F1391QDP - LG Washing Machine Service Manual (repair manual). Page 17

Before servicing ask the customer what the trouble is.
Check the adjustments. (Power supply :220-240V~, Removal of transit bolts etc..)
Check the troubles referring to the troubleshooting.
Decide service steps referring to disassembly instructions.
Then, service and repair.
After servicing, operate the appliance to see whether it works OK or NOT.

7. TROUBLESHOOTING

7-1. BEFORE PERFORMING SERVICE

7-2. LOAD TEST MODE

1 F1*92T/QD : Press and Hold ‘

’ & ‘

’ buttons and then press ‘

’ button.

7-3. HOW TO KNOW THE WATER LEVEL FREQUENCY

F1*92T/QD : Press and Hold ‘Spin’ & ‘Pre Wash ’ buttons simultaneously.

2 The washer must be empty and the controls must be in the off state.
3 Press Power with above two buttons pressed and then buzzer will sound.
4 Press the Start/Pause button repeatedly to cycle through the test modes

1
2
3
4
5
6

None 

1 time 

2 times 
3 times 

4 times 

5 times 

6 times 
7 times 
8 times 
9 times 

10 times 

All lamps turn on
Clockwise 

wash (right) 

Low speed Spin 
High speed Spin

Inlet valve for pre-wash operation

Inlet valve for main-wash operation

Hot inlet valve in case of hot water fill
Counterclockwise wash (left) 
A Heater is in operation for 3 sec.
Draining pump operation 

Auto off operation

Motor rpm (About 47)
Motor rpm (About 590~650)
Motor rpm (About 950~1050) : F80**TD(1~9)
Motor rpm (About 1100~1250) : F10/2**TD(1~9) 
Motor rpm (About 1350~1400) : F14**TD(1~9) 
Water level frequency (255->299)

Water level frequency (255->299)

Water level frequency (255->299)
Motor rpm (About 47)
Water Temperature
Water level frequency

The digits means water level frequency (10

-1

kHz)

ex) 241 : Water level frequency = 241 X 10

-1

kHz

= 24.1kHz