48842800 - LG Washing Machine Service Manual (repair manual). Page 17

7. TEST MODE

7-1. SAFETY CAUTION

7-2. LOAD TEST MODE.

The washer must be empty and the controls must be in the off state.
1. Press the SPIN SPEED and SOIL LEVEL 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 SPIN SPEED and SOIL LEVEL button simultaneously.

None 

1 time 

2 times 

3 times 

4 times 

5 times 

6 times 

7 times 

8 times 

9 times 

10 times 

11 times 

12 times

Turns on all lamps and locks the door.

Tumble clockwise.

Low speed Spin.

High speed Spin. 

Inlet valve for prewash turns on. 

Inlet valve for main wash turns on. 

Inlet valve for hot water turns on. 

Inlet valve for softener turns on. 

Inlet valve for bleach turns on. 

Tumble counterclockwise.

Heater turns on for 3 sec.

Drain pump turns on.

Power off and unlock the door.

rpm (40~50)

600 rpm

1100 rpm

Water level frequency (25~65)

Water level frequency (25~65) 

Water level frequency (25~65) 

Water level frequency (25~65) 

Water level frequency (25~65) 

rpm (40~50)

Water temperature

Water level frequency (25~65)

Turn off all lamps.

The digits indicate the water level frequency ( x.1 kHz ).
For example, if  the display indicate 241, 
the water level frequency is 241 x 0.1kHz  = 24.1kHz. 

Number of times the

Start/Pausebutton is pressed

Check Point

Display Status

There’s built-in AC 110V and DC power in output terminal of PWB assembly in common. Be careful electric
shock when disconnecting parts while trouble shooting. (Wear Electro Static Discharge gloves when working.)
After cutting off the power when changing PWB assembly, disconnect or assemble.
Be careful static when handling PWB assembly, and use Electro Static Discharge plastic pack when
delivering or keeping it.