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LG WM3700H A /01 Series User Manual

LG WM3700H A /01 Series
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MODELS : WM3700HWA /02
WM3700HVA /01
WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
CAUTION
CONFIDENTIAL
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or
transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity
from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in
this Service Manual.
Copyright © 2016 - 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
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LG WM3700H A /01 Series Specifications

General IconGeneral
TypeFront Load Washer
Capacity4.5 cu. ft.
Energy Star CertifiedYes
Spin Speed1300 RPM
Number of Wash Programs14
Steam TechnologyYes
Smart DiagnosisYes
Allergiene CycleYes
TurboWashYes
Width27 inches
Height39 inches
ColorWhite

Summary

1. SPECIFICATIONS

2. FEATURES & TECHNICAL EXPLANATION

2-1. FEATURES

Details the key features of the washing machine, including capacity, motor, door, and smart functions.

2-2. NEURO FUZZY WASHING TIME OPTIMIZATION

Explains how the washing time is optimized using water temperature, selected temperature, and load size.

2-3. WATER LEVEL CONTROL

Describes how the pressure sensor controls water level in the tub for washing.

2-4. DOOR CONTROL

Details the operation of the door lock and unlock mechanism during cycles.

2-5. THE DOOR CAN NOT BE OPENED

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

2-6. CHILD LOCK

Explains how to activate and deactivate the child lock feature for safety.

2-7. NFC (Tag On Function)

Describes the NFC Tag On function for smartphone connectivity and features.

3. PARTS IDENTIFICATION

4. INSTALLATION & TEST

STANDARD INSTALLATION

Details the steps for standard installation, including bolt removal, surface, and leveling.

7. TEST OPERATION

5. OPERATION

5-1. CONTROL PANEL FEATURES

Explains the features and layout of the washing machine control panel.

Option Button

Details the various option buttons and their functions like Pre Wash, Delay Wash, Child Lock.

Wash Temp., Spin speed, Soil Level, Signal Button

Explains how to adjust water temperature, spin speed, soil level, and signal volume.

5-2. Cycle Guide

Provides a guide to different wash cycles, fabric types, and recommended settings.

5-3. SPECIAL FUNCTIONS

Describes special functions like Child Lock, Fresh Care, Remote Start, and Wi-Fi Connect.

5-4. Explanation of each process

Details the step-by-step explanation of each washing process from start to finish.

6. TEST MODE

6-1. SAFETY CAUTION

Provides critical safety warnings for performing test modes on the appliance.

6-2. LOAD TEST MODE

Explains the procedure and steps for conducting the load test mode.

6-3. HOW TO CHECK THE WATER LEVEL FFREQUENCY

Guides on how to check the water level frequency using specific button combinations.

7. TROUBLESHOOTING

7-1. SAFETY CAUTION

General safety precautions to be observed during troubleshooting procedures.

7-2. ERROR MODE SUMMARY

Lists common error codes, their symptoms, and potential causes for diagnosis.

7-3. TROUBLESHOOTING WITH ERROR

Provides a step-by-step troubleshooting guide for specific error codes like Inlet Valve Error.

DRAIN ERROR TROUBLESHOOTING

Troubleshooting steps for addressing a drain error, checking pump and connections.

LOCKED MOTOR ERROR TROUBLESHOOTING

Troubleshooting guide for locked motor errors, checking connectors, rotor, and stator.

DOOR OPEN ERROR TROUBLESHOOTING

Steps to diagnose and resolve door open errors, checking switches and connections.

UNBALANCE ERROR TROUBLESHOOTING

Troubleshooting for unbalance errors, focusing on load distribution and installation.

OVER FLOW ERROR TROUBLESHOOTING

Guide to resolve overflow errors, checking water level frequency and inlet valve.

PRESSURE SENSOR ERROR TROUBLESHOOTING

Troubleshooting steps for pressure sensor errors, checking connectors and resistance.

7-5. Before using the Tag On function

Guides on preparing the appliance and smartphone for the Tag On function.

8. COMPONENT TESTING INFORMATION

8-1. FILTER ASSEMBLY (LINE FILTER)

Details the testing procedure and results for the line filter assembly.

8-2. DOOR LOCK SWITCH ASSEMBLY

Explains the function and testing of the door lock switch assembly.

8-3. STATOR ASSEMBLY

Describes the stator assembly function and provides test points and results.

8-4. PUMP MOTOR ASSEMBLY

Details the pump motor assembly, its function, and testing procedures.

8-5. INLET VALVE ASSEMBLY

Explains the inlet valve assembly function and provides test points and resistance values.

8-6. THERMISTOR ASSEMBLY

Details the thermistor assembly function and provides test points and resistance values.

9. DISASSEMBLY INSTRUCTIONS

CONTROL PANEL DISASSEMBLY

Provides step-by-step instructions for disassembling the control panel assembly.

MAIN PWB ASSEMBLY DISASSEMBLY

Instructions for safely disassembling the main PCB assembly.

DISPENSER ASSEMBLY DISASSEMBLY

Step-by-step guide for disassembling the detergent dispenser assembly.

NOISE FILTER DISASSEMBLY

Instructions on how to disassemble and remove the noise filter.

CABINET COVER DISASSEMBLY

Detailed steps for disassembling the washing machine's cabinet cover.

DOOR DISASSEMBLY

Instructions for disassembling the washing machine door and hinge.

DOOR LOCK SWITCH ASSEMBLY REPLACEMENT

Steps for removing and replacing the door lock switch assembly.

PUMP DISASSEMBLY

Instructions for disassembling the water pump assembly and its related parts.

MOTOR/DAMPER DISASSEMBLY

Guide to disassembling the motor and damper components.

10. EXPLODED VIEW

CABINET & CONTROL PANEL ASSEMBLY

Exploded view diagram of the cabinet and control panel assembly components.

DRUM & TUB ASSEMBLY

Exploded view of the drum and tub assembly, showing internal parts.

DISPENSER ASSEMBLY

Exploded view of the dispenser assembly and its components.

11. WIRING DIAGRAM

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