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LG GR-P257 User Manual

LG GR-P257
128 pages
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CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
MODEL: GR-L257NI
COLOR: TITANIUM
http://biz.lgservice.com
Ref. No.
GR-GR-L257BTBA
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LG GR-P257 Specifications

General IconGeneral
Noise Level39 dB
Smart DiagnosisYes
Inverter Linear CompressorYes
DisplayLED
ColorStainless Steel

Summary

WARNINGS AND PRECAUTIONS FOR SAFETY

SPECIFICATIONS

PARTS IDENTIFICATION

HOW TO INSTALL REFRIGERATOR

Adjust Door Height of Refrigerator

Guide on adjusting refrigerator door height for proper leveling and alignment.

Install Water Pipe

Instructions and parts list for installing the refrigerator's water supply pipe.

Use Bottled Water

Instructions for using bottled water with an external pump for the refrigerator.

Water Filter Installation

Details on the fixation and cleaning of the external water filter.

Control Icemaker Water Supply

Procedures to check and adjust the water supply quantity for the icemaker.

MICOM FUNCTION

Control Panel and Basic Functions

Monitor panel, temperature selection, and basic function descriptions.

Advanced Functions

Ice maker, dispenser, express freezer, and special zone operations.

System Control and Diagnostics

Fan control, alarms, frost removal, failure diagnosis, and test functions.

Dispenser and Water System

Operation of dispenser and water supply functions.

EXPLANATION FOR MICOM CIRCUIT

Power and Basic Circuits

Power, oscillation, reset, and basic circuit explanations.

Input/Output and Control Circuits

Load, dispenser, door sensing, and temperature sensing circuits.

Model Specific Circuit Variations

Circuit differences for GR-C/B series models and other specific functions.

Component Specific Circuits

Switch entry, option designation, motor, and fan motor circuits.

Compensation and Sensor Circuits

Temperature compensation, weak/over-cold circuits, and sensor characteristics.

PWB, Display, and Communication Circuits

PWB diagrams, display circuits, and inter-PCB communication.

ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD

Ice Maker Working Principles

How the ice maker functions from power input to ice ejection.

Dispenser Working Principles

How the water and ice dispenser functions operate.

Ice Maker Functions and Control

Detailed ice maker functions, including initial control and water supply.

Ice Ejection and Test Operations

Control functions related to ice ejection and test procedures.

Ice Maker Troubleshooting

Troubleshooting guide for common ice maker issues and failure diagnosis.

Ice Maker Circuit Details

Detailed circuit diagram for the ice maker unit.

CIRCUIT DIAGRAM

Basic Circuit Diagrams

Basic circuit diagrams including main PWB assembly.

Deluxe Circuit Diagrams

Deluxe circuit diagrams including main PWB assembly.

TROUBLE DIAGNOSIS

General Troubleshooting

General steps for diagnosing and resolving common refrigerator issues.

Cooling System Issues

Diagnosis for no cooling, weak refrigeration, and temperature problems.

Defrosting and Icing Problems

Troubleshooting defrosting failures and icing issues in compartments.

Sound and Odor Diagnosis

Identifying and resolving refrigerator sounds and odors.

Micom and Electrical Faults

Troubleshooting Micom, display, and electrical faults.

Heavy Repair Procedures

Standards and precautions for heavy repair tasks like refrigerant handling.

HOW TO DEAL WITH CLAIMS

Sound Issues

Diagnosis and explanation of various sounds from the refrigerator.

Temperature Symptom Measures

Measures to address temperature-related symptoms like weak refrigeration.

Odor and Frost Management

Diagnosis and management of odors and frost formation.

Other Common Issues

Other issues like hot case, door liner holes, electric bills, and condensation.

HOW TO DISASSEMBLE AND ASSEMBLE

Door Assembly

Steps for disassembling and assembling the refrigerator and freezer doors.

Handle and Fan Components

Procedure for removing and installing the handle, shroud, and grille fan.

Icemaker and Dispenser Assembly

Disassembly and assembly of the icemaker and dispenser units.

Water Tank, Home Bar, and Related Parts

Information on water tank, home bar, and dispenser related parts.

EXPLODED VIEW

Freezer Door Components

Exploded view of the freezer door for specific models.

Refrigerator Door Components

Exploded view of the refrigerator door for specific models.

Compartment Components

Exploded view of the freezer and refrigerator compartment components.

System Component Views

Exploded views of ice/water, machine, and dispenser system components.

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