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LG LWC1264CGMM0 Service Manual
LG LWC1264CGMM0 Service Manual

LG LWC1264CGMM0 Service Manual

Window air conditioner

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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG LWC1264CGMM0
Owner's Manual
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LWC1264CGMM0
Find Your LG Air Conditioner Parts - Select From 2328 Models
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Summary of Contents for LG LWC1264CGMM0

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LWC1264CGMM0 Owner's Manual Shop genuine replacement parts for LG LWC1264CGMM0 Find Your LG Air Conditioner Parts - Select From 2328 Models -------- Manual continues below --------...
  • Page 2 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.
  • Page 3 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...
  • Page 4 Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the follow- ing indications.
  • Page 5 Safety Precautions Do not touch the discharging refrigerant gas during the repair work. The discharging refrigerant gas.The refrigerant gas can cause frostbite. Release the refrigerant gas completely at a well-ventilated place first. Otherwise, when the pipe is disconnected, refrigerant gas or refrigerating machine oil discharges and it Can cause injury.
  • Page 6 Safety Precautions Do not tilt the unit when removing panels. Otherwise, the water inside the unit can spill and wet floor. Do not use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen deficiency. Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
  • Page 7 Operation Operation Features • Designed for COOLING ONLY. • Built-in adjustable THERMOSTAT • Powerful and whispering cooling. • Washable one-touch filter • Slide-in and slide-out chassis for the simple instal- • Compact size lation and service. • Reliable and efficient rotary compressor •...
  • Page 8 Operation 2. Heat Pump Model • HEATER LAMP When the unit sets heating operation condition, the green lamp is lighted. COOLER WARMER When the frost settles on the heat exchanger of the outside, defrosting is made automatically and the green lamp is unlighted. The until it may hiss and the fan motor will stop for 1 to 10 minutes.
  • Page 9 Operation 3. Cooling and Heating Model with Remote Control and Touch Type DISPLAY REMOTE CONTROL POWER BUTTON Operation starts, when this button is pressed and stops when you press the button again. OPERATION MODE SELECTION BUTTON Select Cooling, Heating, or Fan mode with this button. ON/OFF TIMER BUTTON Set the time of starting and stopping operation.
  • Page 10 Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER CONDENSER COIL COIL CAPILLARY CAPILLARY TUBE MOTOR MOTOR TUBE COMPRESSOR COMPRESSOR BLOWER BLOWER EVAPORATOR COIL EVAPORATOR COIL : COOLING CYCLE : HEATING CYCLE Figure 32 is a brief description of the important components and their function in what is called the refrigeration system.
  • Page 11 Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit runs but poor cooling.
  • Page 12 Troubleshooting Guide Fails to Start Check of power source. Check circuit breaker and fuse. Check of control switch Gas leakage of feeler bulb setting. of thermostat Check of control switch. Compressor only fails to Fan only fails to start. start. Improper wiring.
  • Page 13 Troubleshooting Guide Electrical Parts Troubleshooting Guide LWC1264PAG/PAN/PCG, LWC1264QAG/QAS, LWC126CBHK0, LWC126CGMM0/CBMM1/LWC096CBMK0 Possible Trouble 1 The unit does not operate. Is the Trans input power • Check the Fuse. • Check the Fuse. AC 220/240V? • Check the wiring diagram. • Check the wiring diagram. •...
  • Page 14 Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is setting Temp. set lower than Room • Select the setting Temp. to lower Number. Temp.-0.5°C? Is the voltage No.11 Is the voltage N0.6 of Is the Unit for 3 minutes of IC01M 0V? IC01M DC 5V? delay?
  • Page 15 Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.2 or 3 or 4 • Exchange IC01M. of IC01M DC 5V? Is the voltage NO.13 or 14 or 15 • Exchange IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
  • Page 16 Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. Is the voltage of Battery • Exchange the battery. about over 2.3V? Is the voltage No.10 • Check the PCB pattern. of CN-DISP2 on Main PCB • Check the PCB pattern. Ass'y DC 5V? •...
  • Page 17 Troubleshooting Guide LWC1264PBG/PHG, LWC1264VBS/QBG Possible Trouble 1 The unit does not operate. • Check the Fuse. Is the Trans output power • Check the wiring diagram. AC 220V/240V? • Check the Main Is the Trans output power Is shorted the Trans. output? PCB pattern.
  • Page 18 Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is setting • Select the setting Temp. to lower Number. Temp. set lower than Room Temp.-0.5°C? Is the voltage No.10 Is the voltage N0.7 of Is the Unit for 3 minutes of IC7 0V? IC 7 DC 5V? delay?
  • Page 19 Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.2 or 3 • Exchange IC1. of IC7 DC 5V? Is the voltage NO.14 or 15 • Exchange IC7. of IC7 0V? • Check the RY-High or RY-Low. •...
  • Page 20 Troubleshooting Guide Possible Trouble 6 It displays abnormally on display PCB Ass'y. • Exchange IC6. Is the IC6 all right? • Connect connector Is the connection of to CN-DISP1 exactly. CN-DISP1 all right? Does the TR1, • Exchange TR1, TR2, TR3 operate normally TR2, TR3.
  • Page 21 Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING MINIMUM MAXIMUM 220~240±10% 198V 264V COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if necessary. Power supply cord Check voltage to rotary switch. If none, check power supply cord.
  • Page 22 Troubleshooting Guide COMPLAINT CAUSE REMEDY Thermostat Compressor will not run, Check the position of knob If not at the coldest set- but fan motor runs. ting, advance the knob to this setting and restart unit. Check continuity of the thermostat. Replace thermo- stat if circuit is open.
  • Page 23 JANUARY, 2007 P/NO : MFL37825901...