WD-7800, WD-708MW, WD-10750SR - LG Washing Machine Service Manual (repair manual). Page 17

Before servicing ask the customer what the trouble is.
Check the adjustments. (Power supply :220-240V~, Removal of transit bolts etc..)
Check the troubles referring to the troubleshooting.
Decide service steps referring to disassembly instructions.
Then, service and repair.
After servicing, operate the appliance to see whether it works OK or NOT.

7. TROUBLESHOOTING

7-1. BEFORE PERFORMING SERVICE

7-2. LOAD TEST MODE

1   Press and Hold ‘ Temp.'&'Spin'buttons and then press 'Power'button.

The washer must be empty and the controls must be in the off state.

7-3. HOW TO KNOW THE WATER LEVEL FREQUENCY

Press and Hold 'Temp.''Spin'buttons simultaneously.

3 Press Power with above two buttons pressed and then buzzer will sound.
4 Press the Start/Pause button repeatedly to cycle through the test modes

1
2
3
4

5
6

None 

1 time 

2 times 
3 times 

4 times 
5 times 

6 times 
7 times 
8 times 
9 times 

10 times 

All lamps turn on
Clockwise spin (right) 
Low speed Spin 
High speed Spin

Inlet valve for pre-wash operation
Inlet valve for main-wash operation
Hot inlet valve in case of hot water fill
Inlet valve for main-wash operation
Counterclockwise spin (left) 
A Heater is in operation for 3 sec.
Draining pump operation 
Auto off operation

Motor rpm (About 47)
Motor rpm (About 590~650)
Motor rpm (About 750~ 850) :
Motor rpm (About 

) 

Motor rpm (About 

) 

Water level frequency (225~265)

Water level frequency (225~265)

Water level frequency (225~265)
Motor rpm (About 47)
Water Temperature
Water level frequency

Ｆ８０Ａ５ＱＤＰ

Ｆ１０Ａ５ＱＤＰ

Ｆ１２Ａ５ＱＤＰ

The digits means water level frequency (10

-1

kHz)

ex) 257 : Water level frequency = 257 X 10

-1

kHz

= 25.7kHz

Pressing number of

[Start/Pause] button

Checking Point

Display Status

2