Service Manual
Page 1
http://biz.lgservice.com Window Air Conditioner SVC MANUAL(General) MODEL : Window CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
http://biz.lgservice.com Window Air Conditioner SVC MANUAL(General) MODEL : Window CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
Service Manual
Page 2
Air Conditioner Service Manual CONTENTS Safety Precautions ...3 Operation ...6 Features ...6 Control Locations Function of Controls 6 Troubleshooting Guide...9 Piping System ...9 Troubleshooting Guide...10 Electrical Parts Troubleshooting Guide 12 Room Air Conditioner Voltage Limits 20 2 Window Air Conditioner
Air Conditioner Service Manual CONTENTS Safety Precautions ...3 Operation ...6 Features ...6 Control Locations Function of Controls 6 Troubleshooting Guide...9 Piping System ...9 Troubleshooting Guide...10 Electrical Parts Troubleshooting Guide 12 Room Air Conditioner Voltage Limits 20 2 Window Air Conditioner
Service Manual
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... conductor connected to a fire, poisonous gas generates. Otherwise there is risk of electric shock or fire. Be sure to earth the air conditioner with wet hands. Do not use a defective or underrated circuit breaker. When removing the front panel or cabinet, execute short-circuit... and discharge between high voltage capacitor terminals. Improper or loose connections can cause burns. 4 Window Air Conditioner Do not turn the air-conditioner ON or OFF by hand when taking out. Otherwise, working on the breaker under condition that there is a risk ...
... conductor connected to a fire, poisonous gas generates. Otherwise there is risk of electric shock or fire. Be sure to earth the air conditioner with wet hands. Do not use a defective or underrated circuit breaker. When removing the front panel or cabinet, execute short-circuit... and discharge between high voltage capacitor terminals. Improper or loose connections can cause burns. 4 Window Air Conditioner Do not turn the air-conditioner ON or OFF by hand when taking out. Otherwise, working on the breaker under condition that there is a risk ...
Service Manual
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...( ) : Permits the low fan speed operation without cooling. Select a higher number for average conditions. • OPERATION Off ( 0 ) : Turns the air conditioner off. LOW COOL ( ) : Permits cooling with the low fan speed operation. 5 4 6 3 7 Off Med High Fan Cool 2 8 1 ... from 0 the unit when first switching to the desired position. When a fresh air is exhausted. • THERMOSTAT CLOSE VENT OPEN Thermostat will disappear quickly. 6 Window Air Conditioner Operation Operation Features • Designed for COOLING ONLY. • Powerful and whispering ...
...( ) : Permits the low fan speed operation without cooling. Select a higher number for average conditions. • OPERATION Off ( 0 ) : Turns the air conditioner off. LOW COOL ( ) : Permits cooling with the low fan speed operation. 5 4 6 3 7 Off Med High Fan Cool 2 8 1 ... from 0 the unit when first switching to the desired position. When a fresh air is exhausted. • THERMOSTAT CLOSE VENT OPEN Thermostat will disappear quickly. 6 Window Air Conditioner Operation Operation Features • Designed for COOLING ONLY. • Powerful and whispering ...
Service Manual
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...control counterclockwise. • OPERATION OFF ( LOW FAN ( LOW COOL ( HIGH COOL ( LOW HEAT ( HIGH HEAT ( ) : Turns the air conditioner off. ) : Permits the low fan speed opera- Operation COOLER WARMER HEAT 0 COOL HEATER THERMOSTAT OPERATION (TYPE1) Warmer Cooler Thermostat Heater Operation...too cool, turn the thermostat control clockwise. The thermostat automatically controls cooling or heating, but the fan runs continuously whenever the air conditioner is unlighted. tion without cooling (or heating). ) : Permits cooling with the low fan speed operation. ) : Permits cooling...
...control counterclockwise. • OPERATION OFF ( LOW FAN ( LOW COOL ( HIGH COOL ( LOW HEAT ( HIGH HEAT ( ) : Turns the air conditioner off. ) : Permits the low fan speed opera- Operation COOLER WARMER HEAT 0 COOL HEATER THERMOSTAT OPERATION (TYPE1) Warmer Cooler Thermostat Heater Operation...too cool, turn the thermostat control clockwise. The thermostat automatically controls cooling or heating, but the fan runs continuously whenever the air conditioner is unlighted. tion without cooling (or heating). ) : Permits cooling with the low fan speed operation. ) : Permits cooling...
Service Manual
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The timer is pressed and stops when you press the button again. 8 Window Air Conditioner FAN SPEED SELECTOR Select the fan speed. The room temperature will be adjusted by 1˚C 30min., and by 2˚C 1 hour later. 6 SIGNAL RECEIVER 7 AUTO SWING ...
The timer is pressed and stops when you press the button again. 8 Window Air Conditioner FAN SPEED SELECTOR Select the fan speed. The room temperature will be adjusted by 1˚C 30min., and by 2˚C 1 hour later. 6 SIGNAL RECEIVER 7 AUTO SWING ...
Service Manual
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...Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in refrigeration circuit. 10 Window Air Conditioner Satisfactory operation with temperature difference of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Malfunction of refrigerant charged. Check... clogging in the refrigeration circuit and improper application. Ineffective Cooling Check cold air circulation for smooth flow. Check gas leakage. Adjusting of compressor. Obstruction at air outlet Correct above trouble Check outdoor coil (heat exchanger) & the fan ...
...Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in refrigeration circuit. 10 Window Air Conditioner Satisfactory operation with temperature difference of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Malfunction of refrigerant charged. Check... clogging in the refrigeration circuit and improper application. Ineffective Cooling Check cold air circulation for smooth flow. Check gas leakage. Adjusting of compressor. Obstruction at air outlet Correct above trouble Check outdoor coil (heat exchanger) & the fan ...
Service Manual
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.../QAS, LWC126CBHK0, LWC126CGMM0/CBMM1/LWC096CBMK0 Possible Trouble 1 The unit does not operate. output? YES Exchange Main PCB Ass'y. • Check the PCB pattern. 12 Window Air Conditioner YES NO • Check the Main Is shorted the Trans. YES Is output Voltage of IC01D NO DC 12V? YES • Exchange the Trans. •...
.../QAS, LWC126CBHK0, LWC126CGMM0/CBMM1/LWC096CBMK0 Possible Trouble 1 The unit does not operate. output? YES Exchange Main PCB Ass'y. • Check the PCB pattern. 12 Window Air Conditioner YES NO • Check the Main Is shorted the Trans. YES Is output Voltage of IC01D NO DC 12V? YES • Exchange the Trans. •...
Service Manual
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... 15 NO of Main PCB Ass'y DC 5V? Possible Trouble 5 The function of IC01M DC 5V? Is the Knob of Main & Display PCB. 14 Window Air Conditioner Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.2 or 3 or 4 NO of Energy Saver does not operate.
... 15 NO of Main PCB Ass'y DC 5V? Possible Trouble 5 The function of IC01M DC 5V? Is the Knob of Main & Display PCB. 14 Window Air Conditioner Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.2 or 3 or 4 NO of Energy Saver does not operate.
Service Manual
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... power NO AC 220V/240V? YES Exchange Main PCB Ass'y. • Exchange IC4, C07. • Connect connector exactly. • Check the PCB pattern. 16 Window Air Conditioner YES • Check the Fuse. • Check the wiring diagram. YES Is output Voltage of IC3 NO DC 5V? YES Is shorted the Trans. output...
... power NO AC 220V/240V? YES Exchange Main PCB Ass'y. • Exchange IC4, C07. • Connect connector exactly. • Check the PCB pattern. 16 Window Air Conditioner YES • Check the Fuse. • Check the wiring diagram. YES Is output Voltage of IC3 NO DC 5V? YES Is shorted the Trans. output...
Service Manual
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...; Exchange Receiver Ass'y. • Exchange IC1. • Exchange IC7. • Exchange the battery. ••CChheecckkththeePPCCBBppaattteterrnn.. • Connect connector to CN-DISP2 exactly. 18 Window Air Conditioner YES • Check the RY-High or RY-Low. • Check the wiring diagram. YES Is the voltage NO.14 or 15 NO of CN...
...; Exchange Receiver Ass'y. • Exchange IC1. • Exchange IC7. • Exchange the battery. ••CChheecckkththeePPCCBBppaattteterrnn.. • Connect connector to CN-DISP2 exactly. 18 Window Air Conditioner YES • Check the RY-High or RY-Low. • Check the wiring diagram. YES Is the voltage NO.14 or 15 NO of CN...
Service Manual
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... loose Capacitor (Discharge capacitor before testing.) Will not rotate Revolves on overload. Replace cord if circuit is open. 20 Window Air Conditioner Check switch continuity. Replace switch if defective. Units using slinger ring for condenser fan must have 1/4 to 5/16 inch clearance...the fan motor with mounting screw(s). Replace the switch if circuit is open , or damaged. Test capacitor. Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING 220~240±10% MINIMUM 198V MAXIMUM 264V COMPLAINT Fan motor will not rotate, replace the ...
... loose Capacitor (Discharge capacitor before testing.) Will not rotate Revolves on overload. Replace cord if circuit is open. 20 Window Air Conditioner Check switch continuity. Replace switch if defective. Units using slinger ring for condenser fan must have 1/4 to 5/16 inch clearance...the fan motor with mounting screw(s). Replace the switch if circuit is open , or damaged. Test capacitor. Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING 220~240±10% MINIMUM 198V MAXIMUM 264V COMPLAINT Fan motor will not rotate, replace the ...