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1. Warning: Prior to repair, disconnect thepower cord from the circuit breaker.
2. Use proper parts: Use only exact replace-ment parts. (Also, we recommend replacingparts rather than repairing them.)
3. Use the proper tools: Use the proper toolsand test equipment, and know how to usethem. Using defective tools or test equip-ment may cause problems later-intermittentcontact, for example.
4. Power Cord: Prior to repair, check thepower cord and replace it if necessary.
5. Avoid using an extension cord, and avoidtapping into a power cord. This practicemay result in malfunction or fire.
6. After completing repairs and reassembly,check the insulation resistance. Procedure: Prior to applying power, mea-sure the resistance between the power cordand the ground terminal. The resistancemust be greater than 30 megaohms.
7. Make sure that the grounds are adequate.
8. Make sure that the installation conditionsare satisfactory. Relocate the unit if necessary.
9. Keep children away from the unit while it isbeing repaired.
10. Be sure to clean the unit and its surround-ing area.
To select the 5 way function with the remote control, press the 5 waybutton one or more times until the desired mode is selected.Each time you press the 5 way button.
Each 5 way indicator on the indoor unit comes on in order.
Each time you press this button, FAN SPEED is changed in the following order.
Press until the appearance. the sleep timer can be used when you are cooling or heating your room to switch the air conditioner offautomatically after a perriod of six hours.
Temp. down button. To decrease the temperature by the pressingthe temperature button.
FUNCTION OF KEY
3-1-1 Name & Function of Key in remote controller
(DOWN)
Power On/Off button to start and stop airconditioner or timer set up.
Press until the appearance. the air condition cools or heatsthe room as quickly as possible. after 30minutes, the air, the airconditioner is reset automatically to the previous mode.
NAMED OF KEY
(UP)
NO
1
2
3
4
5
6
7
8
9
Adjust air flow vertically.
Each time you press this buttonMode is changed in the following order
: Auto Mode : Fan Only
: Cool Mode : Heat Mode
: Dry Mode
Temp. up button. To increase the temperature by the pressingthe temperature button.
The ON Timer enables you to switch on the air conditioner automaticallyafter a given period of time that is from 30 minutes to 24 hours.To cancel, press the (Set/Cancel) button.
The Off Timer enables you to switch off the air conditioner automaticallyafter a given period of time that is from 30 minutes to 24 hours.To cancel, press the (Set/Cancel) button.
DB81-00181A(4)-1 3/6/11 3:23 PM Page 3-1
Samsung Electronics3-2
Operating Instructions and Installation
1. AUTO MODE : In this mode, operationmode(COOL, HEAT) is selected automati-cally by the room temperature of initialoperation.
∆T= -1°C, -2°C, 0°C+1°C+2°C∆T is controlled by setting temperature
up/down key of remote controller
2. COOL MODE : The unit operates accordingto the difference between the setting androom temperature. (18°C~30°C)
3. HEAT MODE : The unit operates accordingto the difference between the setting androom temperature.(16°C~30°C) *Prevention against cold wind : For about3~5 minutes after initial operation, thermocontrol or “de-ice”, the indoor fan willeither not operate or operate very slowly,then switch to the selected fan speed. Thisperiod is to allow the indoor unit's heat-exchanger to prewarm before emittingwarm air.*High temperature release function : Theoutdoor unit for and compressor ON/OFFcontrol for safety operation, when the over-heat is heat exchanger of indoor unit.
*De-ice : Deicing operation is controlled byindoor unit's heat exchanger temperatureand accumulating time of compressor'soperation.De-ice ends by sensing of the processingtime by de-ice Condition.
4. DRY MODE : Has 3 states, each determinedby room temperature.The unit operates in DRY mode.*Compressor ON/OFF Time is controlledcompulsorily(can not set up the fan speed,always breeze).
*Protective function : Low temperaturerelease. (Prevention against freeze)
5. TURBO MODE : This mode is available inAUTO, COOL, HEAT, DRY, FAN MODE.When this button is pressed at first, the airconditioner is operated “powerful” state for30 minutes regardless of the set tempera-ture, room temperature.When this button is pressed again, or whenthe operating time is 30 minutes, turbooperation mode is canceled and returned tothe previous mode.*But, if you press the TURBO button in DRYor FAN mode that is changed with AUTOmode automatically.
6. SLEEP MODE : Sleep mode is availableonly in COOL or HEAT mode.The operation will stop after 6 hours.*In COOL mode : The setting temperatureis automatically raised by 1°C each 1hourWhen the temperature has been raised bytotal of 2°C, that temperature is main-tained.
*In HEAT mode : The setting temperatureis automatically droped by 1°C each1hour.When the temperature has been droped bytotal of 2°C, that temperature is main-tained.
7. FAN SPEED : Manual (3 step), Auto (4 step)Fan speed automatically varies dependingon both the difference between setting andthe room temperature.
Room Temp
Tr≥ 21°C+∆T
21°C +∆T>Tr
Operation Type
Cool Operation (Set Temp:24˚C+∆T)
Heat Operation (Set Temp:22˚C+∆T)
3-1-1 Name & Function of Key in remote controller
DB81-00181A(4)-1 3/6/11 3:23 PM Page 3-2
Operating Instructions and Installation
3-3Samsung Electronics
8. COMPULSORY OPERATION : For operating the air conditioner withoutthe remote controller.*AUTO : The operating is the same func-tion that AUTO MODE in the remote con-troller. And each time you press the buttonthe 5WAY function is changed as follow.STD NATURE POWER SAVING SILENCE POWER OFFEach time you press This button, 5WAYfunction is changed in the following orderSTD(standard) NATURE POWER(High-speed) Saving(Power-Saving) SILENCE POWER OFF
STD(standard)( ) : General operationMode
NATURE( ) : The unit is operatedaccording to health pattern control
POWER( ) : The unit is operated in powerful state
SAVING( ) : The unit is operated inpower saving state
SILENCE( ) : The unit is operatedquietly
Each mode has Auto, Cool and SLEEP oper-ation designed in advance.
9. SWING : BLADE-H is rotated vertically bythe stepping motor.*Swing Set : Press the button under theremote control is displayed on LCD theand the blades move up and down. If theone more time press the button, bladeslocation is stop.
10. 24-Hour ON/OFF Real Setting Timer. : Theair conditioner is turned ON at a specifiedtime using .OFF TIMER : The air Conditioner is turnedOFF at a specified time using .*ON TIMER : Only timer LED lights on.*OFF TIMER : Both timer and operationLED lights on.
11. SELF Diagnosis
12. BUZZER SOUND : Whenever the ON/OFFbutton is pressed or whenever changeoccurs to the condition which is set up orselect, the compulsory operation mode,buzzer is sounded "beep".
Indoor unit room temperature sensorerror(open or short)
Check Point
LED DISPLAY
TIMER STD NATURE POWER SAVING SILENCE
LED:blinking
: LED off
Indoor unit heat exchanger temperaturesensor error(open or short)
Indoor fan malfunction
EEPROM error
Option error(option wasn’t set up or option data error)
DB81-00181A(4)-1 3/6/11 3:23 PM Page 3-3
MEMO
Samsung Electronics3-4
DB81-00181A(4)-1 3/6/11 3:23 PM Page 3-4
4-1Samsung Electronics
4. Disassembly and Reassembly
4-1 Indoor Unit
Stop operation of the air conditioner and remove the power cord before repairing the unit.
No Parts Procedure Remark
1 Front Grille 1) Stop the air conditioner operation and blockthe main power.
2) Separate tape of front panel upper.
3) Contract the second finger to the left, andright handle and pull to open the inlet grille.
4) Take the left and right filter out.
5) Loosen one of the right fixing screw andseparate the terminal cover.
6) Loosen three fixing screws of front grille.
7) Pull the upper left and right of dischargesoftly for the outside cover to be pulled out.
8) Pull softly the lower part of discharge andpush it up.
Caution;Assemble the front panel and fix the hooks of left and right.
*Taking off the deodorizing filter.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-1
Disassembly and Reassembly
Samsung Electronics4-2
No Parts Procedure Remark
2
3
4
Electrical Parts(Main PCB)
Ass’y Tray Drain.
Heat Exchanger
1) Do “1”above.
2) Take all the connector of PCB upper side out.(Inclusion Power cord)
3) Separate the outdoor unit connection wirefrom the terminal block.
4) If pulling the Main PCB up. it will be takenout.
1) Do “1”, “2”, above.Separate the drain hose from the extensiondrain hose.
2) Pull tray drain out from the back body.
1) Do “1” and “2”, “3”, above.
2) Loosen two fixing earth screws of right side.
3) Separate the connection pipe.
4) Separate the holder pipe at the rearside.
5) Loosen the three fixing screws of right andleft side.
6) Lifting the heat exchanger up a little to pushthe up side for separation from the indoorunit.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-2
Disassembly and Reassembly
4-3Samsung Electronics
No Parts Procedure Remark
5 Fan Motor andCross Fan
1) Do “1” “2” ”3” “4”, above.
2) Loosen the fixing two screws and separatethe motor holder.
3) Loosen the fixing screw of fan motor.(By use of M3 wrench)
4) Separate the fan motor from the fan.
5) Separate the fan from the left holder bearing.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-3
Samsung Electronics4-4
4-2 Outdoor Unit
• UQ12 5(6)M
No Parts Procedure Remark
1 Common Work 1) Loosen the fixing screw and separate theHandle-Cabi RH.
2) Separate the connection wire from theterminal block.
3) Loosen 6 fixing screws and separate theupper cabinet.
4) Loosen the fixing screw of Ass'y E-part.
5) Loosen 5 fixing screws and separate the sidecabinet.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-4
Disassembly and Reassembly
4-5Samsung Electronics
No Parts Procedure Remark
2 Fan-Motor 1) Loosen 4 fixing screw of the Guard-Fan.
2) Remove the nut flange (Turn to the right toremove, as it is a left hand screw)
3) Separate the fan.
4) Loosen four fixing screws to separate themotor.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-5
Disassembly and Reassembly
Samsung Electronics4-6
No Parts Procedure Remark
1
2
Common Work
Fan and Motor
1) Loosen the fixing two screws and separatethe cover E-parts.
2) Separate the connection wire from theterminal block.
3) Loosen five fixing screws and separate thecabi Upper.
4) Loosen two fixing screws of Ass'y E-part.
5) Loosen nine fixing screws and separate thecabi side.
1) Do “1”, above.2) Loosen four screws and seperaate Guard Fan
from front cabinet.
• SH09Z 5(6)X• UQ09 5(6)M
• SH07Z 5(6)X• UQ07 5(6)M
SH09Z 5(6)DXUQ09 5(6)M
SH07Z 5(6)DXUQ07 5(6)M
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-6
Disassembly and Reassembly
4-7Samsung Electronics
No Parts Procedure Remark
3
4
Heat Exchanger
Compressor
2) Remove the nut flange (Turn to the right toremove, as it is a left hand screw)
3) Separate the fan.
4) Loosen four fixing screws to separate themotor.
1) Do “1”, 2 above.2) Loosen two fixing screws of left and right
side.3) Disassemble the inlet and outlet pipe by
welding. 4) Separate the heat exchanger.
1) Do “1”, above.2) Loosen the nut on the terminal cover and
open the terminal cover.3) Disassemble the inlet and outlet pipe of com-
pressor by welding.4) Disassemble the inlet and outlet pipe of con-
denser by welding.5) Loosen the three bolts of the lower part.6) Separate the compressor.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-7
Disassembly and Reassembly
Samsung Electronics4-8
• SH07Z 7(8)X/SH09Z 7(8)X• UQ07 7(8)M /UQ09 7(8)M
No Parts Procedure Remark
1 Common Work 1) Loosen the fixing tow screws and separatethe COVER TERMINAL.
2) Loosen the fixing two screws and seperatethe cover control.
3) Separate the connection wire from theterminal block.
4) Loosen six fixing screws and separate thecabi front.
5) Loosen the one fixing screw of Ass'y E-part.
6) Loosen 12 fixing screws and separate thecabi side.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-8
4-9Samsung Electronics
Disassembly and Reassembly
No Parts Procedure Remark
2
3
4
Fan and Motor
Heat Exchanger
Compressor
1) Do “1” above.
2) Remove the nut flange (Turn to the right toremove, as it is a left hand screw)
3) Separate the fan.
4) Loosen Four fixing screws to separate themotor.
5) Loosen two fixing screws and seperate themotor bracket from the base.
1) Do “1”,“2” above.2) Loosen two fixing screws of left and right
side.3) Disassemble the inlet and outlet pipe by
welding. 4) Separate the heat exchanger.
1) Do “1”, “2”, “3” above.2) Open the terminal cover of compressor and
unscrew the connection terminal.3) Disassemble the inlet and outlet pipe of
compressor by welding.4) Loosen the three bolts of the lower part.5) Separate the compressor.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-9
Disassembly and Reassembly
Samsung Electronics4-10
No Parts Procedure Remark
1
2
Common Work
Fan and Motor
1) Loosen the fixing two screws and separatethe cover E-parts.
2) Separate the connection wire from the terminal block.
3) Loosen five fixing screws and separate thecabi Upper.
4) Loosen two fixing screws of Ass'y E-part.
5) Loosen seven fixing screws and separate thecabi side.
1) Do “1”, above.2) Losen four serews and seperaate Guard Fan
from front cabinet.
• UQ12 9(0)ME• SH12Z 9(0)X
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-10
Disassembly and Reassembly
4-11Samsung Electronics
No Parts Procedure Remark
3
4
Heat Exchanger
Compressor
2) Remove the nut flange (Turn to the right toremove, as it is a left hand screw)
3) Separate the fan.
4) Loosen four fixing screws to separate themotor.
1) Do “1”, “2” above.2) Loosen two fixing screws of left and right
side.3) Disassemble the inlet and outlet pipe by
welding. 4) Separate the heat exchanger.
1) Do “1” above.2) Loosen the nut on the terminal cover and
open the terminal cover.3) Disassemble the inlet and outlet pipe of
compressor by welding.4) Disassemble the inlet and outlet pipe of
condenser by welding.5) Loosen the three bolts of the lower part.6) Separate the compressor.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-11
Disassembly and Reassembly
Samsung Electronics4-12
• SH12Z A(B)X• UQ12 A(B)ME
No Parts Procedure Remark
1 Common Work 1) Loosen the fixing one screws and separatethe COVER TERMINAL.
2) Loosen the fixing one screws and seperatethe cover control.
3) Separate the connection wire from theterminal block.
4) Loosen 13 fixing screws and separate thecabi front.
5) Loosen the one fixing screw of Ass'y E-part.
6) Loosen 4 fixing screws and separate thecabi side.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-12
Disassembly and Reassembly
4-13Samsung Electronics
No Parts Procedure Remark
2
3
4
Fan and Motor
Heat Exchanger
Compressor
1) Do “1”, above.
2) Remove the nut flange (Turn to the right toremove, as it is a left hand screw)
3) Separate the fan.
4) Loosen four fixing screws to separate themotor.
5) Loosen five fixing screws and seperate themotor bracket from the base.
1) Do “1”, “2” above.2) Loosen two fixing screws of left and right
side.3) Disassemble the inlet and outlet pipe by
welding. 4) Separate the heat exchanger.
1) Do “1”, “2”, “3” above.2) Open the terminal cover of compressor and
unscrew the connection terminal.3) Disassemble the inlet and outlet pipe of
compressor by welding.4) Loosen the three bolts of the lower part.5) Separate the compressor.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-13
MEMO
Samsung Electronics4-14
DB81-00181A(4)-1 3/6/11 3:24 PM Page 4-14
5-1Samsung Electronics
1) The input voltage should be rating voltage ±10% range. The airconditioner may not operate properly if the voltage is out of this range.
2) Is the link cable linking the indoor unit and the outdoor unit linked properly?The indoor unit and the outdoor unit shall be linked by 5 cables. Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.Otherwise the airconditioner may not operate properly.
3) When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the airconditioner.
4) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis details on thedisplay panel.
5. Troubleshooting
5-1 Items to be checked first
NO Operation of air conditioner
1 The STD operation indication LED blinks when apower plug of the indoor unit is plugged in for the first time.
2 In a COOL operation mode, the compressor does notoperate at a room temperature higher than the settingtemperature that the INDOOR FAN should operate.In a HEAT operation mode, the compressor does notoperate at a room temperature lower than the settingtemperature that indoor fan should operate.
3 Fan speed setting is not allowed in AUTO or DRY mode.
4 Compressor stops operation intermittently in DRY mode.
5 Compressor of the outdoor unit is operating although it isturned off in a HEAT mode.
6 Timer LED only of the indoor unit lights up and theair conditioner does not operate.
7 The compressor and indoor fan stop intermittently in HEATmode.
8 Indoor fan and outdoor fan stop operation intermittently in a HEAT mode.
9 The compressor stops intermittently in a COOL mode or DRY mode, and fan speed of the indoor unit decreases.
It indicates power is on. The LED stops blinking if the operationON/OFF button on the remote control unit is pushed.
In happens after a delay of 3 minutes when the compressor is reoper-ated. The same phenomenon occurs when a power is on.As a phenomenon that the compressor is reoperated after a delay of 3 minutes, the indoor fan is adjusted automatically with reference to a temperature of the air blew
The speed of the indoor fan is set to LL in DRY mode.Fan speed is 5 steps is selected automatically in AUTO mode.
Compressor operation is controlled automatically in DRY modedepending on the room temperature and humidity.
When the unit is turned off while de-ice is activated, the compressorcontinues operation for up to 9 minutes (maximum) until the deice iscompleted.
Timer is being activated and the unit is in ready mode.The unit operates normally if the timer operation is cancelled.
The compressor and indoor fan stop intermittently if room temperatureexceeds a setting temperature in order to protect the compressor fromoverheated air in a HEAT mode.
The compressor operates in a reverse cycle to remove exterior ice in aHEAT mode, and indoor fan and outdoor fan do not operate intermit-tently for within 20% of the total heater operation
The compressor stops intermittently or the fan speed of the indoor unitdecreases to prevent inside/outside air frozen depending on theinside/outside air temperature.
Explanation
NO Display
1 STD LED blinking (1Hz)
2 TIMER LED blinking (1Hz)
3 STD and TIMER LED blinking (1Hz)
4 NATURE LED blinking (1Hz)
Restore from power failure (input initial power)
Indoor unit Room sensor Error (open or short)
Indoor unit heat exchanger temperature sensor Error (open or short)
Indoor fan malfunctioning (for spead is Below 450rpm)
Self Diagnosis
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-1
Samsung Electronics5-2
5-2 Fault Diagnosis by Symptom
5-2-1 No Power (completely dead)-Initial diagnosis
1) Checklist :(1) Is input voltage normal? (2) Is AC power linked correctly?(3) Is output voltage of DC regulator IC KA78L05 (IC02) normal? (4.5VDC-5.5VDC)
2) Troubleshooting procedure
Replace PCBdisplay
Is DC voltage of PCBdisplay normal?
Remove power cord and plug in again in approx. 5 seconds
Is operation lamp blinking?
Does operation start whenON/OFF button on the remote
controller unit pushed?
Is transmission display of the remote controller unit blinking?
Is "beep"sound heard from the mainunit?
Is DC voltage of the PCB modulenormal?
Are voltages of #33 (compressor), #36(4 way valve) and #34 (outdoor fan)
of the micom normal? 5VDC Is voltage of #32 (indoor fan) of the
micom normal?
Is voltage at #10 terminal of the Micom normal?0VDC
Is voltage at #9 terminal of the Micom normal?5VDC
Is rating voltage ±10% rangeapplied to the primary side(~,~)
of the “BD71”
•Check linkage betweenpower cord and
terminal tap•Check fuse
Is 325VDC appear in thesecondary side (+, -)
of “BD71”
Replace SMPS PARTS
YES
NOYES
NO
YES
YES
YES
NO
YES
YES
YES
DC5V
10ms
250ns
NO
NO
OK
YES
YES
YES
YES
NO
NO
YESNormal
Refer to remote control unit fault diagnosis
Replace PCBmodule.
Is output voltage of ICO2 normal?
Check connectionscompressor and
outdoor FANand indoor fan.
Are voltages at RY71(Compressor) and RY72(Outdoor FAN) normal?DC12V Is voltage at SS71(indoor fan)
Replace RY71 and RY72
and SS71
NO
NO
NO
Is voltage output terminal ofPC814(PC02) normal?
Replace ICO2Check PCB pattern.Replace main PCB.
Replace PC814(pc02)
Replacemicom
Is voltage at #3 terminal of the micomnormal?
Are voltage at #11 and #12 of themicom normal?
NO
NONO
YESNO
NO
NOYES
OK
Is operation normal?
Replace resonator (X301)
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-2
Troubleshooting
5-3Samsung Electronics
5-2-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)
1) Checklist :(1) Is the indoor unit fan motor properly connected with the connector (CN72)?(2) Is the AC voltage correct?(3) Is HALL IC in indoor fan motor properly connected with the connector (CN42)?(4) Is the running capacitor (CR71) properly connected with PCB board?
2) Troubleshooting procedure
After unplugging out the power cord shouldbe reconnected within five seconds.
Does the STD lamp(Green) blink?
Does the Solid State Relay(SS71) workproperly?
Is the supply voltage of the fanmotor sufficient?
Test rod location
PCB CN72 Condition
Fan operate about AC 180V
Normalvoltage
pin #3 and #5
YES
YES
YES
NO
NO
NO
Check as in the procedure “NO power parts” Refer tppage 5-2.
Microcomputer is out of order.
PCB isout of order.
PCB should bereplaced.
Replace MFC
Fan motorshould be replaced.
Fan motoris out of order.
MF-C is out of orderYES
-
Test rod location
+
SS71- SS71- 12V
NormalVoltage
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-3
Troubleshooting
Samsung Electronics5-4
5-2-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)
1) Checklist :(1) Is input voltage normal?(2) Is the set temperature of the remote control higher than room temperature in COOL mode?(3) Is the POWER IN connector (CN71) linked correctly?(4) Is the outdoor unit properly connected with the TERMINAL BLOCK connector((N1), 1)?
2) Troubleshooting procedure
After unplugging out the power cord should be reconnected within five seconds.
Does the STD lamp blink
YES
YES
NO
NO
NO
NO
YES
YES
Outdoor unit isout of order.
Power relay isout of order
Power relay should bereplaced.
PCB should bechecked.
Microcomputer is out of order.
PCB should be checked.
Room temperature sensor isout of order
Check as in the procedure "No Power parts"Refer to page 5-2.
Is the room sensor normal register?
10°C 20°C 30°C
17.96kΩ 12.09kΩ 8.3kΩ
Does the timer lamp blink during operation ?
Is the power relay RY71 operated by adjusting the roomtemperature?
Is rating voltage ±10% range applied relay between Terminal blockNO(N1) and No. 1
Test rod location Normal
+ - Condition Voltage
IC4 Pin No.33 GND RY71 ON DC 4.8V
#
!
!
@
#
@
NO
YES
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-4
Troubleshooting
5-5Samsung Electronics
5-2-4 When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)
1) Checklist :(1) Is input voltage normal? (2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?
2) Troubleshooting procedure
Remove power cord and plug in again in approx. 5 seconds.
Is STD lamp blinking?
Does operation start when swing button of the remote control unit pushed?
Voltage at pin #58-#61 of micom (ICO4) change?(Squarewave)
Volatge at pin #13 ~ #16 of IC06 ULN2003AFW) change?(Squarewave)
UP/DOWN louver motor is faulty.
Driver IC06 (ULN2003AFW) is faulty.
Micom (IC04) is faulty.
Normal
Check as in the procedure "No Power parts". Refer to page 5-2.
5-2-5 In the mode, When there is no warm air current. Check this first;
(1) Is the set temperature of Remote Control lower than room temperature in Heat mode?(2) Is the Indoor PCB properly connected with the CN71 connector?
After training on, the heating operation shouldstart in five minutes.
Is the number #36 of Micom (IC04) DC 5.0 V?
Is the number checking #12 of IC06 (ULN2003AFW) LOW?
Is the voltage between CN71 #3 and CN71 #5 rating voltage ±10% range
Abnormal 4way valve of Outdoor Unit.or connecting Cable
4 way valve should be replacedor connecting Cable Check.
NO
YES
YES
YES
NO
NO
NO
YESNormal
Abnormal Micom
Abnormal IC06
Abnormal RY73
PCB should be replaced.
YES
YES
NO
NO
YES
NO
NO
YES
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-5
Troubleshooting
Samsung Electronics5-6
5-2-6 If Operation By Remote Control Unit Is Impossible. (Initial Diagnosis)
1) Troubleshooting procedure
Remove power cord and plug in again approx. 5 Seconds
Is operation lamp blinking? Check as in the procedure “NO Powerparts”. Refer to page 5-2.
Normal
Replace battery.
LCD is faulty.
Replace button.
Micom is faulty.
Receiver module is faulty.
Q601(C4375Y) or Q602(C1623Y) is faulty.
IR LED(CL-1L5EU) is faulty.
“ “ sound heard from the indoor unit when ON/OFF button on the remote control unit pushed?
Voltage of battery less than 2.5V (Remote Control Unit)?
LCD display status of REMOCON normal?
Voltage at PIN #30 of Remocon Micom change?
Voltage at collecter of Q601 or Q602 change?
Voltage at pin #26 of micom (IC04) change (INDOOR UNIT)?
Micom (IC04) is faulty.
Transmission display lamp ( ) blinking whenON/OFF button on the remote control unit pushed?
YES
NO
NO
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-6
5-7Samsung Electronics
5-3 PCB Inspection
5-3-1 Cautions for Part Replacement
5-3-2 Procedure
The parts should be replaced in the following procedure.
1. The human body carries much staticelectricity. Before touching a part for repair,replacement or the similar purpose, be sureto touch a grounded metallic portion byhand to let the static electricity go throughthe metallic portion to the earth.Especially when handling any microcomputer or IC, carefully remove such staticelectricity before touching them.
2. When repairing any part on a work bench,be sure to place an insulative sheet on thebench and always keep the sheet surfaceneat without any metal fragments. If anysuch fragment touches a part, a secondarytrouble will possibly be caused in the part.
3. Before replacing any parts, be sure to turnoff the power supply. If such replacement isdone with the power supply kept on, anelectric shock, short circuit or destruction ofa part may result.
4. During replacement or repair of a part,carefully handle it : The printed circuitboard has fine lead wires (jumper wires) andglass-made parts (diode) on its substrate. So if a circuit board is roughly handled, suchlead wires and parts will be easily broken ordamaged by bending or shock.
5. When soldering the lead wires of any newpart, be sure to polish them using an emerypaper or the like before solding them.Since the lead wires of any new part arecovered with an oxide film, solder cannotadhere to the lead wires if not polished.
6. When soldering any part, care should beexercised not to apply any high-wattagesoldering iron to the part for a long time.Some parts are of so low a heat resistancethat they may be broken or have theproperties changed if a soldering iron is soapplied (Otherwise, the pattern maypossibly be separated and raised).
7. The heat of the soldering iron should betransfered to the entire object to be soldered.If the solder pieces are not well fused due toinsufficient transfer of the heat from thesoldering iron, no satisfactory electricalcontinuity can be assured even if thesoldered objects appear well connected toeach other.
8. The solder used should be limited to aminimum. If excessive solder is used, it willcause inter-pattern contact, which maycause malfunction of the circuit.
Check for any faulty part.
The repair is completed.
Check the operation of the new part.
Replace it with a new part.
Detach the faulty part.
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-7
Troubleshooting
Samsung Electronics5-8
5-3-3 Detailed Procedure
No.
1
2
3
Malfunction
Pull out the power plug from
the AC terminal and confirm
the fuse on the PCB assembly
Turn the power on.
Set the TURBO mode
Checking point (symptoms)
1. Is the broken(open)?
Voltage check
1. AC voltage at BD71(~,~)?
: rating voltage ± 10% range
2. DC voltage at BD71(+,-)?
: about 325[v] ± 10%
3. DC voltage at IC02
: IN-GND DC12[v]
: OUT-GND DC5[v]
4. Voltage waveform at Q201
: collector-GND squarewave
Voltage check
1. check voltage of IC06
(pin#10,pin#8)
: relay on 0.7[v]
: relay off 12[v]
2. Voltage at terminal block
((N1) -1) rating voltage
Causes
Voltage over
Indoor unit fan
motor short-circuit
SMPS circuit is faulty
SMPS circuit is faulty
PC02, R202-R205
SMPS circuit is faulty
IC06 is faulty
RY71 is faulty
∆∆
∆∆
∆∆
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-8
5-9Samsung Electronics
5-4 Fault Diagnosis of Major Parts
Parts
Temp.Sensor
Heat ex. Sensor
Indoor Fan Motor
Outdoor Fan Motor
Stepping Motor
(UP/DOWN swing motor)
Diagnosis
Measure resistance with a tester.
Normal
Abnormal ∞, OΩ … open or short
Measure resistance between terminals (CN72) with a tester
Normal At ambient temperature (10°C ~ 30°C)
Abnormal ∞, OΩ … open or short
Measure the voltage between ground and signal wire of the fan motor
Normal
Abnormal Abnormal if voltage does not change from 0V to 5V.
Normal At ambient temperature (10°C ~ 30°C)
Abnormal ∞, OΩ … open or short
Measure resistance between red wire and each terminal.
Normal Approx. 380Ω at ambient temperature (20°C ~30°C)
Abnormal ∞, OΩ … open or short
Ambient temperature 15°C 20°C 25°C 30°C 35°C 40°C
Resistance of 14.68 12.09 10 8.31 6.94 5.83thermistor[KΩ]
***7(*8)** ***5(*6)(*9)(*0)**
between Resistance
Black, Red 304±10% 360±10% Main
Black, White 289±10% 257±10% Sub
between Voltage
Gray, Orange 0.5V~4.5V
Yellow, Orange 5V
between Voltage
Red, Blue 410±10% Main
Red, Yellow 325±10% Sub
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-9
Samsung Electronics5-10
• It is necessary to set up option code after replacing the main-PCB as a service parts.Make sure that you can set up the option of code the remote controller after you replace the mainPBA otherwise, the unit won’t be working properly and all LED lamps on display will be flickering.
Step 1 : Preparing the remocon to main PCB option set1st Remove the battery from the remocon.2nd Press the temperature raise/down button simultaneously
and insert the battery again.3rd Make sure the remocon display shown as .
Step 2 : Second stage preparation of the remocon option set.
The Method for Setting up the model option with remocon
Note ; In case the wrong letter has been selected, continue to press the button until the correct letter appears.
1st If the first stage number “ ” appears on the display, proceed to the second stage.2nd Every time the ! and & button, “ ” and “ ” each continue to appear.3rd Whenever pressing the @, #, $, %, ^, *, (, ), 1, 2 button, the number increase from
0~9(0123456789) and A, b, C, d, E, F each time.
! If the first number is , it is correct otherwise press until appear.
@ When pressing the button ~ appear on the display,select one of them.
# When pressing the button ~ appear on the display,select one of them.
$ When pressing the button ~ appear on the display,select one of them.
% When pressing the button ~ appear on the display,select one of them.
^ When pressing the button ~ appear on the display,select one of them.
5-5 Set up the Model option
DB81-00181A(4)-1 3/6/11 3:25 PM Page 5-10
Troubleshooting
5-11Samsung Electronics
! If the first number is , it is correct otherwise press until appear.
@ When pressing the button ~ appear on the display,select one of them.
# When pressing the button ~ appear on the display,select one of them.
$ When pressing the button ~ appear on the display,select one of them.
% When pressing the button ~ appear on the display,select one of them.
^ When pressing the button ~ appear on the display,select one of them.
Step 3 : Reconfirming option set after completion
(in case of ex. 014A25-1700b7)
After pressing selector for the mode, the display shown as .After pressing selector for the mode, the display shown as .
Step 4 : Pressing the ON/OFF button ( )When pressing the operation ON/OFF key with the direction of remote controller for unit,the sound “Ding” or “Diriring” is heard and the first LED lamp on the left side is flicker-ing at the same time, then the input of option is completed. (If the diriring sound isn’theard, 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 key with the direction of remote controller for set.
• Error Mode
1st If all lamps of indoor unit are flickering, Plug out and plug in again and pressing ON/OFF key to retry.
2nd If the unit is not working properly or all lamps are continuously flickering after setting the option code, see ifthe correct option code is set up for it’s model.
DB81-00181A(4)-1 3/6/11 3:25 PM Page 5-11
Troubleshooting
Samsung Electronics5-12
<Table of the option code>
MODEL
AQ12 5MB
AQ12 6MB
AQ12 5ME
AQ12 6ME
AQ09 5MESH09Z 5
AQ09 6MESH09Z 6
AQ09 5MEDSH09Z 5D
AQ09 6MEDSH09Z 6D
AQ07 5ME / AQ07 5MEDSH07Z 5 / SH07Z 5D
AQ07 6ME / AQ07 6MEDSH07Z 6 / SH07Z 6D
AQ09 7MESH09Z 7
AQ09 8MESH09Z 8
AQ07 7MESH07Z 7
AQ07 8MESH07Z 8
AQ12 9MESH12Z 9
AQ12 0MESH12Z 0
AQ12 A(B)MESH12Z A(B)X
OPTION CODE
017725-17021d
007725-17021d
017626-17021d
007626-17021d
016A25-1700d9
006A25-1700d9
016024-1700EA
006024-1700EA
014A25-1700b7
004A25-1700b7
016825-1700d9
006825-1700d9
014825-170067
004825-170067
017d25-17021d
007d25-17021d
007227-17023F
DB81-00181A(4)-1 3/6/11 3:25 PM Page 5-12
6. Exploded Views and Parts List
6-1 Indoor Unit
17
16
14
22
9
7
21
3
4
5
6
19
228
12
24
13-4
13-313-2
13
13-111
10
2
1
15
18-1
18-5
18-4
18 18-6
18-6-1
18-2
18-3
23
20
Samsung Electronics 6-1
You can search for the updated part codenumber through the ITSELF.URL : http://itself.sec.samsung.co.kr