WD-E1212TD - LG Washing Machine Service Manual (repair manual). Page 14

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14
7. TROUBLESHOOTING
7-1. BEFORE PERFORMING SERVICE
Be careful of electric shock when disconnecting parts while troubleshooting.
The voltage of each terminal is 220-240V AC and DC when the unit is plugged in.
7-2. QC TEST MODE.
The washer must be empty and the controls must be in the off state.
1. Press the
 Rinse and Temp. buttons simultaneously.
2. Press the Power       button, while the above condition. Then buzzer will sound twice.
3. Press the Start/Pause      button repeatedly to cycle through the test modes.
7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY
Press the 
Option and Tub Clean button simultaneously.
So, for example a display indicating  241: a Water level frequency of 241 x.1 kHz
=  24.1 kHz
The digits indicate the water level frequency ( x.1  kHz ).
Check Point
Display Status
None
Turns on all lamps and locks the door.
1 time
Tumble clockwise.
rpm (40~50)
2 times
Low speed Spin.
rpm (58~65)
3 times
High speed Spin.
rpm (100~120)
4 times
Inlet valve for prewash turns on.
Water level frequency (25~65)
5 times
Inlet valve for main wash turns on.
Water level frequency (25~65)
6 times
Inlet valve for hot water turns on.
Water level frequency (25~65)
7 times
Inlet valve for bleach turns on.
Water level frequency (25~65)
8 times
Tumble counterclockwise.
rpm (40~50)
9 times
Heater turns on for 3 sec.
Water temperature
10 times
Circulation pump turns on.
Water level frequency (25~65)
11 times
Drain pump turns on.
Water level frequency (25~65)
12 times
Power off and unlock the door.
Turn off all lamps.
Number of times the
Start/Pause button is pressed
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