Troubleshooting; Safety Caution; Error Mode Summary - LG WM3988HWM Service Manual

8. TROUBLESHOOTING

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.
8-2. ERROR MODE SUMMERY
If you press the START/PAUSE button when an error is displayed, any error except
and the machine will go into the pause status.
In case of
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
WATER INLET
1
ERROR
UNBALANCE
2
ERROR
3 DRAIN ERROR
4 OVERFLOW ERROR
PRESSURE SENSOR
5
ERROR
6 DOOR OPEN ERROR
7
HEATING ERROR
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, , if the error is not resolved within 20 seconds, or the in case of other errors,
, power will not be turned off.
ERROR SYMPTOM
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CAUSE
• 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 25 minutes.
• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
• Not fully drained within 10 minutes.
• Water is overflowing.
(water level frequency is over 21.3kHz).
If is displayed, the drain pump will operate
to drain the water automatically.
• The PRESSURE SENSOR ASSEMBLY is out of
order.
• When water level frequency maintain condition of
below 10 kHz and over 30 kHz.
• Door not all the way closed.
• Loose electrical connections at Door switch and
PWB Assembly.
• The DOOR SWITCH ASSEMBLY is out of order.
• The THERMISTOR is out of order.
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