

16A

X1M

X1M

X1M

Y1E

Y2E

Y3E

Y4E

Y5E

Y6E

Y1S

Y2S

Y3S

Y4S

Y5S

Y6S

Z1C~

Z8C

Z1F

X10

AX

37A

S1S

S2S

TH

ER

MIS

TOR

(S

UC

TIO

N)

TH

ER

MIS

TOR

(D

EIC

ER

)TH

ER

MIS

TOR

(CO

MP

SU

CTI

ON

)TH

ERM

ISTO

R (R

ECEI

VER

GAS

PURG

E)TH

ERM

ISTO

R (L

EAK

DET

ECTI

ON

)P

RE

SS

UR

E S

EN

SO

R (

HIG

H)

PR

ES

SU

RE

SE

NS

OR

(LO

W)

PR

ES

SU

RE

SW

ITC

H (

HIG

H)

7-S

EG

ME

NT

DIS

PLA

Y (

A1P

)C

UR

RE

NT

SE

NS

OR

TR

AN

SF

OR

ME

R (

460V

/230

V)

PO

WE

R M

OD

ULE

(A

3P, A

6P)

PO

WE

R M

OD

ULE

(A

4P, A

7P)

CO

NN

EC

TOR

(M

1F, M

2F)

CO

NN

ECTO

R

(CH

ECK

THE

RES

IDUA

L C

HAR

GE)

CO

NN

EC

TOR

(T

1R)

CO

NN

EC

TOR

CO

NN

EC

TOR

(E

1HC

, E2H

C)

TERM

INAL

STR

IP (P

OW

ER S

UPPL

Y)TE

RMIN

AL S

TRIP

(CO

NTRO

L) (A

1P)

TER

MIN

AL

STR

IP (A

BC

I/P

) (A

9P)

ELEC

TRON

IC EX

PANS

ION V

ALVE

(HEA

T EXC

. UPP

ER)

ELEC

TRO

NIC

EXP

ANSI

ON

VAL

VE

(SU

BCO

OLI

NG

HEA

T EX

C.)

ELEC

TRON

IC EX

PANS

ION V

ALVE

(HEA

T EXC

. LOW

ER)

ELEC

TRON

IC EX

PANS

ION VA

LVE (

RECE

IVER G

AS PU

RGE)

ELEC

TRON

IC EX

PANS

ION VA

LVE (

REFR

IGERA

NT CO

OLING

)EL

ECTR

ONIC

EXPA

NSIO

N VAL

VE (L

EAK D

ETEC

TION)

SOLE

NOID

VAL

VE (O

S O

IL R

ETUR

N 1)

SOLE

NOID

VAL

VE (O

S O

IL R

ETUR

N 2)

SOLE

NOID

VAL

VE (L

IQUI

D SH

UTO

FF)

FOU

R W

AY V

ALV

E (H

P/L

P G

AS

)FO

UR W

AY V

ALVE

(HEA

T EX

C. L

OWER

)FO

UR W

AY V

ALVE

(HEA

T EX

C. U

PPER

)N

OIS

E F

ILTE

R (F

ER

RIT

E C

OR

E)

NO

ISE

FIL

TE

R (

A2P

, A5P

) (W

ITH

SU

RG

E A

BS

OR

BE

R)

CONN

ECTO

R FO

R O

PTIO

NAL

ACCE

SSO

RIES

CONN

ECTO

R (D

RAIN

PAN

HEAT

ER) (

A1P)

CONN

ECTO

R (P

OWER

ADA

PTOR

) (A1

P)

CO

OL/

HE

AT S

ELE

CTO

RSE

LECT

OR S

WIT

CH (F

AN/C

OOL•

HEAT

)SE

LEC

TOR

SW

ITC

H (C

OO

L/H

EAT)

PO

WE

R S

UP

PLY

3~

460

V 6

0Hz

T1A

N=1

Z7C

N

=1

Z7C

N

=1

A1P

A2P

, A5P

A3P

, A6P

A4P

, A7P

PRIN

TED

CIR

CU

IT B

OAR

D (M

AIN

)PR

INTE

D CI

RCUI

T BO

ARD

(NOI

SE F

ILTER

)P

RIN

TED

CIR

CU

IT B

OA

RD

(IN

V.)

PR

INTE

D C

IRC

UIT

BO

AR

D (F

AN

)

:

IS

CONN

ECTO

R CO

LOR

FOR

COM

PONE

NT.

:

IS M

ARKI

NG

CO

LOR

O

N C

ON

NEC

TOR

.

MS

3 ~ MS

3 ~

Z4C

N

=2

Z3C

N

=2

Z5C

N=1

Z6C

N=1

Z6C

N

=1IN

DO

OR

(F

1) (

F2)

OU

TDO

OR

(F

1) (

F2)

OU

TDO

OR

(Q

1) (

Q2)

CO

OL

• H

EAT

FA

N

CO

OL/

HEA

T SE

LEC

TOR

(O

PTIO

NAL

AC

CES

SORY

)

BC

TERM

INAL

OF

M1C

, M2C

LAY

OU

T O

F

M1C

, M2C

, M1F

, M2F

MS

3~M

S 3 ~

Z1C

N=5

Z2C

N=5

Z5C

N=1

Z6C

N=1

OUT

PUT

230V

ON

OFF

ON

O

FF

TO IN

/D U

NITT

O OUT

/D UN

ITTO

MULTI

UNIT

A7P

A4P

2D08

9801

B

262 Appendix


REYQ144 / 168TYDN

A1P

RED

X1A

X7A

WHT

X25A

F1U

RED

RED

RED

Y4E

X9A

BLU

PS

BLK

BLK

RED

RED

L1

WHT

WHT

A2P

5L1

MW

HTWH

TL1

AL3

AL2

AL1

AL3

AL2

ARE

DF

2UT1

R

K3R

K7R

K8R

K4R

L2L2

BLK

X23A

RED

BLU

X7A

X11A

X12A

X8A

Y3E

A10P

X10A

K6R

L3

RED

BLU

L3BL

KBL

KSE

G3SE

G2SE

G1F4

03U

5F4

01U

K9R

K13R

K11R

L32

L31

K12R

MX8

AR

1K1

RG

RN

EE

X17A

X16A

X15A

X13A

Z1F

X101

AY2

SY1

SX2

2AA11

P

RED

BS3

REDBLU

BS2

BS1

BLKWHT

Y2E

FROM

X1A

5Q

1LD

X1A

X2A

RED

BLK

DS

1D

S2

WHT

ML3

AL2

AL1

AL2

BL1

BL3

BL1

BL2

BL3

BT1

AGR

YGR

YYLW

YLWA1

2PY6

SY3

SY5

SY4

SX1

5AX1

4AX

13A

X16A

ST2

X4A

R12

3412

34Y1

EX2

1AGR

YGR

YYLW

YLW5

32

E2H

CE

1HC

MS2

PHX

37A

BLU

R6T

R7T

R14T

R4T

R10T

R5T

R22T

R8T

R9T

R3T

R21T

X3A

R1T

X18A

YLW

HA

PS1

PHS1

NPL

R11T

R13T

R12T

R15T

X1M

X31A

X2A

WHT

RED

REDBLU

BLU

RED

RED

BLK

BLK

X30

AX

29A

X19

A

REDBLU

WHT

WHT

A3P

A6P

A8P

X10

AL3

BL2

BL1

BL3

BL2

BL1

BX3

2AA

9PA

7PQ

2F

2F

1F

1F

2Q

1X1

AX

15A

X17A

S1NP

HWH

TL1

2L1

1X4

1ARE

DRE

DF1

UX1

M ( N

OTE

8)

+

K3R

WHT

X1A

PSX

66A

P11

HA

PH

EAT

P1X3

AX

8AX

10A

X61A

K84R

X20A

X2A

CO

OL

-CO

OLN1

1K3

R5

5S

2SX6

AK2

MK1

MK1

MH

EAT

M2F

MM

N1X6

2AY

5EY6

EFA

N5

X36A

X5A

X41A

X4A

5

+

+

-V1

R-V1

RS1

SX4

AX4

1AX5

AX

2APS

P11

P1

X6A

X12

AWH

TC3

2C6

6C4

8C4

7+

++

+A

4PX2

8APS

P21

P2

X3A

CONT

ROL

BOX

( 2)

+

R12

R11

R851

R854

X1A

X40A

X63A

L3R

RED

A1P

P11

A8P

X6A

X5A

F101

UA1

1PR

313

R77

-

A5P

A2P

T1R

X1M

A9P

A7P

L2R

+

+

--

A3P

A6P

M1F

X3A

X1A

A4P

BLK

A12P

A10P

N11

V2R

R24

V1R

V1R

L1R

5X

9AX1

0AX2

AX4

AP3

N3P4

N4W

WV

VU

U5

X2A

RED

BLK

RED

BLK

X5A

WHT

WHTWHT

X4A

BLK

RED

WHT

X2A

BLK

RED

WHT

X6A

WHTWHT

X5A

VW

UCO

NTRO

L BO

XM

2FM

1FL3

RL2

RM

2CL1

RCO

NTRO

L BOX

( 2)

WHT

WHT

M1C

M2C O

UTER

SHE

LL

WU

V

PO

WE

R S

UP

PLY

3~

460

V 6

0Hz

X1M

T1A

N=1

TO X

101A

( A

1P)

GR

NA5P

Z7C

N

=1

F401

UF4

03U

Z1F

Z7C

N=1

WHT X

3A

MS 3~

X1A

X3A F1

01U

R24

V1R

Z4C

N=2

X4A

RED

WHT X

4A

X1A

WHT

WHT

MS 3~

Z3C

N=2

WHT

WHT

:

IS C

ONNE

CTOR

COL

OR F

OR

COM

PONE

NT.

:

IS D

ISCR

IMIN

ATIO

N CO

LOR

FOR

COM

PONE

NT L

EAD

WIR

E.

Z5C

N=1

Z6C

N=1

Z6C

N=1

X602

AX2

AX6

3A

F601U

MS 3~

Z1C

N=5

Z2C

N=5

M1C

VW

UM

S 3~

R1

F601

U

X11A

X3A

Z1F

OUT

PUT

230V

t˚t˚

t˚t˚

Z6C

N=1

Z5C

N=1

Z8C

N=9P>P>

(NO

TE

3)

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚( N

OTE

3)( N

OTE

8)TO

IN/D

UNI

TTO

OUT

/D UN

ITTO

MUL

TI UN

IT

( NOT

E 4)

( NOT

E 4)

( NOT

E 4)

COOL

/HEA

T SE

LECT

OR( O

PTIO

NAL

ACCE

SSOR

Y)( N

OT

E 3

)

•

INDO

OR

( F1)

( F2)

OUT

DOO

R ( F

1) ( F

2)O

UTDO

OR

(Q1)

(Q2)

C/H

SELE

CTO

RA

BC

CO

NT

RO

L B

OX

TERM

INAL

OF

M1,

M2C

LAYO

UT O

F M

1C, M

2C, M

1F, M

2F

A1P

A2P

, A5P

A3P

, A6P

A4P

, A7P

A8P

A9P

A10

PA

11P

A12

PB

S1~

BS

3

C32

, C66

C47

, C48

DS

1, D

S2

PRIN

TED

CIR

CU

IT B

OAR

D ( M

AIN

)PR

INTE

D CI

RCUI

T BOA

RD ( N

OISE

FILT

ER)

PRIN

TED

CIR

CU

IT B

OAR

D ( I

NV.

)PR

INTE

D C

IRC

UIT

BO

ARD

( FAN

)PR

INTE

D C

IRC

UIT

BO

ARD

( SU

B)PR

INTE

D CI

RCUI

T BO

ARD

( ABC

I/P)

PRINT

ED CI

RCUIT

BOAR

D (CU

RREN

T LIM

ITING

)PR

INTE

D CI

RCUI

T BOA

RD ( N

OISE

FILT

ER)

PRINT

ED CI

RCUIT

BOAR

D (OP

EN PH

ASE P

ROTE

CTION

)B

S B

UT

TON

(A

1P)

( MO

DE

, SE

T, R

ET

UR

N)

CA

PAC

ITO

R (

A3P

)C

APA

CIT

OR

(A

6P)

DIP

SW

ITC

H (

A1P

)

E1HC

, E2H

CF

1UF

2UF

101U

F401

U, F4

03U

F60

1UH

AP

K1M

, K2M

K1R

K3R

K3R

K4R

K6R

K7R

K8R

K9R

K11

RK

12R

K13

RK

84R

L1R

~L3

RM

1C, M

2CM

1F, M

2FP

SQ

1LD

R1

R11

, R12

R24

R77

R31

3R8

51, R

854

R1T

R21

TR

22T

R3T

R4T

R5T

R6T

R7T

R8T

R9T

R10

TR

11T

R12

T

t˚

CR

AN

KC

AS

E H

EAT

ER

FU

SE

(A

1P, A

8P)

FU

SE

(A

1P)

FU

SE

(A

4P, A

7P)

FU

SE

(A

2P, A

5P)

FU

SE

(A

3P, A

6P)

PIL

OT

LA

MP

(A

1P, A

8P)

( SE

RV

ICE

MO

NIT

OR

-GR

EE

N)

MAG

NETI

C CO

NTAC

TOR

( A3P

, A6P

)M

AG

NE

TIC

RE

LAY

(A

10P

)M

AG

NE

TIC

RE

LAY

( A3P

, A6P

)M

AGN

ETI

C R

ELA

Y ( Y

1S) (

A1P

)M

AGN

ETI

C R

ELA

Y ( Y

2S) (

A1P

)M

AGNE

TIC

RELA

Y ( O

PTIO

N) ( A

1P)

MAG

NET

IC R

ELAY

( E1H

C) (

A1P)

MAG

NET

IC R

ELAY

( E2H

C) (

A1P)

MAG

NE

TIC

RE

LAY

( Y4S

) (A

1P)

MAG

NE

TIC

RE

LAY

( Y3S

) (A

1P)

MAG

NE

TIC

RE

LAY

( Y5S

) (A

1P)

MAG

NE

TIC

RE

LAY

( Y6S

) (A

1P)

MA

GN

ET

IC R

ELA

Y (

A3P

)R

EA

CTO

RM

OTO

R (

CO

MP

RE

SS

OR

)M

OTO

R (

FAN

)SW

ITCHIN

G PO

WER S

UPPL

Y (A1

P, A3P,

A6P, A

8P)

LEAK

AGE

DETE

CTIO

N CI

RCUI

T ( A

1P)

RESIS

TOR

( CUR

RENT

LIMI

TING)

( A3P

, A10

P)R

ES

ISTO

R (

A3P

)RE

SIST

OR ( C

URRE

NT S

ENSO

R) ( A

4P, A

7P)

RESI

STOR

( CUR

RENT

SEN

SOR)

( A3P

)RE

SIST

OR ( C

URRE

NT L

IMIT

ING)

( A6P

)R

ES

ISTO

R (

A6P

)T

HE

RM

ISTO

R (

AIR

)TH

ERM

ISTO

R ( M

1C D

ISC

HAR

GE)

THER

MIS

TOR

( M2C

DIS

CH

ARG

E)TH

ERM

ISTO

R ( R

ECEI

VER

INLE

T)TH

ERMI

STOR

( HEA

T EXC

. LIQ

UID

UPPE

R)TH

ERMI

STOR

( HEA

T EXC

. LIQ

UID

LOW

ER)

THER

MIS

TOR

( SUB

COO

LING

GAS

)TH

ERM

ISTO

R ( S

UBCO

OLIN

G LI

QUID

)TH

ERMI

STOR

( HEA

T EXC

. GAS

UPP

ER) ( A

1P)

THER

MIST

OR ( H

EAT E

XC. G

AS LO

WER)

( A1P

)T

HE

RM

ISTO

R (

SU

CT

ION

)T

HE

RM

ISTO

R (

DE

ICE

R)

THER

MIS

TOR

( CO

MP.

SU

CTI

ON

)

R13

TR

14T

R15

TS

1NP

HS

1NP

LS1

PH, S

2PH

SEG1

~SEG

3T

1AT

1RV

1RV

1RV

2RX

1A~X

4AX

5A, X

6A

X7A~

X11A

X12

AX1

3A~X

16A

X1M

X1M

X1M

Y1E

Y2E

Y3E

Y4E

Y5E

Y6E

Y1S

Y2S

Y3S

Y4S

Y5S

Y6S

Z1C

~Z8C

Z1F

Z2F

X10

AX

37A

S1S

S2S

THER

MIST

OR ( R

ECEI

VER

GAS

PURG

E)T

HE

RM

ISTO

R (

M2C

BO

DY

)TH

ERM

ISTO

R ( L

EAK

DETE

CTIO

N)P

RE

SS

UR

E S

EN

SO

R (

HIG

H)

PR

ES

SU

RE

SE

NS

OR

(LO

W)

PR

ES

SU

RE

SW

ITC

H (

HIG

H)

7-S

EG

ME

NT

DIS

PLA

Y (

A1P

)C

UR

RE

NT

SE

NS

OR

TR

AN

SF

OR

ME

R (

460V

/230

V)

PO

WE

R M

OD

ULE

(A

3P, A

6P)

PO

WE

R M

OD

ULE

(A

4P, A

7P)

PO

WE

R M

OD

ULE

(A

6P)

CO

NN

EC

TOR

(M

1F, M

2F)

CO

NN

EC

TOR

( CHE

CK T

HE R

ESID

UAL

CHAR

GE)

CO

NN

EC

TOR

(T

1R)

CO

NN

EC

TOR

CO

NN

EC

TOR

(E

1HC

, E2H

C)

TERM

INAL

STR

IP ( P

OWER

SUP

PLY)

TERM

INAL

STR

IP ( C

ONT

ROL)

( A1P

)TE

RM

INAL

STR

IP ( A

BC I/

P) ( A

8P)

ELEC

TRON

IC EX

PANS

ION VA

LVE ( H

EAT E

XC. U

PPER

)EL

ECTR

ON

IC E

XPAN

SIO

N V

ALVE

( SU

BC

OO

LIN

G H

EAT

EX

C. )

ELEC

TRON

IC EX

PANS

ION VA

LVE ( H

EAT E

XC. LO

WER)

ELECT

RONIC

EXPAN

SION V

ALVE (

RECE

IVER G

AS PU

RGE)

ELECT

RONIC

EXPAN

SION V

ALVE ( R

EFRIGE

RANT

COOL

ING)

ELEC

TRON

IC EX

PANS

ION VA

LVE (

LEAK

DETE

CTION

)SO

LENO

ID V

ALVE

( OS

OIL

RETU

RN 1

)SO

LENO

ID V

ALVE

( OS

OIL

RETU

RN 2

)SO

LENO

ID V

ALVE

( LIQ

UID

SHUT

OFF

)FO

UR

WAY

VA

LVE

( HP

/LP

GA

S)

FOUR

WAY

VALV

E ( H

EAT

EXC.

LOW

ER)

FOUR

WAY

VAL

VE ( H

EAT

EXC.

UPP

ER)

NO

ISE

FILT

ER ( F

ERR

ITE

CO

RE)

NO

ISE

FIL

TE

R (

A2P

, A5P

) ( W

ITH

SU

RG

E A

BS

OR

BE

R)

NO

ISE

FIL

TE

R (

A11

P)

CONN

ECTO

R FO

R O

PTIO

NAL

ACCE

SSO

RIES

CONN

ECTO

R ( D

RAIN

PAN

HEAT

ER) (

A1P)

CONN

ECTO

R ( P

OWER

ADA

PTOR

) (A1

P)

CO

OL/

HE

AT S

ELE

CTO

RSE

LECT

OR S

WIT

CH ( F

AN/C

OOL •

HEA

T)SE

LECT

OR

SWIT

CH ( C

OO

L/HE

AT)

1. TH

IS W

IRIN

G DI

AGRA

M A

PPLI

ES O

NLY

TO T

HE O

UTDO

OR U

NIT.

2.

: F

IELD

WIR

ING,

: TE

RMIN

AL B

LOCK

,

: CON

NECT

OR,

:TER

MIN

AL,

: PRO

TECT

IVE

EART

H (S

CREW

),

: N

OISE

LESS

EAR

TH.

3. W

HEN

USIN

G TH

E OP

TION

AL A

DAPT

OR, R

EFER

TO T

HE IN

STAL

LATI

ON M

ANUA

L OF

THE

OPT

IONA

L AD

APTO

R.

4. FO

R CO

NNEC

TION

WIR

ING

TO IN

DOOR

-OUT

DOOR

TRA

NSM

ISSI

ON F

1•F2

, OUT

DOOR

-OUT

DOOR

TRA

NSM

ISSI

ON F

1•F2

,

OUTD

OOR-

MUL

TI T

RANS

MIS

SION

Q1•

Q2, R

EFER

TO T

HE IN

STAL

LATI

ON M

ANUA

L.

5. HO

W TO

USE

BS1

~3 S

WIT

CH, R

EFER

TO "S

ERVI

CE P

RECA

UTIO

N" L

ABEL

ON

CONT

ROL

BOX

COVE

R.

6. W

HEN

OPER

ATIN

G, D

O NO

T SH

ORT-C

IRCU

IT T

HE P

ROTE

CTIO

N DE

VICE

(S1P

H, S

2PH)

.

7. CO

LORS

BLK

: BLA

CK; R

ED: R

ED; B

LU: B

LUE;

WHT

: WHI

TE; G

RN: G

REEN

; GRY

: GRA

Y; Y

LW: Y

ELLO

W.

8. CL

ASS

2 WIR

E

NOTE

S)

ON

OFF

ON

OFF

2D08

9802

C

Appendix 263


REYQ72TTJU

PRINTED CIRCUIT BOARD (MAIN)PRINTED CIRCUIT BOARD (NOISE FILTER)PRINTED CIRCUIT BOARD (INV.)PRINTED CIRCUIT BOARD (FAN)PRINTED CIRCUIT BOARD (SUB)PRINTED CIRCUIT BOARD (ABC I/P)BS BUTTON (A1P) (MODE, SET, RETURN)CAPACITOR (A3P)DIP SWITCH (A1P)CRANKCASE HEATERFUSE (A1P)FUSE (A8P)FUSE (A4P)FUSE (A2P)PILOT LAMP (SERVICE MONITOR-GREEN) (A1P, A8P)MAGNETIC CONTACTOR (M1C) (A3P)MAGNETIC RELAY (Y1S) (A1P)MAGNETIC RELAY (STANDBY) (A3P)MAGNETIC RELAY (OPTION) (A1P)MAGNETIC RELAY (E1HC) (A1P)MAGNETIC RELAY (Y3S) (A1P)MAGNETIC RELAY (Y2S) (A1P)MAGNETIC RELAY (Y4S) (A1P)MAGNETIC RELAY (Y5S) (A1P)MAGNETIC RELAY (CURRENT LIMITING) (A3P)REACTORMOTOR (COMPRESSOR)

M

M

Y1E

Y2E

R1T

5

5

S1NPL

S1NPH

t˚

5

M Y3E

Q2

t˚

X18A

X21A

X31A

X22A

X32A

M1C

OUTER SHELL

R7T

PS

CONTROL BOX

X23A

OUTDOOR

Q1

5

t˚

M

R6T

K13

R

M1F

Y4E

Y6S

X17A

F2

X25A

t˚

R5T

K12

R

X30A

BS3

DS2

SEG3

OUTDOOR

X37A

Y5S

X16A

F1

X1M (NOTE 8)

t˚

R4T

K11

R

BS2

F2

Y3S

SEG2

X15A

V

W

DS1

HAP

t˚

1234 1234

INDOOR

R3T

K9R

F1

ON

BS1

Y4S

TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT

X13A

SEG1

OFFON

OFF

t˚

U

R14T

X14A

GRY

GRY

X19A

E1HC

K7R

S1S

X11A

t˚

R2T

Q1RP

C

GRY

GRY

HEAT

COOL

FAN

X13A

t˚

R10T

B

X1AC/H SELECTOR

S2S

t˚

X66A

A

R9T

K3R

X29A

Y1S

X7A

HEAT

F1U

F2U

COOL

Q1LD

t˚

K6R

X1M

R8T

A9P

X20A

X101A

A1P

X10A

X1A

X2A

X3A

X4A

X28A

BLU

REDWHT

P>

X2A

WHT

WHT

WHT

S1PH

X1A

X2A

RE

D

X4A

X5A

5

X2A

X3A

N11

F1U

5

V3R

R2

N=3Z3C

N=2Z4C

-

N1

PS

t˚

M1F

R15T

P1

5

+

M

X15A

Y6E

WHT

t˚

X1AWHT

WHT

X1A

X10A

R12T

F101U

X3A

A4P

X3A

5M

BLU

BLU

RED

RED

t˚

Y5E

R11T

X8A

P3

N3

P32

N32

X5A

X6A

X4A

t˚

X41A

N=1T1A

HAP

R13T

X17A

PS

BLU

RED

WHT

A8P

BLU

BLU

V2R

A3P

L1R

Z1C N=1Z2C N=1

R112

L1

L3

L2

X1M

K2M

K5R

A2P

A4P

W

-

-

W

WH

TW

HT

L3

C1

BLU

+

M1C

V

V

RED

RED

L2

A9PX3A

WH

T

U

L3B

L3A+

+

F4U

U

L1

Z1F

CONTROL BOX

RE

DB

LK

K1M

V1R

L2B

L2A

K84R

A1P

A8P

X1M

BLK

L1B

L1A

R1

L1R

E1

F5U

P21

P1

A3P

A2P

3~ 208/230V 60HzPOWER SUPPLY

L1

L3

L2

X1A

(FRONT SIDE) (REAR SIDE)

GRN

X2A

(NOTE 4)

(Q1) (Q2)

(NOTE 4)

(F1) (F2)

(NOTE 3)

(NOTE 4)

(F1) (F2)

(NOTE 8)

(NOTE 3)

MS 3~

MS 3~

·

COOL/HEAT SELECTOR (OPTIONAL ACCESSORY) (NOTE 3)

TERMINAL OF M1C

IS CONNECTOR COLOR FOR COMPONENT.

:

LAYOUT OF M1C, M1F

A1PA2PA3PA4PA8PA9PBS1~BS3

C1DS1, DS2E1HCF1U, F2UF1UF101UF4U, F5UHAPK1M, K2MK3RK5RK6RK7RK9RK11RK12RK13RK84RL1RM1C

M1FPSQ1LDQ1RPR1R112R2R1TR2TR3TR4TR5TR6TR7TR8TR9TR10TR11TR12TR13TR14TR15TS1NPHS1NPLS1PHSEG1~SEG3T1AV1R

V2RV3RX1A, X2AX3AX13A, X14AX1MX1MX1MY1EY2EY3EY4EY5EY6EY1SY3SY4SY5SY6SZ1C~4CZ1F

X10AX37A

S1SS2S

MOTOR (FAN)SWITCHING POWER (A1P, A3P, A8P)LEAKAGE DETECTION CIRCUIT (A1P)PHASE REVERSAL DETECTION CIRCUIT (A1P)RESISTOR (CURRENT LIMITING) (A3P)RESISTOR (CURRENT SENSOR) (A3P)RESISTOR (CURRENT SENSOR) (A4P)THERMISTOR (AIR)THERMISTOR (M1C DISCHARGE)THERMISTOR (RECEIVER INLET)THERMISTOR (HEAT EXC. LIQUID UPPER)THERMISTOR (HEAT EXC. LIQUID LOWER)THERMISTOR (SUBCOOLING GAS)THERMISTOR (SUBCOOLING LIQUID)THERMISTOR (HEAT EXC. GAS UPPER)THERMISTOR (HEAT EXC. GAS LOWER)THERMISTOR (SUCTION)THERMISTOR (DEICER)THERMISTOR (COMP. SUCTION)THERMISTOR (RECEIVER GAS PURGE)THERMISTOR (M1C BODY)THERMISTOR (LEAK DETECTION)PRESSURE SENSOR (HIGH)PRESSURE SENSOR (LOW)PRESSURE SWITCH (HIGH)7-SEGMENT DISPLAY (A1P)CURRENT SENSORDIODE MODULE (A3P)

POWER MODULE (A3P)POWER MODULE (A4P)CONNECTOR (M1F)CONNECTOR (CHECK THE RESIDUAL CHARGE)CONNECTOR (E1HC)TERMINAL STRIP (POWER SUPPLY)TERMINAL STRIP (CONTROL) (A1P)TERMINAL STRIP (ABC I/P) (A9P)ELECTRONIC EXPANSION VALVE (HEAT EXC. UPPER)ELECTRONIC EXPANSION VALVE (SUBCOOLING HEAT EXC.)ELECTRONIC EXPANSION VALVE (HEAT EXC. LOWER)ELECTRONIC EXPANSION VALVE (RECEIVER GAS PURGE)ELECTRONIC EXPANSION VALVE (REFRIGERANT COOLING)ELECTRONIC EXPANSION VALVE (LEAK DETECTION)SOLENOID VALVE (OS OIL RETURN)SOLENOID VALVE (LIQUID SHUTOFF)FOUR WAY VALVE (HP/LP GAS)FOUR WAY VALVE (HEAT EXC. LOWER)FOUR WAY VALVE (HEAT EXC. UPPER)NOISE FILTER (FERRITE CORE)NOISE FILTER (WITH SURGE ABSORBER) (A2P)

CONNECTOR FOR OPTIONAL ACCESSORIESCONNECTOR (DRAIN PAN HEATER) (A1P)CONNECTOR (POWER ADAPTOR) (A1P)

COOL/HEAT SELECTORSELECTOR SWITCH (FAN/COOL·HEAT)SELECTOR SWITCH (COOL/HEAT)

1. THIS WIRING DIAGRAM APPLIES ONLY TO THE OUTDOOR UNIT.2. : FIELD WIRING, : TERMINAL BLOCK, : CONNECTOR,

: TERMINAL, : PROTECTIVE EARTH (SCREW), : NOISELESS EARTH.3. WHEN USING THE OPTIONAL ADAPTOR, REFER TO THE INSTALLATION MANUAL

OF THE OPTIONAL ADAPTOR.4. FOR CONNECTION WIRING TO INDOOR-OUTDOOR TRANSMISSION F1·F2, OUTDOOR-OUTDOOR TRANSMISSION F1·F2,

OUTDOOR-MULTI TRANSMISSION Q1·Q2, REFER TO THE INSTALLATION MANUAL.5. HOW TO USE BS1~3 SWITCH, REFER TO "SERVICE PRECAUTION" LABEL ON CONTROL BOX COVER.6. WHEN OPERATING, DO NOT SHORT-CIRCUIT THE PROTECTION DEVICE (S1PH).7. COLORS BLK: BLACK; RED: RED; BLU: BLUE; WHT: WHITE; GRN: GREEN; GRY: GRAY.8. CLASS 2 WIRE

NOTES)

3D088895C

264 Appendix


REYQ96 / 120TTJU

55

Y3E

Y4E

MM

A1P

RED

R15T

R11T

R12T

R13T

F1U

X25

AX

23A

X1M

WHT

PS

RED

t˚t˚

t˚t˚

BL

UWH

TRE

DRE

DWH

TBL

UL1

RED

A8P

A2P

A5P

WHT

L1Y2

EQ1

RPX2

2ABL

U

K8R

K7R

5W

HTF2

UM

L2A

L3A

L1A

L2A

L3A

L1A

L2L2

X12A

X11A

X1A

X1A

X17

AX

15A

K6R

BLU

F1U

F4U

F4U

F5U

F5U

L3L3

(NOT

E 3)

K11R

K12R

K13R

SEG2

SEG1

SEG3

K9R

K4R

K3R

PS

X10

AY1

EX2

1AX1

5AX1

3AX8

AX7

AX1

7AX1

6AYLW

YLWGR

NGR

NH

AP

E1

E1

5Z1

FZ1

FX2

AX3

AM

X8A

X10

AX1

6AX1

5ABS

3BS

2BS

1Q1

LDX1

01A

YLWGR

YGR

YYLW

TO X

101A

(A1P

)L2

BL3

BL1

BL2

BL3

BL1

BE

2HC

DS1

DS2

Y6S

Y3S

Y4S

Y5S

Y2S

Y1S

X13A

X14A

55

X20A

MM

GRY

GRY

S1NP

L4

E1H

CA

7PX3

1AY

6EY

5EX3

AX

37A

R22T

R5T

R7T

R4T

R6T

R3T

R10T

R8T

R21T

R9T

X4A

S1NP

H

+

X1A

RED RE

DRE

D

RED

WHT WH

T

WHT WH

TWH

T

WHT

WHT

X3A

BLU

BLU

RED

WHT

WHT

RED

A6P

A3P

X32A

HA

Pt˚

(NOT

E 3)

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚P1

L1L1

L2L2

L3L3

X61A

F101

US

2PH

X6A

X4A

-

X3A

X30

At˚

X29

AX

19A

R1T

X18

AR

1R

1K1

MK1

MK

2MK

2MX

1M (

NO

TE

8)

M2F

N1X4

AR

2A

9PP>P>

V3R

5S

1PH

TO IN

/D UN

ITTO

OUT/D

UNIT

TO MU

LTI UN

ITK8

4RK8

4RN1

1X1

M ( N

OTE

8)K5

RF

2F

1Q

2F

2F

1Q

1X

2AX1

A5

K5R

X41A

X41A

C/H

SELE

CTOR

V1R

V1R

HE

ATX

2AX

5AX5

A

+

+

PS

--

CB

AX

66A

COOL

P1

P1

X4A

COOL

X4A

PS

X6A

S2S

N32

WHT

BLU

HEAT

C1

C1

X28

AX

6A+

+A

4PP

21P

21FA

NP3

2RED

X3A +

X1A

X1A

S1S

WHT

N31B

LUM

2F M

1FP1

X5A

F101

UBL

UN3

2

-

CONT

ROL B

OXN3

BLU

R11

2R1

12RE

DP3

2M

1FN1

R2

M1C

V3R

P31

5

+

+

RED

--

M2C

CO

NT

RO

L B

OX

N11

V2R

V2R

5OU

TER

SHEL

LP3

RED

X2A

X6A

X5A

X5A

A1P

A8P

WW

VV

UU

A5P

A2P

X2A

X4A

L2R

X1M

A9P

A7P

WHT

BLK

RED

WHT

RED

BLK

A3P

A6P

WHT

WHT

X1A

X3A

A4P

L1R

VBL

KBL

KV

X2A

X4A

WU

WU

L2R

M2C

M1C

WL1

RU

V

PO

WE

R S

UP

PLY

3~

208

/230

V 6

0Hz

T1A

N=

1

MS

3~

MS

3 ~M

S 3~

IS CO

NNEC

TOR C

OLOR

FOR

COMP

ONEN

T.IS

DISCR

IMINA

TION C

OLOR

FO

R COM

PONE

NT LE

AD W

IRE.

: :

Z2C

N

=4

Z3C

N

=2

Z1C

N

=4 TE

RMIN

AL O

F M

1C, M

2CFROM

T1

A

COOL

/HEAT

SELE

CTOR

(OPT

IONAL

ACCE

SSOR

Y) (NO

TE 3)

(NOT

E 4)

(NOT

E 4)

(NOT

E 4)

INDOO

R (F1

) (F2)

OUTD

OOR

(F1) (F

2)OU

TDOO

R (Q1

) (Q2)

LAYO

UT

OF

M1C

, M2C

, M

1F, M

2F

123

412

3

ON

OFF

ON

OFF

NO

TE

S)

1. TH

IS W

IRIN

G DI

AGRA

M AP

PLIE

S ON

LY TO

THE

OUTD

OOR

UNIT.

2.

:

FIEL

D W

IRIN

G,

: TE

RMIN

AL B

LOCK

,

: C

ONNE

CTOR

, : T

ERMI

NAL,

: PRO

TECT

IVE EA

RTH

(SCR

EW),

:

NOISE

LESS

EART

H.3.

WHEN

USIN

G TH

E OPT

IONA

L ADA

PTOR

, REF

ER TO

THE I

NSTA

LLAT

ION

MANU

AL

OF TH

E OPT

IONA

L ADA

PTOR

.4.

FOR

CONN

ECTIO

N WIR

ING

TO IN

DOOR

-OUT

DOOR

TRAN

SMISS

ION

F1•F2

, OU

TDOO

R-OU

TDOO

R TRA

NSMI

SSIO

N F1

•F2, O

UTDO

OR-M

ULTI

TRAN

SMISS

ION

Q1•Q

2, RE

FER T

O TH

E INS

TALL

ATIO

N MA

NUAL

.5.

HOW

TO U

SE BS

1~3 S

WITC

H, R

EFER

TO "S

ERVIC

E PRE

CAUT

ION"

LABE

L ON

CONT

ROL B

OX C

OVER

.6.

WHEN

OPE

RATIN

G, D

O NO

T SHO

RT-C

IRCU

IT TH

E PRO

TECT

ION

DEVIC

E (S1

PH, S

2PH)

.7.

COLO

RS BL

K: BL

ACK;

RED:

RED;

BLU:

BLUE

; WHT

: WHI

TE; G

RN: G

REEN

; GRY

: GRA

Y; YL

W: YE

LLOW

.8.

CLAS

S 2 W

IRE

A1P

A2P

, A5P

A3P

, A6P

A4P

, A7P

PRIN

TED

CIRC

UIT

BOAR

D (M

AIN)

PRINT

ED CI

RCUIT

BOAR

D (NO

ISE FI

LTER

)PR

INTE

D CI

RCUI

T BO

ARD

(INV.

)PR

INTE

D CI

RCUI

T BO

ARD

(FAN

)

A8P

A9P

BS1~

BS3

C1

DS1

, DS2

E1HC

, E2H

CF1

U, F

2UF

1UF

101U

F4U

, F5U

HA

P

K1M

K1M

, K2M

K3R

K4R

K5R

K6R

K7R,

K8R

K9R

K11

RK

12R

K13

RK

84R

L1R

, L2R

M1C

, M2C

M1F

, M2F

PS

Q1L

DQ

1RP

R1

R11

2R

113

R2

R1T

R21

TR

22T

R3T

R4T

R5T

R6T

R7T

PRIN

TED

CIRC

UIT

BOAR

D (S

UB)

PRIN

TED

CIRC

UIT

BOAR

D (A

BC I/P

)B

S B

UT

TON

(A

1P)

(MO

DE

, SE

T, R

ET

UR

N)

CA

PAC

ITO

R (

A3P

, A6P

)D

IP S

WIT

CH

(A

1P)

CR

AN

KC

AS

E H

EAT

ER

FU

SE

(A

1P)

FU

SE

(A

8P)

FU

SE

(A

4P, A

7P)

FU

SE

(A

2P, A

5P)

PIL

OT

LA

MP

(A

1P)

(SER

VIC

E M

ON

ITO

R-G

REE

N)

MAGN

ETIC

CON

TACT

OR (M

1C) (

A3P)

MAGN

ETIC

CON

TACT

OR (M

2C) (

A6P)

MAG

NETI

C RE

LAY

(Y1S

) (A1

P)M

AGNE

TIC

RELA

Y (Y

2S) (

A1P)

MAGN

ETIC

REL

AY (S

TAND

BY) (A

3P, A

6P)

MAG

NETI

C RE

LAY

(OPT

ION)

(A1P

)MA

GNET

IC R

ELAY

(E1H

C, E

2HC)

(A1P

)M

AGNE

TIC

RELA

Y (Y

4S) (

A1P)

MAG

NETI

C RE

LAY

(Y3S

) (A1

P)M

AGNE

TIC

RELA

Y (Y

5S) (

A1P)

MAG

NETI

C RE

LAY

(Y6S

) (A1

P)M

AG

NE

TIC

RE

LAY

(C

URRE

NT L

IMIT

ING

) (A3

P, 46

P)R

EA

CTO

RM

OTO

R (

CO

MP

RE

SS

OR

)M

OTO

R (

FAN

)SW

ITCHIN

G POW

ER SU

PPLY

(A1P, A

3P, A6

P, A8P

)LE

AKAG

E DE

TECT

ION

CIRC

UIT

(A1P

)PH

ASE R

EVER

SAL D

ETEC

T CIRC

UIT (A

1P)

RESIS

TOR (

CURR

ENT L

IMITI

NG) (A

3P, A

6P)

RESIS

TOR (

CURR

ENT S

ENSO

R) (A

3P, A6

P)RE

SISTO

R (C

URRE

NT SE

NSOR

) (A3P

)RE

SISTO

R (CU

RREN

T LIM

ITING

) (A4P,

A7P)

TH

ER

MIS

TOR

(A

IR)

THER

MIS

TOR

(M1C

DIS

CHAR

GE)

THER

MIS

TOR

(M2C

DIS

CHAR

GE)

THER

MIS

TOR

(REC

EIVE

R IN

LET)

THER

MIST

OR (H

EAT E

XC. L

IQUID

UPPE

R)TH

ERMI

STOR

(HEA

T EXC

. LIQ

UID LO

WER)

THER

MIS

TOR

(SUB

COOL

ING

GAS)

THER

MIST

OR (S

UBCO

OLIN

G LIQ

UID)

R8T

R9T

R10

TR

11T

R12

TR

13T

R15

TS

1NP

HS

1NP

LS1

PH, S

2PH

SEG1

~SEG

3T

1AV

1RV

2RV

3RX1

A~X4

AX5

A, X

6A

X13A

~X16

AX

1MX

1MX

1MY

1EY

2EY

3EY

4EY

5EY

6EY

1SY

2SY

3SY

4SY

5SY

6SZ1

C~Z

5CZ

1F

X10

AX

37A

S1S

S2S

THER

MIST

OR (H

EAT E

XC. G

AS U

PPER

)TH

ERMI

STOR

(HEA

T EXC

. GAS

LOWE

R)T

HE

RM

ISTO

R (

SU

CT

ION

)T

HE

RM

ISTO

R (

DE

ICE

R)

THER

MIS

TOR

(CO

MP.

SUCT

ION)

THER

MIST

OR (R

ECEIV

ER G

AS PU

RGE)

THER

MIS

TOR

(LEA

K DE

TECT

ION)

PRES

SUR

E SE

NSO

R (H

IGH

)PR

ESSU

RE

SEN

SOR

(LO

W)

PRES

SUR

E SW

ITC

H (H

IGH

)7-

SEG

MEN

T D

ISPL

AY (A

1P)

CU

RR

EN

T S

EN

SO

RD

IOD

E M

OD

ULE

(A3P

, A6P

)PO

WER

MO

DU

LE (A

3P, A

6P)

POW

ER M

OD

ULE

(A4P

, A7P

)C

ON

NE

CTO

R (

M1F

, M2F

)C

ON

NE

CTO

R

(CHE

CK TH

E RE

SIDU

AL C

HARG

E)C

ON

NE

CTO

R (E

1HC

, E2H

C)

TERM

INAL

STR

IP (P

OWER

SUP

PLY)

TERM

INAL

STR

IP (C

ONTR

OL) (

A1P)

TERM

INAL

STR

IP (A

BC I/

P) (A

9P)

ELECT

RONIC

EXPAN

SION V

ALVE (H

EAT EX

C. UPP

ER)

ELECTR

ONIC E

XPANSI

ON VA

LVE (SU

BCOOLI

NG HE

AT EXC.

)ELE

CTRO

NIC EX

PANSIO

N VALV

E (HEAT

EXC. L

OWER

)ELE

CTRON

IC EXPA

NSION

VALVE

(RECEI

VER GA

S PUR

GE)

ELECTR

ONIC E

XPANSI

ON VA

LVE (RE

FRIGE

RANT C

OOLIN

G)ELE

CTRO

NIC EX

PANSIO

N VALV

E (LEA

K DETE

CTION

)SO

LENO

ID VA

LVE

(OS

OIL R

ETUR

N 1)

SOLE

NOID

VALV

E (O

S OI

L RET

URN

2)SO

LENO

ID VA

LVE

(LIQU

ID S

HUTO

FF)

FOUR

WAY

VAL

VE (H

P/LP

GAS

)FO

UR W

AY VA

LVE

(HEA

T EXC

. LOW

ER)

FOUR

WAY

VALV

E (H

EAT E

XC. U

PPER

)NO

ISE

FILT

ER (F

ERRI

TE C

ORE

)N

OIS

E F

ILT

ER

(A

2P, A

5P)

(WIT

H S

UR

GE

AB

SO

RB

ER

)CO

NNEC

TOR

FOR

OPTI

ONAL

ACC

ESSO

RIES

CONN

ECTO

R (DR

AIN PA

N HEA

TER)

(A1P

)CO

NNEC

TOR

(POW

ER AD

APTO

R) (A

1P)

CO

OL/

HE

AT S

ELE

CTO

RSE

LECT

OR SW

ITCH

(FAN/

COOL

•HEA

T)SE

LECT

OR S

WIT

CH (C

OOL/

HEAT

)

MS

3~

2D08

8751

C

Appendix 265


REYQ144 / 168TTJU

55

Y3E

Y4E

MM

A1P

RED

R15T

R11T

R12T

R13T

F1U

X23

AX

25A

X1M

WHT

t˚t˚

t˚t˚

PS

RED

BLU

WHT

BLU

RE

DW

HT

RED

RED

WHT

A2P

A8P

A5P

L1L1

Y2E

X22

ABL

UQ1

RP

K7R

K8R

5WH

TL1

AL2

AL3

AL3

AL2

AL1

AF2

UM

L2L2

X1A

X15

AX

17A

X11A

X12A

X1A

K6R

BLU

F1U

F4U

F4U

F5U

F5U

L3L3

K11R

K12R

K13R

SEG1

K3R

K9R

K4R

SEG2

SEG3

PS

X10

AY

1EX

21A

GRN

GR

NH

AP

E1

E1

YLWYLW

X7A

X13A

X8A

X15A

X16A

X17A

Z1F

Z1F

5X

10A

X8A

X3A

X2A

X15A

MX1

6AQ1

LDBS

1BS

2BS

3X1

01A

YLWYLW

E2H

CL1

BL2

BL3

BL1

BL3

BL2

BTO

X10

1A (A

1P)

DS

2D

S1

Y1S

Y5S

Y4S

Y2S

Y3S

Y6S

55

X20

AGR

YGR

YM

MX

14A

X13

AS1

NPL

1234

1234

Y5E

Y6E

A7P

X4A

X31A

GRY

GRY

E1H

CX3

AX

37A

R4T

R7T

R6T

R5T

R3T

R21

TR

9TR

10T

R8T

R22

TR

14T

S1NP

HBL

UBL

URE

DRE

DWH

TWH

TA

6PA

3PRE

DX1

ARE

DWH

TWH

TX3

AS2

PHX3

2AH

AP

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚t˚

t˚L1

L1L2

L3L2

L3X

3AX6

1AX

6AP1

F101

UX

4A X5A

t˚R

1TX

18A

R1

X30

AR

1X

19A

X29

AK1

MK1

MK

2MK

2MX

1MX

4AS1

PHM

2FN1

A9P

R2

K84R

K84R

V3R

X2A

5N

11X1

MX6

AK5

RF1

Q2

Q1

F2F2

F1K5

RX4

1AX4

1AX1

AV1

RV1

R5

C/H

SELE

CTOR

X28

AX

2AHE

ATX

5AP

SP

1P

1B

AC

WHT

PS

RED

RED

WHT

X4A

X6A

X5A

WHT

COOL

N32

X4A

BLU

N32B

LUC

1C

1X

66A

S2S

P21

P21

LAYO

UT O

FA

4PP

32RE

DP3

2RE

DX3

AX1

AWH

TX

1AN3

1S1

SBL

UM

1FCO

OL/HE

AT SE

LECT

OR (O

PTIO

NAL A

CCES

SORY

)OU

TDOO

RIND

OOR

OUTD

OOR

P1CO

NTRO

L BOX

F101

UN3

BLU

R11

2R1

12N

OT

ES

)M

1FP3

1N1

R2

RED

V3R

5N

11OU

TER SH

ELLV

2RV2

RP3

RED

5X

2AW

WV

VX

5AU

UX2

AWH

TWH

TX

4AX5

AX6

ARE

DBL

URE

DBL

KWH

TWH

TA

1PA8

PBL

KBL

KWH

T WHT

A5P

A2P

VV

WW

UU

L2R

X1M

A9P

A7P

L1R

L2R

M1C

M2C

A3P

A6P

X1A

X3A

A4P

L1R

WX4

AX2

AU

V

(NO

TE 3

)

(NO

TE

8)

(NOT

E 8)

(NOTE

4)(NO

TE 4)

(NOTE

4)

(NO

TE

3)

(F1)

(F2)

(Q1)

(Q2)

(F1)

(F2)

(NO

TE 3

)

A1P

CO

NT

RO

L B

OX

M1C

M2C

M2F

COO

L·

HEAT

FAN

P> P>

FRO

M

T1A

ON

OFF

ON

OFF

M1C,

M2C

, M1

F, M2

F

TO IN

/D UN

ITTO

OUT/D

UNIT

TO MU

LTI UNI

T

T1A

N=1

Z3C

N

=2

Z2C

N

=3

Z1C

N

=4

: :

MS

3~ MS

3~

MS

3~MS

3~

IS C

ONNE

CTOR

COL

OR FO

R CO

MPON

ENT.

IS D

ISCR

IMIN

ATIO

N CO

LOR

FOR

COMP

ONEN

T LEA

D W

IRE.

1. TH

IS WI

RING

DIAG

RAM

APPL

IES O

NLY T

O TH

E OUT

DOOR

UNI

T.2.

: FIEL

D WIR

ING,

: T

ERMI

NAL B

LOCK

,

: C

ONNE

CTOR

, : T

ERMI

NAL,

:

PROT

ECTIV

E EAR

TH (S

CREW

),

: NOI

SELE

SS EA

RTH.

3. WH

EN U

SING

THE O

PTIO

NAL A

DAPT

OR, R

EFER

TO TH

E INS

TALL

ATIO

N MA

NUAL

OF

THE O

PTIO

NAL A

DAPT

OR.

4. FO

R CO

NNEC

TION W

IRIN

G TO

INDO

OR-O

UTDO

OR TR

ANSM

ISSIO

N F1

·F2,

OUTD

OOR-

OUTD

OOR T

RANS

MISS

ION

F1·F2

, OUT

DOOR

-MUL

TI TR

ANSM

ISSIO

N Q1

·Q2,

REFE

R TO

THE I

NSTA

LLAT

ION

MANU

AL.

5. HO

W TO

USE

BS1~

3 SWI

TCH,

REF

ER TO

"SER

VICE P

RECA

UTIO

N" LA

BEL O

N CO

NTRO

L BOX

COV

ER.

6. WH

EN O

PERA

TING,

DO

NOT S

HORT

-CIR

CUIT

THE P

ROTE

CTIO

N DE

VICE (

S1PH

, S2P

H).

7. CO

LORS

BLK:

BLAC

K; RE

D: RE

D; BL

U: BL

UE; W

HT: W

HITE

; GRN

: GRE

EN; G

RY: G

RAY;

YLW:

YELL

OW.

8. CL

ASS 2

WIR

E

A2P

, A5P

A3P

, A6P

A4P

, A7P

A8P

A9P

BS

1~3

C1

DS1

, DS2

E1HC

, E2H

CF1

U, F

2UF

1UF

101U

F4U

, F5U

HA

PK

1MK1

M, K

2MK

3RK

4RK

5RK

6RK

7R, K

8RK

9RK

11R

K12

RK

13R

K84

RL1

R, L

2RM

1C, M

2CM

1F, M

2FP

SQ

1LD

Q1R

PR

1R

112

R11

3R

2R

1TR

21T

R22

TR

3TR

4TR

5TR

6T

PRIN

TED

CIRC

UIT B

OARD

(NOI

SE FI

LTER

)PR

INTE

D CI

RCUI

T BO

ARD

(INV.

)PR

INTE

D CI

RCUI

T BO

ARD

(FAN

)PR

INTE

D CI

RCUI

T BO

ARD

(SUB

)PR

INTE

D CI

RCUI

T BO

ARD

(ABC

I/P)

BS

BU

TTO

N (A

1P)

(RE

TUR

N, M

OD

E, S

ET)

CA

PAC

ITO

R (

A3P

, A6P

)D

IP S

WIT

CH

(A

1P)

CR

AN

KC

AS

EF

US

E (

A1P

)F

US

E (

A8P

)F

US

E (

A4P

, A7P

)F

US

E (

A2P

, A5P

)PIL

OT LA

MP (S

ERVIC

E MON

ITOR-G

REEN

) (A1P,

A8P)

MAG

NET

IC R

ELAY

(M1C

) (A3

P)M

AGN

ETIC

REL

AY (M

2C) (

A6P)

MAG

NET

IC R

ELAY

(Y1S

) (A1

P)M

AGN

ETIC

REL

AY (Y

2S) (

A1P)

MAGN

ETIC

REL

AY (S

TAND

BY) (

A3P,

A6P)

MAG

NETI

C RE

LAY

(OPT

ION)

(A1P

)MA

GNET

IC R

ELAY

(E1H

C, E

2HC)

(A1P

)M

AGN

ETIC

REL

AY (Y

4S) (

A1P)

MAG

NET

IC R

ELAY

(Y3S

) (A1

P)M

AGN

ETIC

REL

AY (Y

5S) (

A1P)

MAG

NET

IC R

ELAY

(Y6S

) (A1

P)MA

GNET

IC RE

LAY (C

URRE

NT LIM

ITING

) (A3P,

A6P)

RE

AC

TOR

MO

TOR

(C

OM

PR

ES

SO

R)

MO

TOR

(FA

N)

SWITC

HING P

OWER

SUPP

LY (A1

P, A3P,

A6P, A

8P)

LEAK

AGE

DETE

CTIO

N CI

RCUI

T (A

1P)

PHAS

E REV

ERSA

L DET

ECT C

IRCU

IT (A

1P)

RESIS

TOR

(CUR

RENT

LIMI

TING)

(A3P

, A6P

)RE

SIST

OR (C

URRE

NT S

ENSO

R) (A

6P)

RESI

STOR

(CUR

RENT

SEN

SOR)

(A3P

)RE

SISTO

R (C

URRE

NT LI

MTIN

G) (A

4P, A

7P)

TH

ER

MIS

TOR

(A

IR)

THER

MIS

TOR

(M1C

DIS

CHAR

GE)

THER

MIS

TOR

(M2C

DIS

CHAR

GE)

THER

MIS

TOR

(REC

EIVE

R IN

LET)

THER

MIST

OR (H

EAT E

XC. L

IQUI

D UP

PER)

THER

MIST

OR (H

EAT E

XC. L

IQUI

D LO

WER)

THER

MIS

TOR

(SUB

COOL

ING

GAS)

R7T

R8T

R9T

R10

TR

11T

R12

TR

13T

R14

TR

15T

S1N

PH

S1N

PL

S1PH

, S2P

HSE

G1~S

EG3

T1A

V1R

V2R

V3R

X1A

~X4A

X5A

, X6A

X13A

~X16

AX

1MX

1MY

1EY

2EY

3EY

4EY

5EY

6EY

1SY

2SY

3SY

4SY

5SY

6SZ

1C~

3CZ

1F

X10

AX

37A

S1S

S2S

THER

MIST

OR (S

UBCO

OLIN

G LIQ

UID)

THER

MIST

OR (H

EAT E

XC. G

AS. U

PPER

)TH

ERMI

STOR

(HEA

T EXC

. GAS

. LOW

ER)

THE

RM

ISTO

R (S

UC

TIO

N)

THE

RM

ISTO

R (D

EIC

ER

)TH

ERMI

STOR

(COM

P. SU

CTIO

N)TH

ERMI

STOR

(REC

EIVER

GAS

PURG

E)TH

ERM

ISTO

R (M

2C B

ODY

)TH

ERMI

STOR

(LEA

K DE

TECT

ION)

PRES

SURE

SEN

SOR

(HIG

H)PR

ESSU

RE S

ENSO

R (L

OW

)PR

ESSU

RE S

WIT

CH (H

IGH)

7-SE

GM

ENT

DISP

LAY

(A1P

)C

UR

RE

NT

SE

NS

OR

DIO

DE M

ODU

LE (A

3P, A

6P)

POW

ER M

ODU

LE (A

3P, A

6P)

POW

ER M

ODU

LE (A

4P, A

7P)

CO

NN

EC

TOR

(M1F

, M2F

)CO

NNEC

TOR (

CHEC

K THE

RESID

UAL C

HARG

E)CO

NNEC

TOR

(E1H

C, E

2HC)

TERM

INAL

STRI

P (PO

WER

SUPP

LY)

TERM

INAL

STR

IP (C

ONTR

OL) (

A1P)

ELECTR

ONIC E

XPANSI

ON VA

LVE (HE

AT EXC

. UPPER

)ELE

CTRONI

C EXPA

NSION

VALVE

(SUBCO

OLING

HEAT EX

C.)ELE

CTRON

IC EXPA

NSION

VALVE

(HEAT

EXC. LO

WER)

ELECTR

ONIC E

XPANSI

ON VAL

VE (RE

CEIVER

GAS P

URGE)

ELECTR

ONIC E

XPANSI

ON VAL

VE (RE

FRIGER

ANT CO

OLING)

ELECTR

ONIC E

XPANSI

ON VA

LVE (LE

AK DET

ECTION

)SO

LENO

ID VA

LVE (

OS O

IL RE

TURN

1)SO

LENO

ID VA

LVE (

OS O

IL RE

TURN

2)SO

LENO

ID VA

LVE (

LIQUI

D SH

UT O

FF)

FOUR

WAY

VAL

VE (H

P/LP

GAS

)FO

UR W

AY VA

LVE (

HEAT

EXC.

LOWE

R)FO

UR W

AY VA

LVE (

HEAT

EXC.

UPPE

R)NO

ISE

FILT

ER (F

ERRI

TE C

ORE)

NO

ISE

FIL

TER

(A2P

, A5P

)(W

ITH

SURG

E AB

SORB

ER)

CONN

ECTO

R FO

R OP

TION

AL A

CCES

SORI

ESCO

NNEC

TOR (

DRAIN

PAN H

EATE

R) (A1

P)CO

NNEC

TOR (

POWE

R ADA

PTOR

) (A1P

)

CO

OL/

HE

AT S

ELE

CTO

RSE

LECT

OR SW

ITCH (

FAN/C

OOL·H

EAT)

SELE

CTOR

SW

ITCH

(COO

L/HEA

T)

PO

WE

R S

UP

PLY

3~

208

/230

V 6

0Hz

PRIN

TED

CIRC

UIT

BOAR

D (M

AIN)

TERM

INAL

OF

M1C

, M2C

2D08

9130

C

266 Appendix


1.2 Indoor UnitsFXFQ07T / 09T / 12T / 15T / 18T / 24T / 30T / 36T / 48TVJU

FXFQ09P / 12P / 18P / 24P / 30P / 36P / 48PVJU

INDOOR UNIT

R2T R3T X1MS1LGRN T2PNK

A1PX2M T1WHTNE V1RF1U F2YLWC105

REDL1 X15AX18A X17A F1ORGZ1F BLU P2P2

WHTL2 P1 P1BLKX27A

PS X30AHAPGRN/YLW A2P

C21X1AX65ARED MSW+ M4SWHT PS

X8A X10AX70A MSWX7AX35AX20A X16AX7A M3SX9AX36AZ1C MSWN=1 MS M2SX33AORG BLU M1P HAPWHT BRN RED M

WHT MSW M1SX2AY1EMSM1F

NOTESA3P A4P

R1TX8A

X1M A2P A1P X2M

X36A X35AX33A

A1PA2PA3P

A4P

C21C105F1UHAP

M1FM1P

R1TR2T·R3TS1LV1RX1MX2MY1EZ1CZ1FPS

X8AX33A

X35A

X36A

PRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARD (INFRARED FLOOR SENSOR)

PRINTED CIRCUIT BOARD (INFRARED PRESENCE SENSOR)

CAPACITORCAPACITORFUSE(T, 3.15A, 250V)FLASHING LAMP(A1P, A2P) (SERVICE MONITOR GREEN)

MOTOR(INDOOR FAN)MOTOR(DRAIN PUMP)

MOTOR(SWING BLADE)

THERMISTOR(AIR)THERMISTOR(COIL)FLOAT SWITCHDIODE BRIDGETERMINAL BLOCKTERMINAL BLOCKELECTRONIC EXPANSION VALVEFERRITE CORENOISE FILTERPOWER SUPPLY CIRCUIT(A1P, A2P)

CONNECTOR FOR OPTIONAL PARTS

CONNECTOR(SELF CLEAN PANEL)CONNECTOR (ADAPTOR FOR WIRING)

CONNECTOR (POWER SUPPLY FOR ADAPTOR)

CONNECTOR(SELF CLEAN PANEL)

~

M4S

M1S

,

CONTROL BOX

(NOTE 8)

INPUT FROM OUTSIDE(NOTE 3)TRANSMISSION WIRING(NOTE 2) CENTRAL REMOTE CONTROLLER

WIRED REMOTE CONTROLLER (OPTIONAL ACCESSORY)

t˚ R1T

t˚ t˚

POWER SUPPLY1~

208/230V 60Hz

1. : TERMINAL BLOCK : CONNECTOR : FIELD WIRING2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT

IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.3. WHEN CONNECTING THE INPUT WIRING FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL

OPERATION CAN BE SELECTED BY THE REMOTE CONTROLLER. SEE INSTALLATION MANUAL FOR MORE DETAILS.

4. IN CASE OF MAIN/SUB OVER CHANGE, SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER.

5. CONNECT POWER SUPPLY OF ADAPTOR FOR WIRING TO TERMINAL BLOCK (X2M) OF INDOOR UNIT DIRECTORY.

6. X8A, X33A, X35A, X36A ARE CONNECTED WHEN THE OPTIONAL ACCESSORIES ARE BEING USED. IN CASE OF USING A SELF CLEAN PANEL, SEE THE WIRING DIAGRAM OF IT.

7. SYMBOLS SHOW AS FOLLOWS: RED: RED BLK: BLACK WHT: WHITE YLW: YELLOW GRN: GREEN ORG: ORANGE BRN: BROWN PNK: PINK BLU: BLUE

8. CLASS 2 WIRE 3D086460A

INDOOR UNIT

R2T R3TGRN S1L

t˚ t˚A1P

X2MX15AX18A X17AF1U V1RNE C105+RED

L1 +PSZ1F

-KPRWHTL2

X27A

NOTE)4PNK T2X30AWHTHAP T1X25A YLW NOTE)2YLW F2G

RN/Y

LW

ORGYLW F1BLUM1P P2 P2

P1BLK P1

X7A X36AX16AX20A X20A

Z1C Z1CN=1 N=1

M BR

N

RE

D

OR

G

BLU

RE

D

BLU

OR

G

WH

T

BR

N

WH

T

CN1MSWY1E

A2PMSMSt˚ M1S M1FM1F

R1T36~48-CLASS 09~30-CLASS

NOTES)A2P

X1M A1PX2M

X35A X33A

CONTROL BOX

M 1~

WIRED REMOTE CONTROLLER

INPUT FROM OUTSIDETRANSMISSION WIRING CENTRAL REMOTE CONTROLLER

NOTE)6 X1M

X35A NOTE)3

X33A NOTE)3

POWER SUPPLY1~

208/230V 60Hz

A1PA2P

C105F1U

HAP

KPRM1FM1PM1S

R1TR2TR3TS1L

V1RX1MX2M

Y1E

Z1CZ1FPS

X33A

X35A

PRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARD

CAPACITORFUSE ( B , 5A, 250V)

LIGHT EMITTING DIODE (SERVICE MONITOR GREEN)

MAGNETIC RELAY (M1P)MOTOR (INDOOR FAN)MOTOR (DRAIN PUMP)MOTOR (SWING FLAP)

THERMISTOR (AIR)THERMISTOR (COIL LIQUID)THERMISTOR (COIL GAS)FLOAT SWITCH

DIODE BRIDGETERMINAL STRIPTERMINAL STRIP

ELECTRONIC EXPANSION VALVE

FERRITE CORENOISE FILTERPOWER SUPPLY CIRCUIT

CONNECTOR FOR OPTIONAL ACCESSORIESCONNECTOR (ADAPTOR FOR WIRING)

CONNECTOR (GROUP CONTROL ADAPTOR)

1. : TERMINAL, • : CONNECTOR,

: FIELD WIRING,

: PROTECTIVE GROUND (SCREW), : NOISELESS GROUND

2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO

THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION

MANUAL.

3. X33A AND X35A ARE CONNECTED WHEN THE OPTIONAL

ACCESSORIES ARE USED.

4. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR

ON/OFF CONTROL OPERATION CAN BE SELECTED BY THE REMOTE

CONTROLLER. SEE INSTALLATION MANUAL FOR MORE DETAILS.

5. SYMBOLS SHOW AS FOLLOWS:

RED: RED BLK: BLACK WHT: WHITE YLW: YELLOW GRN: GREEN

ORG: ORANGE BRN: BROWN PNK: PINK GRY: GRAY BLU: BLUE

6. CLASS 2 WIRE

3D070301G

Appendix 267


FXZQ07M / 09M / 12M / 15M / 18MVJU9

FXDQ07M / 09M / 12M / 18M / 24MVJU

R2T R3TR1T

t˚t˚ t˚A1P NOTE)6

T2PNKX13A X12A X11AX2M T1WHTF1U

F2YLWREDL1F1ORGWHTL2 T1RX1A X3A P2BLUX31AGRN/YLW t˚ P1BLK

X1MX30A P2P1C1KPR

V1TRA3P A4PA1P X4A WHT

YLW

SS1 H1P REDBS1H2P X25ASS2 Q1MBLKH3P YLW M1FX2A H4P YLWX1AX1A M1P MSW

M X28A M1SHAP

X7AY1EX8A

S1LC1

T1RX1M

X2MA1P

BS1H1P

H2P

H3P

H4P

SS1

SS2

X16A

X18A

X23A

BS BUTTON (ON/OFF)PILOT LAMP (ON-RED)PILOT LAMP (TIMER-GREEN)PILOT LAMP (FILTER SIGN-RED)PILOT LAMP (DEFROST-ORANGE)SELECTOR SWITCH (MAIN/SUB)SELECTOR SWITCH (WIRELESS ADDRESS SET)

CONNECTOR FOR OPTIONAL PARTSCONNECTOR (ADAPTOR FOR WIRING)CONNECTOR (WIRING ADAPTOR FOR ELECTRICAL APPENDICES)

CONNECTOR (WIRELESS REMOTE CONTROLLER)

PRINTED CIRCUIT BOARDCAPACITOR (M1F)FUSE ( B , 5A, 250V)PILOT LAMP (SERVICE MONITOR GREEN)MAGNETIC RELAY (M1P)FAN MOTORDRAIN PUMP MOTORSWING LOUVER MOTORTHERMAL PROTECTOR (M1F EMBEDDED)THERMISTOR (AIR)THERMISTOR (COIL-LIQUID)THERMISTOR (COIL-GAS)FLOAT SWITCHTRANSFORMER (208-230V/25V)TRIACTERMINAL BLOCKTERMINAL BLOCKELECTRONIC EXPANSION VALVE

WIRELESS REMOTE CONTROLLER (RECEIVER/DISPLAY UNIT)

PRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARD

A1PC1F1UHAP

KPRM1FM1PM1SQ1MR1TR2TR3TS1LT1RV1TRX1MX2MY1E

A3PA4P

CONTROL BOX

POWER SUPPLY1~

208/230V 60Hz

RECEIVER/DISPLAY UNIT (OPTIONAL ACCESSORY)

M 1~

X23A NOTE)3

X23A NOTE)3

INPUT FROM OUTSIDE NOTE)4

TRANSMISSION WIRING CENTRAL REMOTE CONTROLLER

NOTE)2


M 1~

X16A NOTE)3

X18A NOTE)3

NOTES)1. : TERMINAL

, : CONNECTOR

: FIELD WIRING

: PROTECTIVE GROUND (SCREW)2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.3. X16A, X18A AND X23A ARE CONNECTED WHEN THE OPTIONAL ACCESSORIES ARE USED.4. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER.

IN DETAILS, REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT.5. SYMBOLS SHOW AS FOLLOWS: RED: RED BLK: BLACK WHT: WHITE YLW: YELLOW PNK: PINK ORG: ORANGE GRN: GREEN BLU: BLUE6. CLASS 2 WIRE

3D080350C

R2TR1T R3T

t˚t˚ t˚ A1P

T2PNKX13A X12A X16AX11A

T1WHTX2M F2YLWF1U X30A

REDL1 F1ORG

P2BLU P2BLUL2X1A T1R P1 P1BLKX3AX31A

t˚

X18A

X27AKPR

GRYPPL

X25A BLUMC1

Y1E V1TR

WHT

YLW

M1PX7AX16AX18A RED

Q1MBLKM1FA1P X4AX8A HAP

X1M C1 S1LX2M

Z1CT1R

Z2C

POWER SUPPLY

1~ 208/230V

60Hz

GRN /YLW

CONTROL BOX

M 1~

M 1~

Z2C N=3

Z1C N=3

NOTE)7 X1M

NOTE)5 INPUT FROM OUTSIDETRANSMISSION WIRING CENTRAL REMOTE CONTROLLER

NOTE)3


A1P

C1

F1U

HAP

KPR

M1F

M1P

Q1M

R1T

R2T

R3T

S1L

T1R

V1TR

X1M

X2M

Y1E

Z1C·Z2C

X16A

X18A

PRINTED CIRCUIT BOARD

CAPACITOR (M1F)

FUSE (F5A/250V)

LIGHT EMITTING DIODE

(SERVICE MONITOR GREEN)

MAGNETIC RELAY (M1P)

MOTOR (INDOOR FAN)

MOTOR (DRAIN PUMP)

THERMAL PROTECTOR (M1F EMBEDDED)

THERMISTOR (AIR)

THERMISTOR (COIL-1)

THERMISTOR (COIL-2)

FLOAT SWITCH

TRANSFORMER (208-230V/25V)

PHASE CONTROL CIRCUIT

TERMINAL BLOCK

TERMINAL BLOCK


NOISE FILTER (FERRITE CORE)


CONNECTOR (ADAPTOR FOR WIRING)

CONNECTOR (WIRING ADAPTOR FOR

ELECTRICAL APPENDICES)

NOTES)

1. : TERMINAL

, : CONNECTOR

2. : FIELD WIRING3. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.4. REMOTE CONTROLLER MODEL VARIES ACCORDING TO THE COMBINATION SYSTEM, CONFIRM ENGINEERING DATA AND CATALOGS, ETC. BEFORE CONNECTING.5. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER.

IN DETAILS, REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT.6. SYMBOLS SHOW AS FOLLOWS: RED: RED BLK: BLACK WHT: WHITE YLW: YELLOW PPL: PURPLE GRY: GRAY BLU: BLUE PNK: PINK ORG: ORANGE GRN: GREEN7. CLASS 2 WIRE

3D050501B

268 Appendix


FXMQ07PB / 09PB / 12PB / 15PB / 18PB / 24PB / 30PB / 36PB / 48PB / 54PBVJU

FXMQ72M / 96MVJU

GRN R3T R4TR2TR1TM1PN=1 S1L

Z2C YLW

YLW

A1PNOTE)5X25AN=1 F1URED X15AX13AX17AX18AX16A NOTE)7

PNKKPRL1 Z1F T2BLU WHTX38A T1C5 YLWL2 X27A F2X30A ORGZ1C F1V1RX1MP2PS HAP P1BL

U

++ R3C2 C3 R4 X2MBLKX35AX70A X7A X33AX28AA3PL1R

BLK

BLK

A2PL1RX6A X9A MX3A Y1E P2A2PX1A N=8R5T P1BLK X6AX3AF3U M1FRED t˚ R1C1 WHT REDF4UZ1FBLU K1R RED

F2UC1RED BLU K1R M1FX10A R2 Z1F Z2CL1R X28AYLW BLU MSZ3CV2RV1R 5BLU BRNX10AG

RN

R2ORG ORGV1R A2P X35AHAP GR

N

PNK WHTX38APSPS GRY HAPX2A X8A

X2MX1M X33A

A1P

A2P

A3P

C1, C2,C3, C5F1UF2UF3UF4U

HAP

KPRK1RL1RM1FM1P

PS

R1

R2

R3, R4

R1TR2T

PRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARD (FAN)PRINTED CIRCUIT BOARD (CAPACITOR)

CAPACITOR

FUSE (T, 3.15A, 250V)FUSE (T, 5A, 250V)FUSE (T, 6.3A, 250V)FUSE (T, 6.3A, 250V)FLASHING LAMP (A1P, A2P) (SERVICE MONITOR GREEN)MAGNETIC RELAYMAGNETIC RELAYREACTORMOTOR (INDOOR FAN)MOTOR (DRAIN PUMP)POWER SUPPLY CIRCUIT (A1P, A2P)RESISTOR (CURRENT LIMITING)

CURRENT SENSING DEVICERESISTOR (ELECTRIC DISCHARGE)THERMISTOR (SUCTION AIR)THERMISTOR (LIQUID)

R3T

R4T

R5T

S1LV1R

V2R

X1M

X2M

Y1E

Z1C, Z2C, Z3CZ1F

X28A

X33A

X35A

X38A

THERMISTOR (GAS)THERMISTOR (DISCHARGE AIR)THERMISTOR NTC (CURRENT LIMITING)FLOAT SWITCHDIODE BRIDGE (A1P, A2P)

POWER MODULETERMINAL BLOCK (POWER SUPPLY)TERMINAL BLOCK (CONTROL)ELECTRONIC EXPANSION VALVE

FERRITE CORE

NOISE FILTER (A1P, A2P)CONNECTOR FOR OPTIONAL ACCESSORIES

CONNECTOR (POWER SUPPLY FOR WIRING)CONNECTOR (ADAPTOR FOR WIRING)CONNECTOR (POWER SUPPLY FOR ADAPTOR)CONNECTOR (ADAPTOR FOR MULTI TENANT)

INDOOR UNIT

1. : TERMINAL, : CONNECTOR, : FIELD WIRING, : PROTECTIVE GROUND (SCREW), : NOISELESS GROUND2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.3. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER.

IN DETAILS, REFER TO THE INSTALLATION MANUAL ATTACHED THE UNIT.4. COLORS BLK: BLACK RED:RED BLU:BLUE WHT:WHITE PNK:PINK YLW:YELLOW BRN:BROWN GRY:GRAY GRN:GREEN ORG:ORANGE.5. FOR FXMQ15·18·24·30·36·48·54·PBVJU ARE N=26. ONLY FOR FXMQ54PBVJU7. CLASS 2 WIRE

NOTES)

CONTROL BOX (INDOOR)ONLY FXMQ15·18·24·30·36·48·54PBVJU

INPUT FROM OUTSIDE NOTE)3

( )

A 1 P

A 3 P

Z 1 C

t˚t˚ t˚t˚GRN/YLW

POWER SUPPLY

1~ 208/230V

60Hz

FOR FXMQ15·18·24·30·36·48·54PBVJU

TO X70A(A1P)TO X1M

NOTE) 6. FOR FXMQ07·09·12PBVJUTO X1M

MS 3~

M 1 ~

TRANSMISSION WIRING CENTRAL REMOTE CONTROLLER OPTIONAL ACCESSORY NOTE)2


3D093209A

INDOOR UNITEL. COMPO. BOX

POWER SUPPLY K3MK2MK1M SS C1 C2X18A

T1R X3M

X2MA1PX1M X8A

L2L1 X1MX4MR3TR1T R2T

t˚t˚ t˚RED WHTA1PREDRED REDWHT WHTWHT REDRED REDWHT WHTWHT

L NK1M X13A X12A X11A X8AF1U NOTE-8X18APNKX3A HAP T2T2WHTK2M T1R T1T1YLW

NOTES)

F2 F2X30A ORGK3M t˚ F1 F1X1A BLURED REDRED KPRK2RK1R K3RWHT WHTWHTRED REDRED

WHTWHTWHT P2(2)

(2)

(2)

(1)

(1)

(1) (3)

(3)

(3)

(4)

(4)(5)

(5)

(5)

(6)

(6)

(13)

(14)(13)

(14)

(13)

(14)(4) (6) P282 5 11BLKSSSS P1LH LH P1

FC FLFH FLL X7A X4M41 106 793 12 X4A Y1Y2X2M X3M RED ORGBLK BRN

WHT11 14 2112 13 15 252322 24 (A2)(A2) (A2)P1 P2ORGBRNBLK BLURED ORG BRNBLK BLURED MK3MK2MK1M

X3MX2M (A1) (A1)(A1) Y1EWHTWHTWHT16 26Q1M Q2MC2C1YLW

WHT

YLW17 27 YLWYLWM1F M2F

1~ 208/230V

60Hz


NOTE-4 INPUT FROM OUTSIDENOTE-3 TRANSMISSION WIRING CENTRAL REMOTE

CONTROLLER

M 1~ M

1~

1. : TERMINAL BLOCK

, : CONNECTOR

: SHORT CIRCUIT CONNECTOR

: TERMINAL

2. : FIELD WIRING


THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.

4. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL

OPERATION CAN BE SELECTED BY REMOTE CONTROLLER. IN DETAILS, REFER TO

THE INSTALLATION MANUAL ATTACHED THE UNIT.

5. SYMBOLS SHOW AS FOLLOWS. (PNK: PINK WHT: WHITE YLW: YELLOW

ORG: ORANGE BLU: BLUE BLK: BLACK RED: RED BRN: BROWN)

6. USE COPPER CONDUCTORS ONLY.

7. IN CASE HIGH E.S.P. OPERATION, CHANGE THE SWITCH (SS) FOR "H".

8. CLASS 2 WIRE.

A1PC1•C2F1UHAP

K1MK2MK3MK1R-K3RKPRM1F•M2FQ1M•Q2M

PRINTED CIRCUIT BOARDCAPACITOR (M1F•2F)FUSE ( B , 5A, 250V)LIGHT EMITTING DIODE (SERVICE MONITOR-GREEN)MAGNETIC CONTACTOR (M1F•2F)MAGNETIC CONTACTOR (M1F•2F)MAGNETIC CONTACTOR (M1F•2F)MAGNETIC RELAY (M1F•2F)MAGNETIC RELAY (M1P)MOTOR (INDOOR FAN)THERMO. SWITCH (M1F•2F EMBEDDED)

R1TR2T•R3TSS

T1RX1MX2M-X3MX4MY1E

X8AX18A

THERMISTOR (AIR)THERMISTOR (COIL)SELECTOR SWITCH

(STATIC PRESSURE)TRANSFORMER (208V/230V 25VA)TERMINAL BLOCK (POWER)TERMINAL BLOCKTERMINAL BLOCK (CONTROL)ELECTRONIC EXPANSION VALVE

CONNECTOR FOR OPTIONAL PARTSCONNECTOR (FLOAT SWITCH)CONNECTOR (WIRING ADAPTOR FOR ELECTRICAL APPENDICES)

3D065414D

Appendix 269


FXHQ12M / 24M / 36MVJU

FXAQ07P / 09P / 12P / 18P / 24PVJU

POWER SUPPLY

A3PA2PA1P X2A H1PSS1

BS1H2PH3PSS2X23AX1M H4PX1AX1AR3TR2TR1T

L2L1t˚t˚t˚

WHTREDA1P

X13A X12A X8AX11AX31A

NOTES) NOTE-8F1U X18AHAP

PNKX3A T2T2WHT T1T1YLW F2F2

X30A ORG F1t˚ V1TR F1X1ABLU P2P2BLK P1T1R P1

KAR KPR X2MX27A X23AX9A X25AX6AX4A X7A

P1 P2BLK REDYLW WHT WHT

C1WHTM

S1Q M1S Y1EBLK X18A

)

1 C1X23AQ1M T1RA1PM1F X2M X1MX8A

CONTROL BOX

1~ 208/230V 60Hz

NOTE-4 RECEIVER/DISPLAY UNIT (WIRELESS REMOTE CONTROLLER)

NOTE-5 INPUT FROM OUTSIDE

NOTE-3 TRANSMISSION WIRING CENTRAL REMOTE CONTROLLER


M ~

MSW 1~

1. : TERMINAL BLOCK , : CONNECTOR


2. : FIELD WIRING

3. IN CASE USING CENTRAL REMOTE CONTROLLER,

CONNECT IT TO THE UNIT IN ACCORDANCE WITH

THE ATTACHED INSTALLATION MANUAL.

4. X23A IS CONNECTED WHEN THE WIRELESS REMOTE

CONTROLLER KIT IS BEING USED.

5. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE,

FORCED OFF OR ON/OFF CONTROL OPERATION CAN BE

SELECTED BY REMOTE CONTROLLER. IN DETAILS, REFER

TO THE INSTALLATION MANUAL ATTACHED THE UNIT.

6. SYMBOLS SHOW AS FOLLOWS.

BLU: BLUE BLK: BLACK ORG: ORANGE PNK: PINK

RED: RED WHT: WHITE YLW: YELLOW


8. CLASS 2 WIRE

(

INDOOR UNITA1PC1F1UHAP

KARKPRM1FM1SQ1MR1TR2TR3TS1QT1RV1TRX1MX2MY1E

A2PA3PBS1H1PH2P

H3P

PRINTED CIRCUIT BOARDCAPACITOR (M1F)FUSE ( B 5A, 250V)LIGHT EMITTING DIODE

(SERVICE MONITOR-GREEN)MAGNETIC RELAY (M1S)MAGNETIC RELAYMOTOR (INDOOR FAN)MOTOR (SWING FLAP)THERMO. SWITCH (M1F EMBEDDED)THERMISTOR (AIR)THERMISTOR (COIL LIQUID)THERMISTOR (COIL GAS)LIMIT SWITCH (SWING FLAP)TRANSFORMER (208-230V/25V)TRIACTERMINAL BLOCK (POWER)TERMINAL BLOCK (CONTROL)ELECTRONIC EXPANSION VALVE

RECEIVER/DISPLAY UNIT (ATTACHED TO WIRELESS REMOTE CONTROLLER)

PRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARDBS BUTTON (ON/OFF)LIGHT EMITTING DIODE (ON-RED)LIGHT EMITTING DIODE (TIMER-GREEN)LIGHT EMITTING DIODE (FILTER SIGN-RED)

H4P

SS1SS2

X18A

X23A

LIGHT EMITTING DIODE (DEFROST-ORANGE)SELECTOR SWITCH (MAIN/SUB)SELECTOR SWITCH (WIRELESS ADDRESS SET)

CONNECTOR FOR OPTIONAL PARTSCONNECTOR (WIRING ADAPTOR FOR

ELECTRICAL APPENDICES)CONNECTOR (WIRELESS

REMOTE CONTROLLER)

3D048116B

R1TR2TR3TGRN/YLW GRNA2P A3P

SS1 H1Pt˚t˚ t˚A1P X2A BS1H2P

H3PSS2X14A X18A X19AH4PX27A NE V1RRED C5+L1 X1A X1A+Z1F PSF1U

WHT - PNKL2 T2 INPUT FROM OUTSIDE (NOTE)4WHT T1WHTX2M YLW F2HAP X30AX15A ORG F1A1P BLU P2X36AX20A X7A BLK P1A1P X2M

X2MP2

OR

G

RE

D

BLU

BR

N

WH

T

P1HAPX1M

SIDE X1M MS MMSWHAP FRONT

M1S Y1EM1FCONTROL BOX

INDOOR UNIT

A1P

C5

F1U

HAP

M1F

M1S

R1T

R2T

R3T


CAPACITOR

FUSE (T3.15AH 250V)

FLASHING LAMP

(SERVICE MONITOR GREEN)

MOTOR (INDOOR FAN)

MOTOR (SWING FLAP)

THERMISTOR (AIR)

THERMISTOR (COIL LIQUID PIPE)

THERMISTOR (COIL GAS PIPE)

V1R

X1M

X2M

Y1E

Z1F

PS

A2P

A3P

BS1

DIODE BRIDGE

TERMINAL BLOCK (CONTROL)

TERMINAL BLOCK (POWER)


NOISE FILTER

SWITCHING POWER SUPPLY

RECEIVER/DISPLAY UNIT (ATTACHED

TO WIRELESS REMOTE CONTROLLER)



BS BUTTON (ON/OFF)

H1P

H2P

H3P

H4P

SS1

SS2

X15A

X24A

X35A

X38A

PILOT LAMP (ON-RED)

PILOT LAMP (TIMER-GREEN)

PILOT LAMP (FILTER SIGN-RED)

PILOT LAMP (DEFROST-ORANGE)

SELECTOR SWITCH (MAIN/SUB)

SELECTOR SWITCH

(WIRELESS ADDRESS SET)


CONNECTOR (FLOAT SWITCH)

CONNECTOR (WIRELESS REMOTE CONTROLLER)

CONNECTOR (GROUP CONTROL ADAPTOR)

CONNECTOR (ADAPTOR FOR MULTI TENANT)

POWER SUPPLY 1~ 208/230V

60Hz

X35A (NOTE)7

X38A (NOTE)7

X24A (NOTE)7

X1M (NOTE)8

TRANSMISSION WIRING CENTRAL REMOTE CONTROLLER

(NOTE)2


RECEIVER/DISPLAY UNIT (WIRELESS REMOTE CONTROLLER)

(NOTES)

1. : TERMINAL

: FIELD WIRING

: CONNECTOR

: CONNECTOR

: PROTECTIVE GROUND (SCREW)

: NOISELESS GROUND


2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.

3. SYMBOLS SHOWS AS FOLLOWS: RED: RED WHT: WHITE GRN: GREEN PNK: PINK YLW: YELLOW BLK: BLACK ORG: ORANGE BRN: BROWN BLU: BLUE

4. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER. IN DETAILS, REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT.

5. REMOTE CONTROLLER MODEL VARIES ACCORDING TO THE COMBINATION SYSTEM, CONFIRM ENGINEERING DATA AND CATALOGS, ETC. BEFORE CONNECTING.

6. CONFIRM THE METHOD OF SETTING THE SELECTOR SWITCH (SS1, SS2) OF WIRELESS REMOTE CONTROLLER BY INSTALLATION MANUAL AND ENGINEERING DATA, ETC.

7. X15A, X24A, X35A AND X38A ARE CONNECTED WHEN THE OPTIONAL ACCESSORIES ARE BEING USED.

8. CLASS 2 WIRE

3D075354B

270 Appendix


FXUQ18P / 24P / 30P / 36PVJU

FXLQ07M / 09M / 12M / 18M / 24MVJUFXNQ07M / 09M / 12M / 18M / 24MVJU

INDOOR UNIT

R2T R3T T2PNKS1LPOWER SUPPLYINDOOR UNIT

WHT T1GRN t˚ t˚X2M A1PYLW F2V1RNEF1U C105+L1 RED X15A X18A X17A F1ORG+

Z1F X30AL2 WHT - BLU P2P2X27A BLK P1P1

GRN/YLW HAP MSWX35A M4SPSX36A

MSW M3S

X7A X20AX25AMSW M2S

N=1Z1C X81AMSWX16A M1SX81AORG BLUMSM M1P

BRNX81AX35A REDWHTY1E t˚

R1T WHTR1T

MS A3P A4PM1F A3P A4PA1P

X2MX1M Installation position 2

NOTESCONTROL BOX Installation position 1

CONTROL BOX

Installation position of SENSOR KIT

1~ 208/230V

60Hz

SENSOR KIT (Option) Installation position 1

SENSOR KIT (Option) Installation position 2

(NOTE 6) X1M

INPUT FROM OUTSIDE (NOTE 5)

TRANSMISSION WIRING (NOTE 2) CENTRAL REMOTE CONTROLLER

WIRED REMOTE CONTROLLER (OPTIONAL ACCESSORY) (NOTE 3)

1. : TERMINAL BLOCK , : CONNECTOR : FIELD WIRING

2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE

UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.

3. IN CASE OF MAIN/SUB CHANGEOVER,

SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER.

4. SYMBOLS SHOW AS FOLLOWS: BLK: BLACK RED: RED BLU: BLUE WHT: WHITE

YLW: YELLOW GRN: GREEN ORG: ORANGE BRN: BROWN PNK: PINK.

5. WHEN CONNECTING THE INPUT WIRING FROM OUTSIDE, FORCED OFF OR ON/OFF CONTROL OPERATION

CAN BE SELECTED BY THE REMOTE CONTROLLER. SEE INSTALLATION MANUAL FOR MORE DETAILS.

6. CLASS 2 WIRE

A1PC105F1UHAP

M1FM1PM1S•M2SM3S•M4SR1TR2T•R3TS1LV1RX1MX2MY1EZ1FZ1CPS

A3PA4P

X35A

X81A

PRINTED CIRCUIT BOARDCAPACITOR (M1F)FUSEFLASHING LAMP (SERVICE MONITOR GREEN)MOTOR (INDOOR FAN)MOTOR (DRAIN PUMP)

MOTOR (SWING BLADE)

THERMISTOR (AIR)THERMISTOR (COIL)FLOAT SWITCHDIODE BRIDGETERMINAL BLOCKTERMINAL BLOCKELECTRONIC EXPANSION VALVENOISE FILTERFERRITE COREPOWER SUPPLY CIRCUIT

SENSOR KITPRINTED CIRCUIT BOARDPRINTED CIRCUIT BOARD

CONNECTOR FOR OPTIONAL PARTSCONNECTOR (POWER SUPPLY FOR ADAPTOR)CONNECTOR (SENSOR KIT)

3D090218

POWER SUPPLY

GRN/YLWR3TR2TR1T

X1ML1 L2

t˚t˚t˚RED WHT

A1PL2L1 X8AX11AX13A X12A

F1U HAPX18A

X3ANOTE-7X30ANOTES) T1R PNK T2T2

WHT T1T1t˚ YLWX1A F2 F2ORG F1F1BLUK3RK1R K2R P2P2BLK P1P1

FLLFLFH X7AFC T1RX4A X2MX18A

C1 WHTORGBLKRED BRN A1PYLWWHT

P2P1WHT MWHT REDYLW BRNBLK ORG

Y1E X2MX1M1Q1M CONTROL BOX

M1F

1~ 208/230V

60Hz

NOTE-4INPUT FROM OUTSIDENOTE-3TRANSMISSION WIRING CENTRAL REMOTE CONTROLLER


M ~

1. : TERMINAL BLOCK, , : CONNECTOR, TERMINAL

2. : FIELD WIRING, SHORT CIRCUIT CONNECTOR


THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.

4. WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE, FORCED OFF OR ON/OFF

CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER. IN DETAILS,

REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT.

5. SYMBOLS SHOW AS FOLLOWS. (PNK: PINK WHT: WHITE YLW: YELLOW

ORG: ORANGE BLU: BLUE BLK: BLACK RED: RED BRN: BROWN GRN: GREEN)


7. CLASS 2 WIRE.

INDOOR UNITA1PC1F1UHAP

K1R-K3RM1FQ1M

R1TR2T·R3TT1RX1M

PRINTED CIRCUIT BOARDCAPACITOR (M1F)FUSE ( B , 5A, 250V)LIGHT EMITTING DIODE (SERVICE MONITOR-GREEN)MAGNETIC RELAY (M1F)MOTOR (INDOOR FAN)THERMO. SWITCH (M1F EMBEDDED)THERMISTOR (AIR)THERMISTOR (COIL)TRANSFORMER (208-230V/25V)TERMINAL BLOCK (POWER)

X2MY1E

X18A

TERMINAL BLOCK (CONTROL)ELECTRONIC EXPANSION VALVE

CONNECTOR FOR OPTIONAL PARTSCONNECTOR (WIRING ADAPTOR FOR ELECTRICAL APPENDICES)

3D045644C

Appendix 271


FXTQ12PA / 18PA / 24PA / 30PA / 36PA / 42PA / 48PA / 54PAVJU

3D065036G

272 Appendix

Revision History

Month / Year Version Revised contents

06 / 2015 SiUS341504E First edition

Daikin products are manufactured for export to numerous countries throughout the world. Prior to purchase, please confirm with your local authorized importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used. This statement does not purport to exclude, restrict or modify the application of any local legislation.

Ask a qualified installer or contractor to install this product. Do not try to install the product yourself. Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.

Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

Read the user's manual carefully before using this product. The user's manual provides important safety instructions and warnings. Be sure to follow these instructions and warnings.

If you have any inquiries, please contact your local importer, distributor and/or retailer.

Cautions on product corrosion1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install

the outdoor unit close to the sea shore, contact your local distributor.

Dealer

Specifications, designs and other content appearing in this brochure are current as of June 2015 but subject to change without notice.

SiUS341504E06/2015 K AK

All rights reservedc

Service Manual - Daikin AC

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