LG LFC20770SW User Manual

CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
REFRIGERATOR
SERVICE MANUAL
MODELS:
LFC20770SB
LFC20770SW
LFC20770ST
LFC20786SW
LFC20786ST
LFC20786SB

LG LFC20770SW Specifications

General

Ice Maker	Yes
Water Dispenser	Yes
Energy Star Rated/Certified	Yes
Height	69.8 in.
Color/Door Finish	White
Type	French Door Refrigerator

Summary

2. PARTS IDENTIFICATION

3. DISASSEMBLY

3-1 FAN AND FAN MOTOR

3-2 DEFROST CONTROL ASSEMBLY

3-7 DOOR DISASSEMBLY

3-10 HOW TO REMOVE PULL OUT DRAWER

4. ADJUSTMENT

4-1 COMPRESSOR

5. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER

5-1 OPERATION PRINCIPLE

5-2 ICEMAKER FUNCTIONS

6. CIRCUIT DIAGRAM

7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM

7-1 FUNCTION

7-2 PCB FUNCTION

8. TROUBLESHOOTING

8-1. COMPRESSOR AND ELECTRIC COMPONENTS

Troubleshooting steps for compressor and related electric parts.

8-2 e-PTC AND OLP

Troubleshooting for e-PTC starter and OLP issues.

8-3 OTHER ELECTRICAL COMPONENTS

8-4 SERVICE DIAGNOSIS CHART

8-5 REFRIGERATION CYCLE

8-5-1 Sealed System Diagnosis

8.7 Troubleshooting With Error Display

2) Abnormal Freezer Sensor (F)

Troubleshooting flow for abnormal freezer sensor errors.

3) Abnormal Refrigerator Sensor (R)

Troubleshooting flow for abnormal refrigerator sensor errors.

4) Abnormal Defrost Sensor (D)

Troubleshooting flow for abnormal defrost sensor errors.

5) Abnormal Defrost Sensor (RT)

Troubleshooting flow for abnormal RT defrost sensor errors.

6) Abnormal Ice Maker Sensor

Troubleshooting flow for abnormal ice maker sensor errors.

7) Abnormal Ice Maker Kit

Troubleshooting flow for abnormal ice maker kit errors.

8) Abnormal Defrosting Operation (dH)

Troubleshooting flow for abnormal defrosting operation errors.

9) Abnormal Freezer Fan Motor Operation (FF)

8.8 Troubleshooting Without Error Display

1) Ice maker doesn't making Ice Cubes.

2) Freezer LED Lamp not working

3) Refrigerator LED Lamp not working

4) Poor cooling in refrigerator section.

5) Over cooling in refrigerator section.

6) Poor cooling in Freezer section.

7) Over cooling in Freezer section.

8) Refrigerator apparently doesn't work.

10) Door Alarm never stops

9.EXPLODED VIEW