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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

Содержание L6004R

Страница 1: ...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 ...

Страница 2: ...e 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 ...

Страница 3: ...nts and circuit boards are at main potential when the equipment is connected to the power cables This volt age is extremely dangerous and may cause death or severe injury if come in con tact with it SAFETY PRECAUTIONS 1 When servicing the unit set the main SWITCH to OFF and remove the POWER SUPPLY cables 2 Observe the original lead dress If a short circuit is found replace all parts which have bee...

Страница 4: ...leaks during work execute ventilation If the refrigerant gas touches to a fire poisonous gas generates A case of leakage of the refriger ant and the closed room full with gas is dangerous because a shortage of oxy gen occurs Be sure to execute ventilation When removing the front panel or cabinet execute short circuit and discharge between high voltage capacitor terminals If discharge is not execut...

Страница 5: ...r If drainage is faulty the water to enter the room and wet floor Check to see if the power cable plug is not dirty or loose If the plug is dust or loose it can cause an electrical shock or fire Do not use a joined power cable or extension cable or share the same power outlet with other electrical appliances otherwise it can cause an electrical shock excessive heat generation or fire Do not insert...

Страница 6: ...ted by positioning the knob to the desired position The 5 or 6 position is a normal setting for average conditions Operation Operation Features CLOSE VENT OPEN 1 Thermostat Operation 2 3 4 9 8 7 6 5 Off Med Fan Low Fan High Cool Med Cool Low Cool 1 Thermostat Operation 2 3 4 9 8 7 6 5 Off Med Fan Low Fan High Cool Med Cool Low Cool 0 0 On Off Auto Swing CAUTION A slight heat odor may come from the...

Страница 7: ...es sary in accordance with your temperature prefer ence The thermostat automatically controls cooling or heating but the fan runs continuously whenever the air conditioner is in operation If the room is too warm turn the thermostat control clockwise If the room is too cool turn the themostat control counterclockwise OPERATION OFF Turns the air conditioner off LOW FAN Permits the low fan speed oper...

Страница 8: ...mer is set by 1 hour FAN SPEED SELECTOR Select the fan speed Cooling Model 3 steps High F3 Low F1 Med F2 High F3 Heating Model 2 steps High F2 Low F1 High F2 ROOM TEMPERATURE SETTING BUTTON Control the room temperature within a range of 16 C to 30 C The room temperature will be adjusted by 1 C 30min and by 2 C 1 hour later SIGNAL RECEIVER AUTO SWING The vertical louver swings horizontally by the a...

Страница 9: ... CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH SUCTION LINE COOL LOW PRESSURE VAPOR COOLED AIR COMPLETE LIQUID BOIL OFF POINT LIQUID PRESSURE DROP ROOM AIR HEAT LOAD VAPOR INLET HOT DISCHARGED AIR LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID REFRIGERANT LOW PRESSURE VAPOR ROOM AIR CONITIONER EVAPORATOR COILS CONDENSER COILS CYCLE OF REFRIGERATION CAPILLARY TUBE COMPRESSOR BLOWER EVAP...

Страница 10: ... fan operation Check gas leakage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air 44 50 F 7 10 C Check heat load increase Clean condenser Not on separate circuit Check inside gas pressure Adjusting of refrigerant charged Malfunction of compressor Replacement of compressor Check cold air circulation for smooth fl...

Страница 11: ...gular motor insulation Replacement of fan motor Regular but fails to start Replacement of compressor locking of rotor metal Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance Irregular motor insulation Replacement of compressor Motor damaged Drop of power voltage Capacitor check Replacement Compressor only fails to start Defect of compressor capacitor ...

Страница 12: ... Voltage of IC02D DC 5V Is the voltage No 20 of Micom DC 5V Exchange Main PCB Ass y Is the connection between Main and Display all right Is the reset circuit all right The No 16 of Micom is 5V Check the Fuse Check the wiring diagram Check the Main PCB pattern Exchange the Trans Exchange D02D D05D Exchange IC01D Exchange IC02D Exchange IC01A C02A Connect connector exactly Check the PCB pattern NO N...

Страница 13: ...emp 0 5 C Is the voltage No 11 of IC01M 0V Exchange IC01M Select the setting Temp to lower Number Wait 3 Minutes Is the Unit for 3 minutes delay Exchange MAIN PCB Ass y Is the voltage N0 6 of IC01M DC 5V Check the RY COMP Check the wiring Diagram NO NO NO YES YES YES YES Is the wire connection of RY COMP all right Check the RY COMP Connect LEAD Wire to RY COMP again NO YES NO ...

Страница 14: ...the voltage NO 2 or 3 or 4 of IC01M DC 5V Is the voltage NO 13 or 14 or 15 of IC01M 0V Check the RY Hi or RY Med or RY Lo Check the wiring diagram NO NO YES YES NO NO YES YES Is the Knob of SW1 set to left position Is the voltage No 1 of CN DISP1 of Main PCB Ass y DC 5V Reference to OWNER S MANUAL Set the Knob of SW1 to left position Check the SW1 Check the pattern of Main Display PCB ...

Страница 15: ...nge the display PCB Ass y Exchange IC01G Exchange Q12G Q13G Q14G Connect connector to CN DISP2 exactly Does the Q12G Q13G Q14G operate normally on main PCB Ass y Check the PCB pattern Is the voltage of Battery about over 2 3V Exchange Receiver Ass y Is the connection of CN DISP2 all right Is the voltage No 10 of CN DISP2 on Main PCB Ass y DC 5V Exchange the battery Check the PCB pattern Connect co...

Страница 16: ... of IC3 DC 5V Is the voltage No 20 of IC1 DC 5V Exchange Main PCB Ass y Is the connection between Main and Display all right Is the reset circuit all right The No 16 of IC1 is 5V Check the Fuse Check the wiring diagram Check the Main PCB pattern Exchange the Trans Exchange BD1 Exchange IC2 Exchange IC3 Exchange IC4 C07 Connect connector exactly Check the PCB pattern NO NO NO NO NO NO NO YES YES YE...

Страница 17: ...m Temp 0 5 C Is the voltage No 10 of IC7 0V Exchange IC7 Select the setting Temp to lower Number Wait 3 Minutes Is the Unit for 3 minutes delay Exchange MAIN PCB Ass y Is the voltage N0 7 of IC 7 DC 5V Check the RY COMP Check the wiring Diagram NO NO NO YES YES YES YES Is the wire connection of RY COMP all right Check the RY COMP Connect LEAD Wire to RY COMP again NO YES NO ...

Страница 18: ... 15 of IC7 0V Check the RY High or RY Low Check the wiring diagram NO NO YES YES Is the voltage of Battery about over 2 3V Exchange Receiver Ass y Is the connection of CN DISP2 all right Is the voltage No 7 of CN DISP2 on Main PCB Ass y DC 5V Exchange the battery Check the PCB pattern Connect connector to CN DISP2 exactly NO NO NO YES YES YES Possible Trouble 5 Remote controller does not operate ...

Страница 19: ...exactly Does the TR1 TR2 TR3 operate normally on main PCB Ass y NO NO YES YES Is the Knob of SW1 set to left position Is the voltage No 3 of CN DISP2 of Main PCB Ass y DC 5V Reference to OWNER S MANUAL Set the Knob of SW1 to left position Check the SW1 Check the pattern of Main Display PCB Possible Trouble 6 It displays abnormally on display PCB Ass y Possible Trouble 7 The function of Auto Restar...

Страница 20: ...otor Pay attention to any change from high speed to low speed If the speed does not change replace the motor If cracked out of balance or partially missing replace it If cracked out of balance or partially missing replace it Tighten it If knocking sounds continue when running or loose replace the motor If the motor hums or noise appears to be internal while running replace motor Check voltage If n...

Страница 21: ...ct the interior surface of the condenser if restricted clean carefully with a vacuum cleaner do not damage fins or brush Clean the interior base before reassembling If condenser fins are closed over a large area on the coil surface head pressures will increase causing the compressor to overload Straighten the fins or replace the coil Test capacitor Check the terminals If loose repair or replace Ch...

Страница 22: ...P NO MFL37825901 JANUARY 2007 ...

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