LG 29478 Service Manual ▷ View online
33
DRAIN ERROR
Yes
Is “OE” displayed?
Reconnect or
repair the
connector
repair the
connector
No
Is the connector connected to
pump motor assembly
disconnected or
disassembled?
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?
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
too high or low? (resistance of
the coil is 10-20
Ω)
Yes
Check the AIR
CHAMBER, the
tube (clogged),
and press switch
CHAMBER, the
tube (clogged),
and press switch
Yes
Is the voltage between
connectors out of range?
(WH6 Pin 1)
- After remove Terminal
Position Assurance
of connector, check as follows.
connectors out of range?
(WH6 Pin 1)
- After remove Terminal
Position Assurance
of connector, check as follows.
- Pump running : 120V±5%
- Stopped Motor/Pump : 0~1V
Method
1. Press the ‘Prefs’ button.
2. Press the display LCD for 3 seconds.
3. Press Start/Pause button
- Stopped Motor/Pump : 0~1V
Method
1. Press the ‘Prefs’ button.
2. Press the display LCD for 3 seconds.
3. Press Start/Pause button
: 1 times
➔ Display Ver.
: 2 times
➔ Inlet valve check mode
: 3 times
➔ Cold Valve, Bleach Valve
: 4 times
➔ Rinse Valve, Hot Valve
: 5 times
➔ Jet Spray Valve
: 6 times
➔ Heater Check
: 7 times
➔ Alpha Check
: 8 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
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
physical configuration
3) The drainage hose must not get frozen at all times.
4) The drainage pump must not have any improper
4) The drainage pump must not have any improper
substance or material inside that may cause
a machine breakdown.
a machine breakdown.
Yes
No
Replace the
DRAIN
PUMP
ASSEMBLY.
DRAIN
PUMP
ASSEMBLY.
Replace the
MAIN PCB
ASSEMBLY.
MAIN PCB
ASSEMBLY.
34
LOCKED MOTOR ERROR
Yes
Is “LE” displayed?
Reconnect
the connector
(connector /
wire / motor )
the connector
(connector /
wire / motor )
Check the connectors below.
Is the connector disconnected
or disassembled?
(motor hall sensor connector,
motor drive connector)
Is the connector disconnected
or disassembled?
(motor hall sensor connector,
motor drive connector)
- part of 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
Check the IPM in the
controller
controller
No
No
Yes
Is the resistance values
in the range of 5 to15
in the range of 5 to15
Ω?
(U-V, V-W, W-V
:U=1, V=2, W=3)
- After pull out the YL3
:U=1, V=2, W=3)
- After pull out the YL3
connector, check the
terminal of the connector
in wire.
terminal of the connector
in wire.
No
Replace
the ROTOR
the ROTOR
Replace
the STATOR
the STATOR
Replace
the Hall
sensor
the Hall
sensor
Replace the
MAIN PCB
ASSEMBLY
MAIN PCB
ASSEMBLY
- part of motor
Motor
Hall Sensor
Motor Drive
Magnet
35
UNBALANCE ERROR
Yes
Is “UE” displayed?
Put laundry evenly
In the DRUM
assembly
In the DRUM
assembly
No
Does the laundry lean
toward one side, not evenly
put in the DRUM assembly?
toward one side, not evenly
put in the DRUM assembly?
Is the washing machine
installed at an angle?
installed at an angle?
Yes
Yes
Does the inlet valve work
when the power is not
applied?
when the power is not
applied?
Replace the
INLET VALVE ASSEMBLY
INLET VALVE ASSEMBLY
No
Adjust the height of
washing machine
to be kept
horizontally
washing machine
to be kept
horizontally
Yes
If the inlet valve
work continuously
when the power is
applied, Replace
the MAIN PCB
ASSEMBLY
work continuously
when the power is
applied, Replace
the MAIN PCB
ASSEMBLY
OVER FLOW ERROR
Yes
Is “FE” displayed?
Check the AIR
CHAMBER
and the tube
(clogged).
CHAMBER
and the tube
(clogged).
Yes
When you enter the SVC
mode, is the water level
frequency over 21.0kHz?
mode, is the water level
frequency over 21.0kHz?
No
PRESSURE SENSOR ERROR
36
Yes
Is “PE” displayed?
Reconnect or
repair the
connector
repair the
connector
No
Is the connector connected
to pressure sensor
disconnected or
disassembled?
to pressure sensor
disconnected or
disassembled?
Yes
Replace the
pressure switch
pressure switch
No
Is the resistance of the
pressure sensor out of range?
(pin 1~ pin 3)
(21~23
pressure sensor out of range?
(pin 1~ pin 3)
(21~23
Ω±10%)
Yes
No
Is the AIR CHAMBER and the
tube clogged?
tube clogged?
Yes
Fix the air
chamber and
remove the foreign
material
chamber and
remove the foreign
material
Replace the MAIN PCB
assembly
assembly
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