WM-10240F - LG Washing Machine Service Manual (repair manual). Page 14

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13
7. TROUBLESHOOTING
7-1. BEFORE PERFORMING SERVICE
Be careful of electric shock or disconnecting the parts while troubleshooting.
Voltage of each terminal in 220-240V~ and DC while applying an electric current.
7-2. QC TEST MODE.  
Pressing Temp., and Option buttons simultaneously.
Power supply ON with pressing upper two button.
Press the START/PAUSE button as follows.
~
Press the START/PAUSE button more 4 times until stop spinning
Pressing number of
START/PAUSE
button
Checking Point
None
All lamps turn on
1 time
Clockwise spin (right)
2 times
Low speed spin
3 times
High speed spin
4 times
Inlet valve for pre-wash operation
5 times
Inlet valve for main-wash operation
Hot inlet valve in case of hot water fill
6 times
Inlet valve for main-wash operation 
7 times
Counterclockwise spin (left)
8 times
A Heater is in operation for 3 sec.
9 times
Draining pump operation
10 times
Auto off operation
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