LG WM3070HVA Service Manual ▷ View online
30
UNBALANCE ERROR
OVER FLOW ERROR
[Note] Environmental check list
1) Removal of transportation-based fixed bolt.
2) Confirmation on the material to see if it is capable
1) Removal of transportation-based fixed bolt.
2) Confirmation on the material to see if it is capable
of handling two different types of blanket materials.
Yes
Does the laundry lean
toward one side, not evenly
put in the DRUM assembly?
toward one side, not evenly
put in the DRUM assembly?
Put laundry
evenly
In the DRUM
assembly
evenly
In the DRUM
assembly
Yes
Is the washing machine
installed at an angle?
installed at an angle?
Adjust the
height of
washing
machine
to be kept
horizontally.
height of
washing
machine
to be kept
horizontally.
Yes
No
Yes
When you press both
WASH/RINSE button and
WASH/RINSE button and
SOIL LEVEL button
simultaneously, is the
water level frequency over
21.3kHz?
simultaneously, is the
water level frequency over
21.3kHz?
(Refer to 7-4.)
Check the AIR
CHAMBER
and the tube
(clogged).
CHAMBER
and the tube
(clogged).
No
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.
If the inlet
valve work
continuously
when the power
is applied,
Replace the
MAIN PWB
ASSEMBLY.
valve work
continuously
when the power
is applied,
Replace the
MAIN PWB
ASSEMBLY.
No
Yes
Yes
Is
UE ERROR
displayed?
Is
FE ERROR
displayed?
31
PRESSURE SENSOR ERROR
Yes
Is the connector connected
to pressure sensor
disconnected or
disassembled?
to pressure sensor
disconnected or
disassembled?
Reconnect or
repair
the connector.
repair
the connector.
No
No
Yes
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%)
Replace the
pressure
switch.
pressure
switch.
No
Yes
Is the AIR CHAMBER and
the tube clogged?
the tube clogged?
Replace the MAIN PWB
assembly.
assembly.
Fix the air
chamber
and remove
the foreign
material.
chamber
and remove
the foreign
material.
Yes
Is
PE ERROR
displayed?
32
8-5. TROUBLESHOOTING ELSE
NO POWER
1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
CAUTION
Check the
fuse or reset
the circuit
breaker.
fuse or reset
the circuit
breaker.
Yes
No
Is the current rating of
multi-outlet power strip
enough?
(Avoid connecting several
electric devices.)
multi-outlet power strip
enough?
(Avoid connecting several
electric devices.)
Is the supplied voltage
120V AC?(+10%, -15%)
120V AC?(+10%, -15%)
Alternate with
explanation.
explanation.
Yes
Yes
No
Is the connector connected
to PCB/Noise filter
disconnected or
disassembled?
to PCB/Noise filter
disconnected or
disassembled?
Reconnect
or repair
the connector.
or repair
the connector.
No
Replace the
MAIN PWB
ASSEMBLY.
MAIN PWB
ASSEMBLY.
Yes
No
Is LED on while the power
is on?
is on?
Replace the
DISPLAY
PWB
ASSEMBLY.
DISPLAY
PWB
ASSEMBLY.
Display PWB
Connecting connector
MAIN PWB~ Display PWB
No
Is five pin wire of
display PWB broken?
display PWB broken?
33
BUTTON DOESN’T WORK
Is the connector connected
to Main PWB / Display
PWB disconnected or
disassembled?
to Main PWB / Display
PWB disconnected or
disassembled?
Reconnect or
Repair
the connector.
Repair
the connector.
Yes
Is the display PCB broken?
(check the buzzer sound
and LED light while push the
button.)
(check the buzzer sound
and LED light while push the
button.)
Replace the
DISPLAY
PWB
ASSEMBLY.
DISPLAY
PWB
ASSEMBLY.
Yes
Is the button of panel stuck?
Repair the
button.
button.
Yes
No
No
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