LG WT-H9556 Service Manual ▷ View online
5) Water fills continuously of 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
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.
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.
Drain hose laying
down.
Water leaks from a
part.
It doesn’t rotate.
Blocked.
Water fills.
Wrong installation.
Defect of the part.
Water pressure is not
sensed.
Air hole blocked.
Defect of the inlet valve.
Short circuit of the
triac of the controller.
The drain hose should be
hung on the stand-pipe or
the tub.
Change the part.
Repair it.
Repair it.
Check the tube of the Ball
Pressure Sensor (Pressure
Switch), it is bent or blocked,
repair that.
Repair the blocked hole.
Change the inlet valve.
Change the controller.
45
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
OV
Gray - Red
-Blue
DC 12V
OV
Normal Resistance
No defect
Poor
No defect
Poor
Motor coil is open.
Contact defect of the leak.
Change the PCB Asm
Change the PCB Asm
Change the motor
Remove the cause
Brown
Hall sensor
assembly
DC 15V
In PCB assembly
Black / (Ground) White
Blue
Red
46
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.
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 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.
There is pump
working sound.
working sound.
∞ Ω
Defect in connection
part.
part.
Connection part has
no defects.
no defects.
Kinked.
Blocked.
Drain pump is blocked by
foreign objects.
foreign objects.
It’s coil is open.
Defect in connection part.
Defect of the controller.
Defect of installation.
Blocked hose.
Disassemble the drain
pump cap and remove the
foreign objects in the pump
casing.
Change the drain pump.
Change the drain pump.
Repair defected connection.
Change the controller.
Reinstall so that it should
not be kinked.
not be kinked.
Remove the objects and
reinstall so that it can’t
be kinked.
reinstall so that it can’t
be kinked.
8) Water drains thought it is not the time of drain.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
PV Case
1. If water drains though the drain motor is
normally returned, check whether PV
asm is blocked by foreign objects or the
bellows in the PV asm is deformed.
Controller
1. Check whether the drain motor or the
drain pump works immediately after
power is turned on.
Blocked.
Bellows deformed.
Works.
Defect of PV Bellows.
Defect of the controller
(Triac defect)
Remove the objects in the
PV asm.
Change the PV bellows.
Change the PV bellows.
(The bellows may swell up if
it contact petroleum or
petrochemical substance
because it is made of rubber)
Change the controller.
47
Where, what & how to check?
Where, what & how to check?
Where, what & how to check?
9) Drain error happens while water drains normally.
Result of Check
Possible Cause
How to repair & settle
Pressure Switch
1. Check generation frequency of the
pressure switch without water.
Less than 26.3 kHz
26.3~27.1 kHz
Defect of the pressure
switch.
Defect of the controller.
Change the pressure switch.
Change the controller.
10) Spining is going on even though the lid is open.
Result of Check
Possible Cause
How to repair & settle
Lid Switch
1. Check resistance between both
terminals of the lid switch with the lid
open.
0~9
Ω
∞ Ω
Contact points of the lid
switch is welded.
Defect of the controller.
Change the lead wire
assembly.
Change the controller.
8) Water drains thought it is not the time of drain.
Result of Check
Possible Cause
How to repair & settle
Drain Hose
1. Check whether the drain hose is
installed properly so that the discharge
hight is about 0.9~1.2m from the floor.
The discharge height
is lower than
recommendation.
Wrong installation of the
drain hose.
Put the outlet of drain hose
between 0.9m and 1.2m
48
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