WD-S17NBW - LG Washing Machine Service Manual (repair manual). Page 20

7. TEST MODE

7-1. SAFETY CAUTION

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 o ff 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.

7-2. LOAD TEST MODE

7-3. HOW  TO CHECK THE  WATER LEVEL FFREQUENCY

1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.

Press the  WASH/RINSE and DEL AY  WASH button simultaneousl y.

The digits indicate the water level frequency ( x.1 kHz ).

=  24.1 kHz

So, for example a display indicating 241: a  Water level frequency of 241 x.1 kHz

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.

None 

1 time 

2 times 

3 times 

4 times 

5 times 

6 times 

7 times 

8 times 

9 times 

10 times 

11 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  bleach  turns  on.

Tumble  counterclockwise .

Heater  turns  on for  3 seconds .

Drain  pump  turns  on.

off

LOAD TEST MODE

Rpm (45~50)

Rpm (55~60)

Rpm (110~115)

Water level frequency (0~255)

Water level frequency (0~255)

Water level frequency (0~255)

Water level frequency (0~255)

rpm (42~50)

Water temperature

Water level frequency (25~65)

-

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