LG WT-Y122X Service Manual ▷ View online
44
4) Water doesn’t come into the wash tub.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Inlet Valve
1. If water doesn’t come though the
inlet valve works(electric sound
occurs)
occurs)
1) Check whether water mains is cut.
2) Check whether tabs are turned on.
3) Hot & cold tab are opposite
connected.
4) Wrongly select water temperature
option.
5) If there are no problems in the
above, check the inlet valve filters
after disconnecting the water supply
after disconnecting the water supply
hoses.
6) If there are no problems in the
above a diaphragm hole in the valve
is blocked by foreign substance or
the plunger in it is locked.
is blocked by foreign substance or
the plunger in it is locked.
2. If the inlet valve doesn’t work(there
is no electric sound)during filling
cycle.
cycle.
1) Check whether it’s connectors are
taken off or they have poor
connection.
2) Check resistance of the inlet valve.
Water mains cut.
Don’t tumed on.
Connected
opposite.
opposite.
Selected
opposite.
opposite.
Filters blocked
by foreign
substance.
by foreign
substance.
A connector is
taken off.
taken off.
∞ Ω
Mains cut.
Mistake of use.
Wrong installation.
Mistake of use.
Don’t clean.
Defect of the
inlet valve.
Defect of contact.
Coil is open
Explain.
Turn on the tap.
Correct their locations
and turn on the tap.
and turn on the tap.
Explain how to use.
Clean them by brush
and explain cleaning
regulary them.
and explain cleaning
regulary them.
Change the inlet valve.
Reconnect it or remove
the causes to make poor
connection.
the causes to make poor
connection.
Change the inlet valve.
3) Reset During operation
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Controller
1. If mains voltage and the drain motor
have no defects a defect of the
controller is highly possible.
controller is highly possible.
Change the controller.
45
5) Water fills continuously or intermittently.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Wrong Installation/Leakage
1. Check whether the drain hose is
laying down on the floor.
(For pump model)
2. Check where water leaks.
Pressure Switch
1. Check the pulsator is rotating when
water fills continuously.
2. If there is no defect in the pressure
swith, check whether the air hole of
the outer tub is blocked.
the outer tub is blocked.
Inlet Valve
1. Does water fills even though it is not
energized (power is off)?
Controller
1. Does water fill immediately after the
power switch turns on before pushing
the start/pause button.
the start/pause button.
Drain hose
laying down.
laying down.
Water leaks
from a part.
from a part.
It doesn’t
rotate.
rotate.
Blocked.
Water fills.
Wrong installation.
Defect of the part.
Water pressure is
not sensed.
not sensed.
Air hole blocked.
Defect of the inlet
valve.
valve.
Short circuit of the
triac of the
controller.
triac of the
controller.
The drain hose
should be hung on the
stand-pipe or the tub.
should be hung on the
stand-pipe or the tub.
Change the part.
Repair it.
Check the tube of the
pressure swith,if it is bent
or blocked, repair that.
pressure swith,if it is bent
or blocked, repair that.
Repair the blocked hole.
Change the inlet valve.
Change the controller.
4) Water doesn’t come into the wash bowl.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Pressure Switch
1. Is there PE error on the display
which means pressure switch error
2. Check frequency of the pressure
switch without load if wash is
proceeding without filling.
proceeding without filling.
Controller
1. Defect of controller is highly possible
if inlet valve and pressure switch have
no defects in the above.
if inlet valve and pressure switch have
no defects in the above.
Reconnect the connector
or change leads. Change
the pressure switch if coil
is open.
or change leads. Change
the pressure switch if coil
is open.
Change the pressure
switch.
switch.
Change the controller.
PE Error
displayed.
displayed.
Less then
26.2
26.2
kHz
Connector is taken
off, or lead or coil is
open.
off, or lead or coil is
open.
Defect of the
pressure switch.
pressure switch.
46
6) Display “LE” message and doesn’t work
Where, what & how to check?
Result of Check
Possible Cause How to repair & settle
1. In initial state display “LE” message.
1) Measure voltage of hall sensor
asm.
2) Check resistance of the motor.
Gray-White
DC 15V
DC 15V
OV
Gray-Red
-Blue
DC 12V
OV
Normal
Resistance
Resistance
No defect
Poor
No defect
Poor
Motor coil is
open.
open.
Contact defect of
the leak.
the leak.
Change the PCB Asm
Change the PCB Asm
Change the motor
Remove the cause
Brown
Hall sensor
assembly
assembly
DC 15V
In PCB assembly
Yellow (Ground)
Blue
Red
47
7) Water does not drain.
Where, what & how to check?
Result of Check
Possible Cause How to repair & settle
Drain Pump
1. Check whether there is drain pump
working sound.
2. Check resistance between terminals
if there is no working sound of the
drain pump.
drain pump.
3. Check connection parts of the leads
if there is no working sound and its
resistance is normal.
resistance is normal.
Drain Hose
1. Check whether the drain hose is put
in a narrow space and kinked.
2. Check whether the internal drain
rubber asm is bent.(For Non-pump
model)
model)
3. Check whether the end of the drain
hose submerged into water or
higher than required.
higher than required.
(For non-pump model)
4. Check whether the drain hose is
blocked by foreign objects. It may
happen in case of the hose is a little
kinked.
happen in case of the hose is a little
kinked.
PV Case
(for Non-Pump Model only)
(for Non-Pump Model only)
1. Check whether the PV asm is
blocked by foreign objects.
There is pump
working sound.
working sound.
∞ Ω
Defect in
connection part.
connection part.
Connection part
has no defects.
has no defects.
Kinked.
Bent.
Submerged or
higher than
required.
higher than
required.
Blocked.
Blocked.
Drain pump is
blocked by foreign
objects.
blocked by foreign
objects.
It’s coil is open.
Defect in
connection part.
connection part.
Defect of the
controller.
controller.
Defect of
installation.
installation.
Defect of the drain
rubber asm.
rubber asm.
Defect of
installation.
installation.
Blocked hose.
Disassemble the drain
pump cap and remove
the foreign objects in the
pump casing.
pump cap and remove
the foreign objects in the
pump casing.
Change the drain pump.
Repair defected
connection.
connection.
Change the controller.
Reinstall so that it should
not be kinked.
not be kinked.
Change the drain rubber
asm.
asm.
Re-install so that it can’t
be submerged or not
higher than required.
be submerged or not
higher than required.
Remove the objects and
reinstall so that it can’t be
kinked.
reinstall so that it can’t be
kinked.
Separate the drain motor
from the PV link,
disassemble PV cover
and then remove the
foreign objects within
PV case.
from the PV link,
disassemble PV cover
and then remove the
foreign objects within
PV case.
Check the washer works
normally after repair
and reassembling them.
normally after repair
and reassembling them.
(PV link & drain motor
lever should be
assembled accuratel.)
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