WM2050CW - LG Washing Machine Service Manual (repair manual). Page 25

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Is the connector connected
to pump motor assembly
disconnected or
disassembled?

Reconnect or
repair
the connector.

When you press both
CUSTOM button and
PRE-WASH button
simultaneously, is the
water level frequency
below 26.0 kHz?

(Refer to 7-3)

Check the AIR
CHAMBER,
the tube
(clogged),
and press
switch

Is the coil of the drain
pump too high or low?
(resistance of the coil
is 10-20

Ω)

(Refer to 9-4 Pump motor
assembly)

Replace the
DRAIN 
PUMP
ASSEMBLY.

Is the voltage between
connectors out of range?
(BL4 pin1~ BL3 pin1)
- After remove Terminal
Position Assurance (TPA)
of connector, check as
follows.
- And if you finish to measure
the valve, You should put
TPA as original form.

- Pump running : 120V±5%
- Stopped Motor/Pump : 0~1V Method
1. Press the Power button, while the SPIN SPEED

button and WASH/RINSES button is pressed
simultaneously.

2. Press Start/Pause button.

: 1 time  

Pump slow-speed running

: 2 times  

Pump mid-speed running

: 3 times  

Pump high-speed running

: 4 times  

Stop the Motor/Pump

[Note] Environmental check list
1) The drainage hose must not stay in a lower position.
2) The drainage hose must not be bent or

clogged in any way due to the surrounding
physical configuration.

3) The drainage hose must not get frozen at all times.
4) The drainage pump must not have any improper

substance or material inside that may cause
a machine breakdown.

Replace the
MAIN PWB
ASSEMBLY.