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LG WT4901C Series - User Manual

LG WT4901C Series
53 pages
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WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
CAUTION
MODEL : WT4901C*/WT4970C*
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LG WT4901C Series Specifications

General IconGeneral
TypeTop Load Washer
Energy Star CertifiedYes
Wash Programs/Cycles12
ColorWhite
Steam TechnologyYes
Washer Interior MaterialStainless Steel

Summary

SAFETY PRECAUTION!

1. SPECIFICATIONS

2. INSTALLATION INSTRUCTIONS

2-1. HOW TO ADJUST LEVEL

Guides on leveling the washing machine for proper installation and stability.

2-2. CONNECTING WATER SUPPLY HOSE

Instructions for safely connecting the water supply hoses to the tap and the machine.

2-3. CONNECT THE DRAIN HOSE

Procedures for correctly connecting the drain hose to ensure proper drainage.

3. OPERATING INSTRUCTION

3-1. IDENTIFICATION OF PARTS

Identifies and explains the function of various external and internal parts of the washing machine.

3-2. BEFORE STARTING TO WASH

Essential steps and checks before starting a wash cycle, including sorting and loading.

Using Water

Details on selecting water temperature and its impact on washing performance.

Using Detergent

Guidance on choosing and using the correct detergent and bleach for optimal cleaning.

Using the Dispenser Drawer

Instructions on how to properly load detergent, fabric softener, and additives into the dispenser.

Special Guide for Stain Removal

Provides a detailed guide and chart for effective removal of various common stains.

3-3. FUNCTION OF EACH BUTTON

Explains the purpose and operation of each control button on the washing machine panel.

3-4. WASHING PROGRAMS

A guide to the different wash cycles, recommended fabric types, and settings.

3-5. CARE AND MAINTENANCE

Recommended procedures for cleaning and maintaining the washing machine to ensure longevity.

4. SERVICE INFORMATION

4-1. DISASSEMBLY INSTRUCTION

Step-by-step guide for safely disassembling the washing machine for repair or part replacement.

Disassembly of Noise Filter, Power Cord, Inlet Valve, Pressure Switch, and Dispenser Housing

Detailed instructions for disassembling specific internal components of the washing machine.

Disassembly of Top Cover and Lid

Procedures for safely removing the top cover and lid of the washing machine.

Disassembly of Tub Cover and Pulsator

Steps to disassemble the tub cover and the pulsator assembly for maintenance.

Assemble Service Tool

Instructions on assembling a service tool for specific maintenance tasks.

Remove Hub Attachment Nut

Procedure for removing the hub attachment nut using a service tool.

Disassembly of Back Cover and Drain Pump

Steps to remove the back cover and the drain pump assembly.

Disassembly of Damper Assembly

Procedures for removing the damper assembly from the washing machine.

Disassembly of Rotor and Stator

Instructions for disassembling the rotor and stator components of the motor.

Disassembly of Door Lock Switch

Steps to safely remove and replace the door lock switch assembly.

4-2. WIRING DIAGRAM

Illustrates the electrical connections and circuits within the washing machine.

4-3. TEST RUNNING WITHOUT WATER

Procedure for testing the washing machine functions without water.

SERVICE MODE

How to enter and utilize the service mode for diagnostics and testing.

4-4. TROUBLESHOOTING BY COMMON WASHING PROBLEMS

Solutions for common washing issues like poor soil removal, stains, and lint.

4-5. TROUBLESHOOTING SUMMARY

A summary of common troubleshooting steps for various machine issues.

4-6. TROUBLESHOOTING WITH ERROR CODE

Explains how to diagnose and resolve errors indicated by specific codes on the display.

DRAIN ERROR Troubleshooting

Specific troubleshooting steps for resolving the drain error code.

LOCKED MOTOR ERROR Troubleshooting

Diagnostic procedures and solutions for locked motor error codes.

UNBALANCE & OVER FLOW ERROR Troubleshooting

Steps to troubleshoot unbalance and overflow error conditions in the washer.

PRESSURE SENSOR ERROR Troubleshooting

Guidance on resolving issues related to the pressure sensor error code.

4-7. OTHER TROUBLESHOOTING

Covers additional troubleshooting scenarios not addressed by specific error codes.

NO POWER Troubleshooting

Steps to diagnose and fix issues where the washing machine does not power on.

POWER BUTTON DOESNT WORK Troubleshooting

Solutions for problems where the power button is unresponsive or malfunctioning.

5. COMPONENT TESTING INFORMATION

5-1. Filter Assembly (Line Filter)

Details on testing the electrical filter assembly, including circuit diagrams and resistance values.

5-2. Door Lock Switch Assembly

Information on testing the door lock switch, its function, and circuit.

5-3. STATOR ASSEMBLY

Testing procedures for the stator assembly, including winding resistance checks.

5-4. PUMP MOTOR ASSEMBLY

Guidance on testing the pump motor assembly for proper operation and resistance.

5-5. INLET VALVE ASSEMBLY

Information on testing the inlet valve solenoids for resistance and function.

5-6. THERMISTOR ASSEMBLY

Details on testing the thermistor (temperature sensor) for accurate readings.

6. EXPLODED VIEW

6-1. EXPLODED VIEW OF TOP COVER ASSEMBLY

An exploded diagram showing all parts of the top cover assembly.

6-2. EXPLODED VIEW OF OUT CASE ASSEMBLY

An exploded diagram illustrating the components of the outer case assembly.

6-3. EXPLODED VIEW OF TUB ASSEMBLY

An exploded diagram detailing the parts that make up the tub assembly.

7. REPLACEMENT PART LIST

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