Table Of Contents - LG WT7800C Series Service Manual

This service information is intended for individuals possessing adequate backgrounds of
electrical, electronic, and mechanical experience. Any attempt to repair this appliance may result
in personal injury or property damage. The manufacturer or seller can not be responsible for the
interpretation of this information, nor can it assume any liability in connection with its use.
WARNING:
appliance, follow basic precautions, including the following:
· Wear gloves when working.
Failure to do this can result in serious injury.
· The appliance is heavy. Two or more people is
required when moving the appliance.
There is a risk of serious back injury or other injuries.
· Certain internal parts are intentionally not
grounded and may present a risk of electric shock
only during servicing. Service personnel - Do not
contact the following parts while the appliance is
energized: Pump bracket, rotor, and heater.
To reduce the risk of fire, electric shock, or personal injury when using this appliance, follow basic precautions,
including the following.
CONTENTS
1. Specifications ........................................... 3
2. Installation Instructions
2-1. How to Adjust Level ........................... 4
2-2. Connecting Water Supply Hose ........ 6
2-3. Connect the Drain Hose .................... 7
3. Operating Instructions
3-1. Identification of Parts ........................ 8
3-2. Before Starting to Wash .................... 9
3-3. Function of Each BUTTON ............ 16
3-4. Washing Programs ......................... 18
3-5. Care and Maintenance .................... 19
4. Service Information
4-1. Disassembly Instruction .................. 20
4-2. Wiring Diagram ............................... 27
4-3. Test Running Without Water ........... 28
4-4. Troubleshooting By Common
Washing Problems .............................29
4-5. Troubleshooting Summary ................ 30
SAFETY PRECAUTION!
IMPORTANT SAFETY NOTICE!
To reduce the risk of fire, electric shock, or personal injury when using this
· Disconnect this appliance from the power supply
before servicing. Turning the controls to the off
position does not disconnect this appliance from
the power supply.
Failure to do this can result in shock.
· Reconnect all grounded devices after servicing.
Failure to do this can result in shock.
4-6. PCB Picture ...................................... 31
4-7. Troubleshooting with Error Code ...... 32
4-8. Other Troubleshooting ...................... 37
5. Component Testing Information ................ 39
5-1. Filter Assembly (Line Filter) .............. 39
5-2. Door Lock Switch Assembly .............. 40
5-3. Stator Assembly ................................ 42
5-4. Pump Motor Assembly ...................... 43
5-5. Inlet Valve Assembly ......................... 44
6. Exploded View ......................................... 45
7. Replacement Part List .............................. 49
7. Wiring Diagram ........................................ 50
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