WEBSITE E-MAIL http://biz.LGservice.com http://www.LGEservice.com/techsup.html Room Air Conditioner SERVICE MANUAL MODEL: LWJ0561ACG LWJ0561ACP/AAG CAUTION - BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. - ONLY FOR AUTHORIZED SERVICE PERSONNEL.
CONTENTS 1. PREFACE .................................................................................................................................................. 3 1.1 FEATURES ................................................................................................................................................... 3 1.2 SPECIFICATIONS ........................................................................................................................................ 3 1.
1. PREFACE This service manual provides various service information, including the mechanical and electrical parts, etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit. 1.
1.3 LOCATIONS OF CONTROLS Off Operation Operation Off High Fan FAN High Cool Low Fan 0 COO L ( 0 ) : Turns air conditioner off. High Fan ( ) : High speed fan operation without cooling. Low Fan ) : Low speed fan operation without cooling. ( Low Cool Thermostat Thermostat 5 COOLER 4 5 6 4 3 7 2 8 1 9 6 7 3 8 2 1 9 High Cool ( ) : Cooling with high speed fan operation. Low Cool ( ) : Cooling with low speed fan operation.
2. DISASSEMBLY INSTRUCTIONS 2.1 MECHANICAL PARTS 2.1.1 FRONT GRILLE Figure 1 1. Disconnect the unit from the power source. 2. Remove the two knobs by pulling them off. Using a screwdriver, remove the screw that secures the front grille to control board. (See Figure 1) 3. Push the front grille up from the bottom. Pull the top of the front grille away from the cabinet as the top tabs lift out of their slots. (See Figure 2) 4.
2.2 AIR HANDLING PARTS Figure 6 2.2.1 AIR GUIDE UPPER 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove the control board. (Refer to Section 2.1.3) 5. Remove 2 screws that secure the brace to air guide upper and shroud. (See Figure 6) 6. Remove 2 screws that secure the air guide upper to air guide lower. (See Figure 6) 7. Lift air guide upper upward. 8.
2.2.3 MOTOR Figure 10 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove the control board. (Refer to Section 2.1.3) 5. Remove the air guide upper. (Refer to Section 2.2.1) 6. Remove the compressor, turbo fan, fan and shroud. (Refer to Section 2.2.2) 7. Remove 2 screws that secure the motor to the motor. (See Figure 10) 8. Remove the motor. 9. Re-install by referring to the procedures above. 2.2.
2.3.3 CAPACITOR 1. Remove the cabinet. (Refer to Section 2.1.2) 2. Remove the control board. (Refer to Section 2.1.3) 3. Discharge the capacitor by placing a 20 KΩ resistor across the capacitor terminals. 4. Remove the screw which fastens the capacitor clamp. 5. Remove all the leads of capacitor terminals. 6. Re-install the components by referring to the removal procedure above. (See Figure 15) Figure 15 2.3.4 THERMOSTAT 1. Remove the cabinet. (Refer to Section 2.1.2) 2. Remove the control board.
wise. This will keep oil from foaming and being drawn into the vacuum pump. 2.4.2 EVAPORATOR 1. Remove the cabinet. (Refer to section 2.1.2) 2. Discharge the refrigerant by using a refrigerant recovery system. 3. Remove the air guide upper. (Refer to Section 2.2.1) 4. After discharging the refrigerant completely, unbraze the interconnecting tube at the evaporator connections. 5. Remove the evaporator. 6. Re-install by referring to the procedures above. 6-3.
Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve.
3. INSTALLATION This air conditioner is designed with a buttondown chassis so that it can be installed simply in a window. 3-1. SELECT THE BEST LOCATION 1. To prevent vibration and noise, make sure the unit is installed securely and firmly. 2. Install the unit where the sunlight does not shine directly on the unit. 3.
3.4 HOW TO INSTALL • WHEN USING GASKET A 1 2 2 F B RIGHT SIDE C HORIZONTAL G LINE 3 D E Figure 24 Figure 25 1. WINDOW (A - WIDTH, B - HEIGHT) 2. GASKET 3. WALL A B C D E F G 487mm (19 3/16") 324mm (12 3/4") 30mm (1 1/16") 0~25mm (0~1") OVER 240mm (9 15/32") 5~10mm (3/16"~3/8") -5~5mm (-3/16"~3/16") 4. TROUBLE SHOOTING GUIDE 4.
4.2 PIPING SYSTEM CONDENSER COILS FAN MOTOR CAPILLARY TUBE BLOWER EVAPORATOR COILS Following is a brief description of the important components and their function in what is called the refrigeration system. Reference should be made to Figure 26 to follow the refrigerating cycle and the flow of the refrigerant in the cooling cycle.
4.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused from an electrical defect. The other is Ineffective Air Conditioning caused from a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective. Ineffective Cooling Check cold air circulation for smooth flow. Check outdoor coil (heat exchanger) and fan operation. Dirty indoor coil (heat exchanger) Check gas leakage.
Fails to Start Check of power source. Check of circuit breaker and fuse. Check of control switch setting. Gas leakage of feeler bulb of thermostat. Check control switch. Compressor fails only to start. Fan only fails to start. Drop of power voltage. Improper thermostat setting Defect of compressor capacitor. Loose terminal connection Capacitor check. Improper wiring Improper wiring. Defect of fan motor capacitor. Irregular motor resistance (Ω) Irregular motor insulation (Ω) Replacement.
ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 220V~240V 198V 264V COMPLAINT Fan motor will not run. CAUSE REMEDY No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to rotary switch. If none, check power supply cord. Replace cord if circuit is open. Rotary switch Check switch continuity. Refer to wiring diagram for terminal identification. Replace switch if defective. Wire disconnected or connection loose Connect wire.
COMPLAINT Fan motor noise. Compressor will not run, fan motor runs. CAUSE REMEDY Fan If cracked, out of balance, or partially missing, replace it. Blower If cracked, out of balance, or partially missing, replace it. Loose set screw Tighten it. Worn bearings 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. Voltage Check voltage. See the limits on the preceding page.
COMPLAINT Compressor cycles on overload Insufficient cooling. Excessive noise. CAUSE REMEDY Fan motor If not running, determine the cause. Replace if required. Condenser air flow restriction Remove the cabinet, inspect 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 re-assembling.
5. SCHEMATIC DIAGRAM 5-1. CIRCUIT DIAGRAM • MODEL : LWJ0561ACG POWER INPUT 4 BK(BR) (Plain) ROTARY SWITCH 1 2 H BK RD 3 4 L 5 6 7 8 WH(BL) (Ribbed) GN(GN/YL) BK RD OR(BR) M 2 MOTOR YL 1 CAPACITOR YL OR(BR) R 3 BR COMP. S C BR BK RD BL OLP THERMOSTAT F 6 C H 7 5 WIRING DIAGRAM REF.
• MODEL : LWJ0561ACP/AAG 1 4 2 6 3 7 5 REF.
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7. SERVICE PARTS LIST LOCATION No. DESCRIPTION PART No.
P/NO:3828A20118B April, 2002 Printed in Korea
