INDOOR UNIT FH052EAMT FH070EAMT OUTDOOR UNIT UH052EAMT UH070EAMT SERVICE Manual CONTENTS AIR CONDITIONER 1. Product Specifications 2. Disassembly and Reassembly 3. Refrigerating Cycle Diagram 4. Set Up the Model Option 5. Control Specification & Troubleshooting 6. Exploded Views and Parts List 7. PCB Diagram 8. Wiring Diagram 9. Schematic Diagram CEILING TYPE AIR CONDITIONER
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SERVICE Manual SAMSUNG...2 Samsung Electronics Table(cont.) Type Refrigerant Charge g Adding Charge g/m Control Heat Exchanger Type Row x Stages x Fin Pitch Dimensions H mm Wmm Dmm
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INDOOR UNITFH052EAMTFH070EAMT
OUTDOOR UNITUH052EAMTUH070EAMT
SERVICE Manual
CONTENTSAIR CONDITIONER
1. Product Specifications
2. Disassembly and Reassembly
3. Refrigerating Cycle Diagram
4. Set Up the Model Option
5. Control Specification & Troubleshooting
6. Exploded Views and Parts List
7. PCB Diagram
8. Wiring Diagram
9. Schematic Diagram
CEILING TYPE AIR CONDITIONER
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1Samsung Electronics
1. Product Specifications
1-1 Table
CoolingBtu/h
CapacityW
HeatingBtu/h
W
Power Supply ø/V/Hz
Power InputCooling W
Heating W
Running Cooling A
Current Heating A
H.H r.p.m
Fan SpeedHi r.p.m
Mid r.p.m
Low r.p.m
H.H m3/min
Air FlowHi m3/min
Mid m3/min
Low m3/min
Noise Level(Hi) Cooling(Hi) dB(A)
(Sound Pressure) Heating(Hi) dB(A)
Heat ExchangerType
Row x Stages x Fin Pitch
FanType
Motor Output W
H mm
Dimensions W mm
D mm
Weight Net / Gross kg
Fan SpeedHi r.p.m
Low r.p.m
Air Flow(Hi) m3/min
Noise Level Cooling(Hi) dB(A)
(Sound Pressure) Heating(Hi) dB(A)
FanType
Motor Output W
Type
CompressorModel
Motor Output kW
Protection
18,700
5,500
20,400
6,000
1/220 ~ 240/50
1,800
1,850
8.0
8.2
-
1,020
920
820
-
12
11
10
48
48
Slit
3 x 12 x 1.5mm
Sirocco
90
200
1,000
650
22 / 26
750
400
45
60
61
Propeller
60
Rotary
NN21VBAMT
1.3
Internal
FH070EAMT
UH070EAMT
FH052EAMT
UH052EAMTMODEL
INDOOR UNIT
OUTDOOR UNIT
23,800
7,000
26,100
7,700
1/220 ~ 240/50
2,400
2,600
11.0
11.9
-
1,160
1,060
960
-
14
13
12
48
48
Slit
3 x 12 x 1.5mm
Sirocco
90
200
1,000
650
22 / 26
850
340
51
60
61
Propeller
73
Rotary
NN29VACMT
1.9
Internal
IndoorUnit
OutdoorUnit
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Samsung Electronics2
Table(cont.)
Type
RefrigerantCharge g
Adding Charge g/m
Control
Heat ExchangerType
Row x Stages x Fin Pitch
DimensionsH mm
W mm
D mm
Weight Net / Gross kg
Pipe O.D SizeLiquid mm(inch)
Gas mm(inch)
Connection Method
BetweenHeight m
Pipe Length m
R410a
1,550
25
Elec.Expansion Valve
Slit
2 x 28 x 1.5mm
648
880
310
67 / 72
6.35(1/4")
12.7(1/2")
Flare
15
30
FH070EAMT
UH070EAMT
FH052EAMT
UH052EAMTMODEL
INDOOR UNIT
OUTDOOR UNIT
R410a
1,650
30
Elec.Expansion Valve
Slit
2 x 28 x 1.5mm
648
880
310
69 / 74
6.35(1/4")
15.88(5/8")
Flare
15
30
OutdoorUnit
Piping
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3Samsung Electronics
(Unit : mm)
1-2 Dimensions
1-2-1 Indoor Unit
Air flow blade(up/down)
Air flow blade(right / left)
Air filter
Front grille
Remote controlsensor
Defrosting indicator
Filter sign indicator
Fan indicatorAuto indicator
Timer indicator
Operation indicator
On/Off button
45
50
240
200
650
197
922
1,000
Back side
Pipe outlet (bottom side)
Drain hose outlet
Wiring hole
Air intake hole (Ø50)
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880
648
310
Product Specifications
Samsung Electronics4
1-2-2 Outdoor Unit
(Unit : mm)
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5Samsung Electronics
2. Disassembly and Reassembly
2-1 Indoor Unit
Stop operation of the air conditioner and remove the power cord before repairing the unit.
No Parts Procedure Remark
1 ElectricalPart
1) Open the grille by pressing 3 position.(center and both side)
2) Detach the air inlet grille.
3) Open the cover of component electricalbox by removing 3 screws.(center and both side)
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Samsung Electronics6
Disassembly and Reassembly
No Parts Procedure Remark
2 Fan & Motor 1) Detach the screw and untie earthwire of motor.
2) Disconnect of housing of motor wire.
3) Disconnect the capacitor wire.
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7Samsung Electronics
Disassembly and Reassembly
No Parts Procedure Remark
4) Loosen the guard safety by removing 6 screws.
5) Detach the upper case of fan. (2EA)
6) Loosen the 4 screws what is fix the motor.
7) Detach the fan and motor assembly.
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Samsung Electronics8
Disassembly and Reassembly
No Parts Procedure Remark
3 Drain Pan
8) Loosen the set fixing bolts.(with a M3 wrench)
9) Detach the fan.
1) Disconnect the display pcb wire as shownin picture. (white housing)
2) Disconnect the step motor wire as shownin picture. (blue housing)
3) Disassemble the hanger bracket by removing the 1 screw.
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9Samsung Electronics
Disassembly and Reassembly
No Parts Procedure Remark
4) Loosen the 3 screws of front side.
5) Disassemble the assembly front cover part.
6) Disconnect the step motor wire as shown in picture.
7) Detach the wire clamp fixed in base part.
8) Detach the front cover assembly completely.
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Samsung Electronics10
Disassembly and Reassembly
No Parts Procedure Remark
9) Loosen the screw what is fix with base part and drain pan. (upper side:2EA)
10) Loosen the screw what is fix with basepart and drain pan.(lower side:2EA)
11) Detach the drain pan completely.
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11Samsung Electronics
Disassembly and Reassembly
No Parts Procedure Remark
4 Evaporator 1) Disconnect the thermistor wire as shown in picture. (white housing)
2) Loosen the 2 screws shown in picture.
3) Loosen the 2 screws shown in picture and remove plastic part. (white)
4) Loosen the 2 screws shown in picture and remove steel bracket.
5) Disassemble the 4 screws steel plate inrear side of the unit.
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Samsung Electronics12
Disassembly and Reassembly
No Parts Procedure Remark
6) Loosen the 2 screws as shown in picture.
7) Detach the plastic cover as shown in picture.
8) Detach the evaporator assembly.
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13Samsung Electronics
Disassembly and Reassembly
No Parts Procedure Remark
5
6
Stepping Motor
Display PCB
1) Loosen the 4 screws in rear side of frontcover assembly as shown in picture.
2) Loosen the 2 screws as shown in picture.
3) Disassemble the blade and steppingmotor assembly and remove the 2 screwsstepping motor.
1) Loosen the 3 screws in rear side of frontcover assembly as shown in picture.
2) Disassemble display PCB assembly and disconnect wire.
3) Disassemble the display PCB.
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Samsung Electronics14
No Parts Procedure Remark
1
2
Cabinet
Fan Motor&
Propeller Fan
1) Turn off the unit and remove the powercable.
2) Detach the top cover.3) Detach the control box cover.4) Unplug the ass'y cable.5) Detach the cabi-side.6) Detach the cabi-front.
CautionsWhen you assemble the parts, check if theeach parts and component electric box are fixed firmly.
1) Loosen the indicating bolt screw.2) Disassemble the propeller fan.
2nd Press the temperature button simultaneously and insert the battery again.
3rd Make sure the remocon display shown as .
Step 2 : Enter the Option Setup mode and select your option according to the following procedure.
1
2
3
4
5
6
1
2
The default value is .
Otherwise, push the button to .
Every time you push the button, the display panel reads or
repeatedly.
Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
Setting is not required if you must
a value which has a default.
3Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
4Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
5Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
6Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
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Set Up the Model Option
17Samsung Electronics
7
8
9
10
11
12
7
8
The default value is .
Otherwise, push the button to .
Every time you push the button, the display panel reads or
repeatedly.
Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
Setting is not required if you must
a value which has a default.
9Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
10Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
11Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
12Push the button to set the display panel to .
Every time you push the button, the display panel reads . . . repeatedly.
Step 3 : Upon completion of the selection, check you made right selections.
Press the Mode Selection key, to set the display part to and check the display part.
The display part shows .
Press the Mode Selection key, to set the display part to and check the display part.
The display part shows .
Step 4 : Pressthe ON/OFF button .When pressing the operation ON/OFF key with the direction of remote controller for unit, the sound “Ding” or “Diriring” isheard and the OPERATION LED lamp is flickering at the same time, then the input of option is completed. (If the diriring sound isn’t heard, try again pressing the ON/OFF button.)
Step 5 : Unit operation test-runFirst, Remove the battery from the remote controller.Second, Re-insert the battery into the remote controller.Third, Press ON/OFF button( ) with the direction of remote controller for set.
Example : When the installed indoor unit is one, control the arrow of switchforward to ‘0’ or ‘1’ as figure.
Setting switch for indoor unit installation numbers
Data display part
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Samsung Electronics20
Control Specification & Troubleshooting
5-1-3 Setting Up Option Switches
DIS 1
SEG 1 SEG 2 SEG 3 SEG 4
DIS 2
KEY Dispaly
FunctionNumberof press times
1
2
3
4
Use the K1 only for heat pump models.
K1(Displayed on SEG 3, 4)
Adding refrigerant at heating mode
Test operation at heating mode
End
-
K2(Displayed on SEG 3, 4)
Adding refrigerant atcooling mode
Test operation at cooling mode
Pump Down for recovery of refrigerant
End
K3(Displayed on SEG 3, 4)
Reset
-
-
-
K4(Displayed on SEG 3, 4)
Displays data
-
-
-
Summary of KEY functions
K2
CHECK MODE
DISPLAYMODE
RESET
K4
K1 K3
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21Samsung Electronics
Control Specification & Troubleshooting
5-1-4 Wired remote controller display specification at error occurring
Communication error In caseof no signal for 2 minutes
Display RemarksDescription
Overlapping error mark displays error in order, the next error is displayed at error correction.
Indoor unit related error
Outdoor related error(Outdoor related error displayskey error)
Communication error when there is no signal from outdoor unit to wiredremote controller.
Communication error when there is no answer from wired remote controller to indoor unit.
Indoor unit float switch error
Indoor unit room temperature sensor open/short error
Indoor unit evaporator temperature sensor open/short error
EEPROM error
EEPROM OPTION error
Fan starting error (1-way cassette model only)
Outdoor unit error display when indoor unit stop • Outdoor unit sensor error (temperature and pressure)• Restart failure error• Self diagnose of Electronic valve opening /closing 6 times • Reverse phase, E2(Communication error)
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Samsung Electronics22
When error occurs in air conditioner, error code is displayed on indoor unit display lamp and outdoor unit.
5-2-1 Indoor unit LED error diagnosis
Error detection and reoperation
If error occurs during the operation, badness is indicated by LED flickering and all operation is stopped except LED. When reoperating by remote controller and switch determine the error mode after normal operation.
Indoor unit LED lamp display at error detecting
5-2 Troubleshooting
Power Reset
Error of peripherals option set-up
EEPROM ERROR
EEPROM OPTION ERROR
Error of the indoor unit sensorApplied indoor unit error display(Indoor unit display only during the
operation)
Applied indoor unit error display(Indoor unit display only during the
operation)
The whole indoor unit error displayOutdoor unit separated Display(Indoor unit display only during the
operation)
Indoor unit door(Display is unrelated with operation)
Indoor unit display
Error of the outdoor unit pipe sensor
Freeze prevention control(Errors occur during 6th detection)
Communication error(Transmitter, wired remote control)
Communication error between indoor units
LED lamp
Error mode Remark
: Flickering : Off
Error of the indoor unit pipe sensor
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23Samsung Electronics
Control Specification & Troubleshooting
5-2-2 Outdoor unit display specification at error occurring
Compressor stop due to frozen evaporator of indoor unit(every times)
Error of momentary power failure(Disappears when theunit is Off/On)
During the defrosting operation(Heat pump model only)
Outdoor temperature SENSOR ERROR(OPEN/SHORT)
Condensor temperature SENSOR ERROR(OPEN/SHORT)
Discharge temperature SENSOR ERROR(OPEN/SHORT)
After tracking completion, system down due to communication error
To mismatch the indoor unit number communicated with setting indoor unit after 5 times tracking completion
Floating switch error from indoor unit
Indoor unit room temperature sensor open/short error
Indoor unit evaporator temperature sensor open/short error
Outdoor unit electronic valve opening error(Detecting over 1 time)
Outdoor unit electronic valve closing error(Detecting over I time)
(below -5˚C at cooling), (over 30˚C at heating)
Outdoor sensor related error 1- The whole outdoor unit sensor
error detection should be doneduring the indoor unit operationonly.(But ,transferring to com-munication data by sensing isallowed at any time.)
Outdoor protection controlrelated error
Indoor/Outdoor unit self diagnosis related
Communication and indoor uniterror related
Operation status display
Display
DIS1 DIS2Description RemarksNo
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Display priority order at overlapping error : E1→E4→P0 →P1 →P5 →P6 →t1 →t2 →t3 →tu →to →G4 →G5 →E3→qx →rx →K1, 2, 3, 4, 5- If several indoor unit report the same error, the fast address is priority.
or
flickering
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Samsung Electronics24
5-3 Sequence for trouble diagnosis
5-3-1 Outdoor temperature sensor(OPEN/SHORT)
Reoperationafter connection to
connector PCB
No
Outdoor unit thermistorself badness (exchange)
No
PCB and sensor are normal. To perform the test
operation by use of K2
Outdoor unit display
Indoor unit display
How to determine
Reason of error
Er → t1 (Outdoor temperature sensor OPEN/SHORT error)
(Operation) (Timer) (Airflow) (Filter)
Disconnection and short of outdoor temperature sensor
Disconnection or leak of applied sensor
Yes
Yes
Yes
To check the out temperature sensor is normal or not by use of
out data display part To check the temperature data is
normal or not after pressing K4 3 times.At this time, is occurred the difference
between the out temperature and data?
Reoperation after PCB exchange
Is not separated the outtemperature sensor connector from
PCB?(CN41)
At this time, Is not largelydeviate the resistance value from side
table value?
Temperature(˚C)
70
60
50
40
30
20
10
0
-10
Resistance(kΩ)
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
Yes
To measure the resistance value between two terminals after
separating the out temperature sensorconnector from PCB
No
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25Samsung Electronics
Control Specification & Troubleshooting
5-3-2 Outdoor heat exchanger temperature sensor error(OPEN/SHORT)
Temperature(˚C)
70
60
50
40
30
20
10
0
-10
Resistance(kΩ)
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
Reoperationafter connection to
connector PCB
Outdoor heat exchanger temperature self badness
(exchange)
PCB and sensor arenormal.
Yes
Yes
Yes
To check the out temperature sensor is normal or not by use of
out data display part To check the temperature data is
normal or not after pressing K4 2 times.At this time, is occurred the difference
between the out temperature and data?
Reoperation after PCB exchange
Is not separated the out heat exchanger temperature sensor
connector from PCB?(CN41)
At this time, Is not largelydeviate the resistance value from side
table value?
Yes
To measure the resistance value between two terminals after separating
the out heat exchanger temperaturesensor connector from PCB
Outdoor unit display
Indoor unit display
How to determine
Reason of error
Er → t2 (Outdoor heat exchanger temperature sensor error(OPEN/SHORT)
(Operation) (Timer) (Airflow) (Filter)
Disconnection and short of outdoor heat exchanger temperature sensor
Disconnection or leak of Applied sensor
No
No
No
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Samsung Electronics26
Control Specification & Troubleshooting
5-3-3 Outdoor discharge temperature sensor error(OPEN/SHORT)
Re-operationafter connection to
connector PCB
Outdoor heat exchanger temperature self badness
(exchange)
PCB and sensor are normal.To perform the test
operation by use of K2
Yes
Yes
Yes
To check the out temperature sensor is normal or not by use of out
data display part To check the temperature data is
normal or not after pressing K4 1 times.At this time, is occurred the difference
between the out temperature and data?
Re-operation after PCB exchange
Is not separated the outdoordischarge temperature sensor connector
from PCB?(CN42)
At this time, Is not largelydeviate the resistance value from
side table value?
Yes
To measure the resistance valuebetween two terminals after separating
the outdoor discharge temperaturesensor connector from PCB
Temperature(˚C)
130
120
100
80
60
25
20
10
0
-10
Resistance(kΩ)
8.9
11.2
18.5
32
59
200
242
362
553
Outdoor unit display
Indoor unit display
How to determine
Reason of error
Er → t3 (Outdoor discharge temperature sensor OPEN/SHORT error)
(Operation) (Timer) (Airflow) (Filter)
Disconnection and short of outdoor heat exchanger temperature sensor
Disconnection or leak of Applied sensor
No
No
No
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27Samsung Electronics
Control Specification & Troubleshooting
5-3-4 Communication error during the operation
No
If address is no fault,to exchange the indoor unit PCB after
communication line check.
To exchange PCB after checkingthe outdoor unit communication line
and connector
No
Yes
Yes
To measure the 2 lines of outdoor sideby scope after removing the
communication line connecting fromoutdoor unit to indoor unit.
After connecting again the communicationline connecting from outdoor unit to indoor unit,
to remove the communicationconnector on indoor unit PCB, and find the
indoor unit preventing communicationthrough connecting the communication
connectors each by each, and then exchangethe indoor unit PCB after line check.
To check the display afterpressing the reset key on outdoor PCB
When tracking, is there any indoor answer from display part?
At this time, is the voltagebetween lines spherical wave over DC ±0.7V
like below figure?
+0.7V
-0.7V
Good
Bad
Multi type
After 2 minutes, to check if PCB addresssetting of indoor unit displayed th communication error among indoor units isoverlapped or not. (If the indoor unit address is overlapped, thecommunication error is occurred.)- In this case, the communication error is
occurred to over two indoor units setwrong.
Outdoor unit display
Indoor unit display
Reason of error
Er → E1 (Communication error during the operation)
(Operation) (Timer) (Airflow) (Filter)
Disconnection and short of outdoor heat exchanger temperature sensor
Disconnection or leak of Applied sensor
Disconnectionand short of
communication lines
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Samsung Electronics28
Control Specification & Troubleshooting
5-3-5 Communication error between indoor and outdoor after initial power input.
No
After setting the indoor unit installation setting number switch correctly, Re-perform thetracking by pressing the reset key K3 of
outdoor unit PCB
If the indoor unit number installed is one, set theoutdoor unit switch forward to "0", "1" "0" and "1" spell the connection of an indoor unit.
No
Yes
Yes
Yes
To press the reset key K3 of outdoor unitPCB and check the display to check the number of indoor units answering to the
tracking
After connecting again the communication lineconnecting from outdoor unit to indoor unit,
to check this communication is reverse or not,and if there is no fault, to find the indoor unit
preventing communication through connectingindoor units each by each, and then
exchange the indoor unit PCB after line check
To check the setting value of indoor unit installation number setting
switch of outdoor PCB and actual indoor unitinstallation numbers
To measure the 2 lines of outdoor unit side byuse of scope after removing the communicationline connecting from outdoor unit to indoor unit
Is equal indoor unit actualinstallation number and installation
number setting switch?
At this time, is the voltagebetween lines spherical wave over
DC ±0.7V ?
When tracking, is there any indoor answer from display part?
If address is no fault, to exchange the indoor unit PCB after
communication line check.
Multi type
After 2 minutes, to check if PCB address settingof indoor unit displayed the communication erroramong indoor units is overlapped or not . (If the indoor unit address is overlapped, thecommunication error is occurred.)- In this case, the communication error is
occurred to over two indoor units set wrong
Outdoor unit display
Indoor unit display
How to determine
Reason of error
Er → E2 (Tracking error)
(Operation) (Timer) (Airflow) (Filter)
Mismatching the communicating indoor unit and setting switch indoor numbers When outdoor tracking
Communication error between the indoor unit and outdoor unit, and installation number switch
setting miss
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29Samsung Electronics
Control Specification & Troubleshooting
No
Refer to the drain pump option in the next page.
5-3-6 Indoor floating switching error
No
No
No
No
NoTo exchange the indoor unit PCB
To exchange the drain pump
To exchange the drain pump
To exchange the indoor unit PCB
Yes
Yes
Yes
Yes
Yes
Yes
Yes
To reset the indoor unit power and check the drain pump operation
Normal operation
Normal operation
To determine the floating switchbad To reset the indoor unit
power after exchange
Is the resistance value ∞when measuring the resistance value
of two terminal after taking out the floatingswitch connector connected to indoor
unit PCB? (Open status)
Is much the water of drain pan ?
Is the indoor uniterror occurred cassette type?
Is operated the drain pump?
Is lowing the water level?
Is the same error occurred?
Is the terminal voltageof drain pump PCB about
AC 220V?
To re-assembly the floating switch connector and perform the reset of
outdoor power(Required the reset ofindoor unit power)
Note : E3 error should be released whenindoor unit power is reset.
Outdoor unit display
Indoor unit display
How to determine
Reason of error
Er → E3 (Indoor floating switching error )
(Operation) (Timer) (Airflow) (Filter)
The status continues over 1 minute that indoor unit floating switch is opened.
The rising of water level of drain pan due to the disorder of indoor unit drain pump,
the badness of detection sensor
No
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Samsung Electronics30
14
7
43
37
29
4
23
18
6
41
40
36
34
32
1
38
19
20
16
24
42
13
15
3930 26
28
27
3
25
33
44
11 1222
21
17
8
31
35
2
5
9 10
45
45-6
45-1
45-2
45-8
45-7
45-345-4
45-5
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