WD-R1112 - LG Washing Machine Service Manual (repair manual). Page 14

7. TROUBLE SHOOTING

7-1. BEFORE PERFORMING SERVICE

■ Be careful of electric shock when disconnecting parts while troubleshooting.
■ The voltage of each terminal is 110/120 V 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 Wash/Rinse and Spin Speed 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 Wash/Rinse and Spin Speed 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

3 times

High speed Spin.

rpm

4 times

Inlet valve for bleach 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 dry 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

Drain pump turns on.

Water level frequency (25~65)

11 times

Dry operation for 6 minutes.

Temperature in Dry duct.

12 times

Power off and unlock the door.

Turn off all lamps.

Number of times the

Start/Pause button is pressed