WF-T1022THX - LG Washing Machine Service Manual (repair manual). Page 37

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36
4-6. TEST RUNNING WITHOUT WATER
1) METHOD TO USE QC TEST MODE
Check method
No.
Check points 
Start/Pause
Errorr 
Remedy
KEY PUSH Press
Load
Display
1
LED
Begining point
Buzz once
LED on all
-
Check pressure
and
No.200 displayed
S/W assembly.
Pressure Sensor
LEVEL 
No.264~270 is 
Check connector.
(check level) 
displayed.
Replace 
controller's IC3.
2
Motor
Press once
Pulsator
No.70~125 is 
Check in unload
rotates to
displayed. 
condition.
left four
Check connector.
times and 
Check driving 
right four
part (Motor,
times.
Clutch, V-belt, 
Capacitor).
3
Cold water valve
Press twice
Cold 
valve
-
starts.
4
Hot water valve
Press three time
Hot water
Top filter of supply
valve   
valve is clogged 
starts
with dregs.
Check connector.
Check if TR3(hot)
TR4(cool) and
5
Shower valve
Press four times
Shower
TR5(shower) are
valve
ON in load driving
starts
-
Part of connector
asm.
6 Check drain valve
Press five times
Drain valve
Check door.
ON(Turbo
Door 
Check drain hose
Drum).
error
and drain motor.
(Buzz
Check connector.
continued)
Check TR6 in
controller asm.
7
Check the drain 
Press Six times
Drain Pump
Check drain pump
Pump.
ON
Check TR8 in
Drain Valve
controller asm.
ON
Check connector.
8 Check the AUTO  Press Seven times
Power off
LED off
OFF switch. 
within 1
sec.
50Hz
60Hz
Normal condition
sensor
Frequency
display
▶ To use check program (QC test mode), power ON with  water temperature and water level.  
Key pressed in non-load empty water.
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