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LG WM4270HVA User Manual

LG WM4270HVA
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WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL: WM4270H*A
Website : http://biz.lgservice.com
1
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LG WM4270HVA Specifications

General IconGeneral
TypeFront Load Washer
Capacity4.5 cu. ft.
ColorGraphite Steel
Energy Star CertifiedYes
Spin Speed1300 RPM
Number of Wash Programs14
Steam TechnologyYes
SmartThinQ (Wi-Fi)Yes
TurboWashYes
Allergiene CycleYes
Width27 inches
Cycle TimeVaries by cycle

Summary

1. SPECIFICATIONS

2. FEATURES & TECHNICAL EXPLANATION

2-1. FEATURES

Details various innovative features of the washing machine for enhanced performance.

2-2. NEURO FUZZY WASHING TIME OPTIMIZATION

Explains the intelligent system that optimizes washing time based on load and temperature.

2-3. WATER LEVEL CONTROL

Describes how the pressure sensor manages water levels for efficient washing.

2-4. DOOR CONTROL

Details the mechanism and conditions for door locking and unlocking during operation.

2-5. THE DOOR CAN NOT BE OPENED

Lists conditions under which the washing machine door cannot be opened.

2-6. DOOR LOCKED LAMP LIGHTS

Explains the conditions that trigger the door locked lamp light.

2-7. CHILD LOCK

Describes how to activate/deactivate the child lock to prevent unintended operation.

2-8. WATER CIRCULATION

Explains the water circulation process during washing and rinsing cycles.

2-9. STEAM

Details the steam washing function for enhanced cleaning and its recommended uses.

2-10. NFC (Tag On Function)

Explains the NFC function for smartphone communication and data transfer.

3. PARTS IDENTIFICATION

4. INSTALLATION & TEST

STANDARD INSTALLATION

Provides step-by-step instructions for standard installation of the washing machine.

HOW TO CONNECT THE INLET HOSE

Details the procedure for correctly connecting the water inlet hose to the appliance.

CONNECT THE DRAIN HOSE

Explains the proper method for connecting the drain hose to ensure correct drainage.

CONNECT POWER PLUG

Guides on safely connecting the power plug to a suitable electrical outlet.

7 TEST OPERATION

5. OPERATION

5-1. CONTROL PANEL FEATURES

Details the functions and layout of the washing machine's control panel.

5-2. Cycle Guide

Provides a comprehensive guide to available cycles, fabric types, and options.

5-3. SPECIAL FUNCTIONS

Explains special functions like Child Lock, Load Size, and Tub Clean.

5-4. Explanation of each process

Details the step-by-step explanation of various washing processes.

6. TEST MODE

6-1. SAFETY CAUTION

Provides critical safety precautions to be observed during test mode operations.

6-2. LOAD TEST MODE

Outlines the procedure for entering and operating the load test mode.

6-3. HOW TO CHECK THE WATER LEVEL FFREQUENCY

Explains how to check the water level frequency for diagnostic purposes.

7. TROUBLESHOOTING

7-1. SAFETY CAUTION

Emphasizes safety precautions when performing troubleshooting procedures.

7-2. ERROR MODE SUMMARY

Summarizes common error codes, their symptoms, and potential causes.

7-3. TROUBLESHOOTING WITH ERROR

Provides detailed troubleshooting steps for specific error codes like Inlet Valve Error.

DRAIN ERROR

Offers troubleshooting guidance for drain errors, including checks and part replacements.

HEATING ERROR

Details troubleshooting steps for heating errors, focusing on thermistor and heater checks.

LOCKED MOTOR ERROR

Guides through diagnosing and resolving locked motor errors by checking components.

DOOR OPEN ERROR

Provides steps to troubleshoot door open errors, checking latch and switch assembly.

UNBALANCE ERROR

Offers solutions for unbalance errors by checking load distribution and leveling.

OVER FLOW ERROR

Details troubleshooting for overflow errors, including water level frequency checks.

PRESSURE SENSOR ERROR

Guides on troubleshooting pressure sensor errors by checking connections and resistance.

7-4. TROUBLESHOOTING ELSE

Covers troubleshooting for issues not related to specific error codes, like no power.

BUTTON DOESN'T WORK

Provides troubleshooting steps when buttons on the control panel are unresponsive.

VIBRATION & NOISE IN SPIN

Addresses issues related to vibration and noise during the spin cycle.

DETERGENT DOES NOT FLOW IN

Guides on resolving issues where detergent is not dispensed correctly.

LIQUID DETERGENT/SOFTENER/BLEACH DOES NOT FLOW IN

Troubleshoots problems with dispensing liquid detergent, softener, or bleach.

ABNORMAL SOUND

Helps diagnose and resolve abnormal sounds coming from the washing machine.

7-5. Before using the Tag On function

Explains the prerequisites and steps for using the Tag On function with a smartphone.

8. COMPONENT TESTING INFORMATION

8-1. FILTER ASSEMBLY (LINE FILTER)

Provides testing procedures and expected results for the line filter component.

8-2. DOOR LOCK SWITCH ASSEMBLY

Details the function and testing method for the door lock switch assembly.

8-3. STATOR ASSEMBLY

Outlines the testing procedure for the stator assembly, including winding resistance.

8-4. PUMP MOTOR ASSEMBLY

Explains the testing process for the drain and circulation pump motors.

8-5. INLET VALVE ASSEMBLY

Details the testing procedure for the inlet valve assembly, including resistance checks.

8-6. HEATER ASSEMBLY

Provides instructions for testing the wash heater assembly and its expected resistance.

8-7. THERMISTOR ASSEMBLY

Explains how to test the wash thermistor, focusing on resistance at different temperatures.

9. DISASSEMBLY INSTRUCTIONS

CONTROL PANEL

Guides on disassembling the control panel and display assembly.

MAIN PWB ASSEMBLY

Details the step-by-step process for removing and disassembling the main PWB assembly.

DISPENSER ASSEMBLY

Instructions for disassembling the detergent dispenser assembly and its components.

NOISE FILTER

Explains how to disassemble the noise filter.

CABINET COVER

Provides instructions for disassembling the washing machine's cabinet cover.

DOOR

Guides on disassembling the washing machine door and its related components.

DOOR LOCK SWITCH ASSEMBLY

Details the disassembly of the door lock switch assembly.

PUMP

Instructions for disassembling the pump assembly.

HEATER

Guides on disassembling the heater assembly.

WHEN FOREIGN OBJECT IS STUCK BETWEEN DRUM AND TUB

Explains how to remove foreign objects stuck between the drum and tub.

LAMP ASSEMBLY

Details the disassembly of the lamp assembly.

MOTOR/DAMPER

Instructions for disassembling the motor and damper components.

11. EXPLODED VIEW

11-1. CABINET & CONTROL PANEL ASSEMBLY

Exploded view of the cabinet and control panel assembly.

11-2. DRW&TUB ASSEMBLY

Exploded view of the drum and tub assembly.

11-3. DISPENSER ASSEMBLY

Exploded view of the dispenser assembly.

11. Wiring Diagram

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