LG WT4801CW Service Manual ▷ View online
29
DRAIN ERROR
Yes
Is
displayed?
Reconnect or
repair the
connector
No
Is the connector connected to
pump motor assembly
disconnected or
disassembled?
When you press both SPIN
SPEED button and DELAY
WASH button simultaneously,
is the water level frequency
below 26.0 kHz?
Drain pump
Connection connector
Yes
No
Is the coil of the drain pump
too high or low? (resistance of
the coil is 10-20 Ω)
Yes
Check the AIR
CHAMBER
,the tube (clogged),
and press
switch
Yes
Is the voltage between
connectors out of range?
(WH6)
- After remove Terminal
Position Assurance
of connector, check as follows.
- Pump running:120V±5%
- Stopped Motor/Pump: 0~1V Method
1. Press the Power button, while the WASH/TEMP
button and SOIL LEVEL buttonis pressed
simultaneously.
2. Press Start/Pause button
: 1 time LED On
: 2 times Button Check
: 3 times Inlet valve check mode
: 4 times Cold Valve, Bleach Valve
: 5 times Rinse Valve, Hot Valve
: 6 times Jet Spray Valve
: 7 times Heater Check
: 8 times Alpha Check
: 9 times Pump Check
[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.
Yes
No
Replace the
DRAIN
PUMP
ASSEMBLY.
Replace the
MAIN PCB
ASSEMBLY.
30
LOCKED MOTOR ERROR
Yes
Is
displayed?
Reconnect
the connector
(connector /
wire / motor)
Check the connectors below.
Is the connector disconnected
or disassembled?
(motor hall sensor connector,
motor drive connector)
- Main PCB Assembly
(YL3, BL6)
Motor Drive
Hall Sensor
- part of wire
Yes
No
No
Is rotor magnet cracked?
Is hall sensor out of order ?
Yes
Yes
Replace the MAIN PCB
No
Yes
Is the resistance values
in the range of 5 to15 Ω?
(U-V, V-W, W-V
:U=1, V=2, W=3)
- After pull out the YL3
connector, check the terminal
of the connector in wire.
No
Replace
the ROTOR
Replace
the STATOR
Replace
the Hall
sensor
- part of motor
Motor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Magnet
31
Yes
No
UNBALANCE ERROR
Is
displayed?
Put laundry evenly
In the DRUM
assembly
Does the laundry lean toward
one side, not evenly put in the
DRUM assembly?
Is the washing machine
installed at an angle?
Yes
Yes
Does the inlet valve work
when the power is not
applied?
Replace the
INLET VALVE ASSEMBLY
No
Adjust the height of
washing machine
to be kept
horizontally
Yes
If the inlet
valve work
continuously
when the power
is applied,
Replace the MAIN
PCB ASSEMBLY
OVER FLOW ERROR
Yes
Is
displayed?
Check the AIR
CHAMBER
and the tube
(clogged).
Yes
When you press both SOAK
button and Spin Speed button
simultaneously, is the water
level frequency over 21.0kHz?
No
32
PRESSURE SENSOR ERROR
Yes
Is
displayed?
Reconnect or
repair
the connector
No
Is the connector connected to
pressure sensor disconnected
or disassembled?
Yes
Replace the
pressure switch
No
Is the resistance of the
pressure sensor out of range?
(pin 1~ pin 3)
(21~23 Ω ±10%)
Yes
No
Is the AIR CHAMBER and the
tube clogged?
Yes Fix the air chamber
and remove
the foreign material
Replace the MAIN PCB
assembly
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