LG WM3070HVA Service Manual ▷ View online
26
DRAIN ERROR
Is the connector connected
to pump motor assembly
disconnected or
disassembled?
to pump motor assembly
disconnected or
disassembled?
Reconnect or
repair
the connector.
repair
the connector.
Yes
Circulation pump
Yes
Drain pump
Connection connector
No
Yes
When you press both
WASH/RINSE button and
SOIL LEVEL button
simultaneously, is the
water level frequency
below 25.0 kHz?
WASH/RINSE button and
SOIL LEVEL button
simultaneously, is the
water level frequency
below 25.0 kHz?
(Refer to 7-4.)
Check the AIR
CHAMBER,
the tube
(clogged),
and press
switch.
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
pump too high or low?
(resistance of the coil
is 10-20
Ω)
(Refer to 9-4 Pump motor
assembly.)
assembly.)
Replace the
DRAIN PUMP
ASSEMBLY.
DRAIN PUMP
ASSEMBLY.
No
Yes
Is the voltage between
connectors out of range?
(NA2 pin1~ BL3 pin1)
- After remove Terminal
Position Assurance (TPA)
of connector, check as follows.
connectors out of range?
(NA2 pin1~ BL3 pin1)
- After remove Terminal
Position Assurance (TPA)
of connector, check as follows.
- Pump running : 120V±5%
- Stopped Motor/Pump : 0~1V
- Stopped Motor/Pump : 0~1V
Method
1. Press the Power button, while the SPIN SPEED
1. Press the Power button, while the SPIN SPEED
button and SOIL LEVEL button is pressed
simultaneously.
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
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
substance or material inside that may cause
a machine breakdown.
a machine breakdown.
Replace the
MAIN PWB
ASSEMBLY.
MAIN PWB
ASSEMBLY.
Yes
No
Is
OE ERROR
displayed?
27
HEATING ERROR
Is the connector connected to
heater disconnected or
disassembled?
heater disconnected or
disassembled?
Reconnect or
repair
the connector.
repair
the connector.
Yes
Yes
Is Check heater
resistance out of range?
(12~18 Ω)
resistance out of range?
(12~18 Ω)
(Refer to 9-6 Heater
assembly.)
assembly.)
Replace the
HEATER
ASSEMBLY.
HEATER
ASSEMBLY.
Yes
No
No
Is thermistor resistance
out of range?
(about 39.5 kΩ at 30
out of range?
(about 39.5 kΩ at 30
°C
)
(Refer to 9-7 thermistor
assembly.)
assembly.)
Replace the
THERMISTOR
ASSEMBLY.
THERMISTOR
ASSEMBLY.
Yes
No
Check the trans of water
infiltration into thermistor
terminal.
- Does the water infiltrate
infiltration into thermistor
terminal.
- Does the water infiltrate
thermistor terminal?
[Note]
Chances that the cause occurs from the
main controller are very little.
Sensing part of the circuit (tE) consists of
only resistors and capacitors.
Replace the
THERMISTOR
ASSEMBLY.
THERMISTOR
ASSEMBLY.
Yes
Steam generator heater
Wash heater
Is the connector connected to
thermistor disconnected or
disassembled?
thermistor disconnected or
disassembled?
Reconnect or
repair
the connector.
repair
the connector.
Yes
No
Steam generator thermistor
Wash thermistor
Is
tE ERROR
displayed?
28
LOCKED MOTOR ERROR
Check the connectors below.
Is the connector disconnected
or disassembled?
(motor hall sensor connector,
motor drive connector.)
- part of main PWB
Is the connector disconnected
or disassembled?
(motor hall sensor connector,
motor drive connector.)
- part of main PWB
assembly (NA1, RD4)
Reconnect
the connector.
(connector /
wire / motor )
the connector.
(connector /
wire / motor )
Replace
the ROTOR.
the ROTOR.
Yes
Yes
Motor Drive
Is rotor magnet cracked?
Hall sensor
Motor Drive Hall Sensor
- part of wire
- part of motor
Motor
Yes
No
Yes
Yes
Magnet
Replace
the STATOR.
the STATOR.
Is the resistance values
in the range of 5 to 15
in the range of 5 to 15
Ω?
(U-V, V-W, W-V
:U=1, V=2, W=3)
- After pull out the RD4
:U=1, V=2, W=3)
- After pull out the RD4
connector, check the
terminal of the connector
in wire. (Red 3P, male)
terminal of the connector
in wire. (Red 3P, male)
No
Replace
the Hall
sensor.
the Hall
sensor.
Is hall sensor out of
order?
order?
(Refer to 9-3
Stator assembly/Hall
sensor.)
sensor.)
Yes
No
Replace the
MAIN PWB
ASSEMBLY.
MAIN PWB
ASSEMBLY.
Check the IPM in the
controller.
controller.
No
Is
LE ERROR
displayed?
29
DOOR OPEN ERROR
Yes
Is the connector connected
to door switch or main PWB
disconnected?
to door switch or main PWB
disconnected?
Reconnect or
repair
the connector.
repair
the connector.
Yes
No
Is there clicking sound once
or twice when the
START/PAUSE button is
pressed to start the cycle?
or twice when the
START/PAUSE button is
pressed to start the cycle?
Replace the
PCB
ASSEMBLY.
PCB
ASSEMBLY.
No
Is DOOR SWITCH
ASSEMBLY broken?
ASSEMBLY broken?
Replace the
DOOR
SWITCH
ASSEMBLY.
DOOR
SWITCH
ASSEMBLY.
No
Yes
Does the spring of Latch
Hook actuate?
Hook actuate?
Replace
Door
Assembly.
Door
Assembly.
Yes
No
[Note] Environmental check list
1) The machine must operate with all the doors
1) The machine must operate with all the doors
completely closed and locked.
2) The washing area must operate with a water
temperature not higher than 45 Celsius and
must not have more amount of supplied water
than it should.
must not have more amount of supplied water
than it should.
Is
dE ERROR
displayed?
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