WM2550HVCA - LG Washing Machine Service Manual (repair manual). Page 17

8. TROUBLESHOOTING

If you press the START/PAUSE button when an error is displayed, any error except  will
disappear and the machine will go into the pause status.
In case of            ,           ,            if the error is not resolved within 20 seconds, or the in case of other
errors, if the error is not resolved within 4 minutes, power will be turned off automatically and the error
code will blink. But in the case of          , power will not be turned off.

8-1. SAFETY CAUTION

There’s built-in AC 120V 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.

WATER INLET
ERROR

• Correct water level (24.6kHz) is not reached within 

8 minutes after water is supplied or it does not reach
the preset water level within 20 minutes.

UNBALANCE
ERROR

• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.

DRAIN ERROR

• Not fully drained within 10 minutes.

OVERFLOW ERROR

• W ater is overflowing. 

(water level frequency is over 21.3kHz).

If              is displayed, the drain pump will 
operate to drain the water automatically.

PRESSURE SENSOR
ERROR

• The PRESSURE SENSOR ASSEMBLY is out of

order.

• When water level frequency maintain condition of

below 10 kHz and over 30 kHz.

DOOR OPEN ERROR

• Door not all the way closed.
• Loose electrical connections at Door switch and

PWB Assembly.

• The DOOR SWITCH ASSEMBLY is out of order.

HEATING ERROR

• The THERMISTOR is out of order.

8-2. ERROR MODE SUMMARY