LG GR-431SCA - User Manual

CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
MODEL: GR-391SCA
REFRIGERATOR
SERVICE MANUAL
Ref. No.
GR-432SCA
GR-431SCA
GR-482SCA
COLOR: SUPER WHITE
http://biz.lgservice.com

Summary

SAFETY PRECAUTIONS

SERVICING PRECAUTIONS

Precautions to take before and during servicing the refrigerator.

1. SPECIFICATIONS

2. PARTS IDENTIFICATION

3. DISASSEMBLY

3-1 DOOR

Procedures for removing the freezer and refrigerator doors.

3-2 DOOR SWITCH

Steps to remove the door switch from the refrigerator.

3-4 FAN AND FAN MOTOR

Instructions for removing the fan and fan motor assembly.

3-3 THERMISTOR

Guide to removing the Thermistor from the control box assembly.

3-5 DEF CONTROL ASSY

Steps for removing the defrost control assembly.

3-6 LAMP

Procedures for replacing the freezer and refrigerator room lamps.

3-7 CONTROL BOX-R

How to remove the control box assembly.

3-8 REPLACEMENT OF DOOR OPENING TYPE

Instructions for converting the refrigerator door opening type.

4. ADJUSTMENT

4-1 COMPRESSOR

Explains the role and composition of the compressor.

4-2 PTC-STARTER

Details the composition and role of the PTC starter.

4-3 OLP (OVER LOAD PROTECTOR)

Defines and explains the role of the Over Load Protector.

5. CIRCUIT DIAGRAM

6. TROUBLESHOOTING

6-1 COMPRESSOR AND ELECTRIC COMPONENTS

Troubleshooting steps for compressor and electrical components.

6-2 PTC AND OLP

Troubleshooting procedure for PTC and OLP components.

6-3 ANOTHER ELECTRIC COMPONENTS

Troubleshooting for other electrical components affecting cooling.

6-4 SERVICE DIAGNOSIS CHART

A chart for diagnosing various refrigerator complaints and their remedies.

6-5 REFRIGERATING CYCLE

Troubleshooting chart for issues related to the refrigerating cycle.

7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM

7-1 FUNCTION

Explanation of the refrigerator's temperature control function.

7-1-2 DEFROSTING

Details the defrosting process and conditions.

7-1-3 SEQUENTIAL OPERATION OF ELECTRIC COMPONENTS

Describes the sequential start-up of electrical components.

7-1-4 CONTROL OF DOUBLE COOLING FAN IN THE REFRIGERATOR COMPARTMENT

Explains the operation of the refrigerator compartment cooling fan.

7-1-5 ERROR DIAGNOSTIC MODE

Information on error codes and diagnostic modes.

7-2 PCB FUNCTION

Overview of the Printed Circuit Board functions.

7-3 RESISTANCE SPECIFICATION OF SENSOR

Provides resistance specifications for temperature sensors.

7-4 TROUBLE SHOOTING

General troubleshooting guide for various refrigerator issues.

7-5 MAIN PWB ASSEMBLY AND PARTS LIST

7-5-1 MAIN PWB ASSEMBLY

Diagram of the main Printed Circuit Board assembly.

7-5-2 REPLACEMENT PARTS LIST

List of replaceable parts with their specifications and makers.

7-6 PWB DIAGRAM

8. EXPLODED VIEW

LG GR-431SCA Specifications

General

Brand	LG
Model	GR-431SCA
Category	Refrigerator
Language	English