WD-10RFD - LG Washing Machine Service Manual (repair manual). Page 14

7. TROUBLE SHOOTING

7-1.BEFORE SVC CHECKING

■ Be careful of electric shock or disconnecting the parts while trouble shooting.
■ Voltage of each terminal in 220-240V~ and DC while applying an electric current.

7-2.QC TEST MODE.

①

① Pressing Option(Left) and Rinse button simultaneously.
②

② Press the Power        button, while the above condition.
③

③ Press the Start/Pause button as follows. 

Check Point

Display Status

None

Turns on all lamps and locks the door.

1 time

Tumble clockwise.

rpm (42~50)

2 times

Low speed Spin.

rpm (55~65)

3 times

High speed Spin.

rpm (125~155)

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 steam turns on.

Water level frequency (25~65)

8 times

Inlet valve for bleach turns on.

Water level frequency (25~65)

9 times

Tumble counterclockwise.

rpm (42~50)

10 times

Heater turns on for 3 sec.

Water temperature

11 times

Circulation pump turns on.

Water level frequency (25~65)

12 times

Drain pump turns on.

Water level frequency (25~65)

13 times

Water level Sensor for Steam

Water level frequency of TSG(0~255)

14 times

Steam Heater turns on for 1.2 sec.

TSG temperature

15 times

Off

-

Number of times the

Start/Pause button is pressed

QC TEST MODE

7-4.HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION.

7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY

So, for example a display indicating 058: 
a Water level frequency of  20+(58 x 0.1)= 25.8 kHz

Press the Rinse and Medic Rinse button simultaneously.

• The digits indicate the water level frequency.

045
005
028
000
064
000

000
000
028
029
048
222

000
061
000
000
000
280

Press the Rinse and Medic Rinse button simultaneously.

• Thermistor in tub temperature.

045
005
028
000
064
000

000
000
028
029
048
222

000
061
000
000
000
280