LG WT-H9556 Service Manual ▷ View online
ERROR DECISION
CAUSE FOR ERROR
BASIS
OCCURRENCE
REMEDY
ERROR
• LID is opened in the
course of
intermittent spin,
normal spin or
processing
reservation.
intermittent spin,
normal spin or
processing
reservation.
• SIGNAL
continuously ringing.
• Water Pressure
Switch is off.
• AC motor has a bad
connection or failed
• In the second QC
MODE, the following
message is
displayed.
displayed.
DOOR
OPEN
PRESSURE
SENSOR
AC, MOTOR
(CLUTCH
MOTOR)
LAUNDRY
AMOUNT
SENSOR
• Lid is opened during intermittent
spin or normal spin?
• Lid is opened while processing
reservation?
• Connector to the S.F S/W or
VIOLET(VL) 2 PIN
CONNECTOR to the P.W.B ASM
has bad connection.
CONNECTOR to the P.W.B ASM
has bad connection.
• S.F S/W or BALL PRESSURE
SENSOR is bad or bad contact.
• Is placed magnetic in LID-B?
• Connector the Ball Pressure
Sensor(Pressure Switch) or
BLUE(BL) 3 pin connector to
P.W.B ASM has bad connection.
BLUE(BL) 3 pin connector to
P.W.B ASM has bad connection.
• Ball Pressure Sensor
(Pressure Switch) is bad.
(In the initial state of QC TEST
MODE, the number on the
DISPLAY is less than 63 or
(In the initial state of QC TEST
MODE, the number on the
DISPLAY is less than 63 or
more than 70)
• Check the connections at the AC
motor and at the WHITE 6-pin
connector at the main board.
Test AC motor or coupling to
determine it is not detective.
• Check MOTOR, CLUTCH,
V-BELT, CONDENSOR.
• Check over all connectors if
they have bad connection.
• Closed the lid.
• Closed the lid.
• Correct the connector contact.
• Check and replace S.F S/W or
BALL PRESSURE SENSOR.
• Change the LID-B.
• Correct the connector contact.
• Replace Ball Pressure
Sensor(Pressure Switch).
• Reseat the connector.
Replace the AC motor if
necessary.
Replace the coupling or Clutch
housing if necessary.
•
• Adjust or replace those parts.
• Correct the connectors contact.
Clutching is failed
-.Coupling get out of
gear.
-.Coupling is broken.
•
•
•
40
41
4-8
. TROUBLE SHOOTING AGAINST COMMON WASHING PROBLEMS
Many washing problems involve poor soil & stain removal, residues of lint and scum, and fabric damage. For
satisfactory washing results, follow these instructions.
WASH PROBLEM
Possible Causes
Problems
Solutions & Preventive Measures
• Use correct amount of Detergent for load size, amount of soil
and water Hardness.
• Use WARM or HOT water for normal soil.
Different Water Temperature may be required according to soil
type.
• Reduce load size.
• Wash with JEAN or Soak(SPEEDY SOAK) & JEAN wash cycle
for heavy soiled laundry.
• Separate heavily soiled items from lightly soiled ones.
• Pretreat stain and heavy soil according to directions shown on
page 11.
• Rub the stain with bar soap. Wash.
• Do not overfill fabric softener dispenser and do not pour liquid
fabric softener directly onto fabric.
See page 14 for more instructions.
• Keep the recommendations against Scrud(waxy buildup). (refer
to scrud page14.)
• Use correct amount of Detergent for load size, amount of soil
and water Hardness.
• To restore discolored load of whites, use rust remover safe for
fabric.
• Install nonprecipitating water softener or an iron filter in your
water supply system for an ongoing problem.
• Before washing, run water for a few minutes to clear lines.
• Wash lint givers eg towels, flannelette sheets, separately from lint
• Wash lint givers eg towels, flannelette sheets, separately from lint
collectors eg synthetic fabrics and remove tissues in pockets
before wash. See page 11 for sorting and caring before loading.
• Do not overload the washer
• Do not overload the washer.
• Some Detergents need to be pre-dissolved, check the Detergent
instructions. Try pre-dissolving the Detergent.
• Increase Water Temperature using HOT water safe for fabric.
• Use proper amount of Detergent.
• Never pour chlorine bleach directly on fabric.
See page 13 for adding liquid bleach.
• Fasten zippers, hooks, and buckles.
• Remove objects in pockets. See page 11 for caring before
loading.
• Do not overload the washer.
Poor soil
removal
removal
• Not enough Detergent
• Wash Water Temperature
too low.
• Overloading the washer
• Incorrect wash cycle
• Incorrect sorting
• Do not pretreat stain
• Undiluted fabric softener
dispensed directly onto
fabric
• A buildup caused by the
interaction of fabric softener
and Detergent can flake off
and mark clothes
• Not enough Detergent
• Iron or manganese in
• Iron or manganese in
water supply, water pipes,
or water heater
• Incorrect sorting
• Tissues left in pocket
• Overloading the washer
• Overloading the washer
• Undissolved Detergent
• Use too much Detergent
• Incorrect use of chlorine
bleach.
• Unfastened zippers,
hooks, buckles
• Ribs, tears and broken
threads
• Overloading the washer
• Degradation of fabric
Blue Stains
Holes, tears,
or snags
or snags
Black or gray
marks on
clothes
marks on
clothes
Yellow or
brown rust
stains
brown rust
stains
Lint
Residue or
Detergent
Detergent
4-9. HOW TO DIAGNOSE AND REPAIR BY SYMPTOM
1) Washer is not energized.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Household Power supply
1. Check whether connection between the
plug and the electrical is poor
2. Measure voltage of the electrical.
Wiring of the Washer
1. Measure resistance between both ends
1. Measure resistance between both ends
of the power supply cord with both the
plug pins short-circuited.
2. Check whether every connector in the
bundle of connectors has a good
connection.
3. Check resistance of every wire to find
out a open wire.
Electrical component
1. Check resistance with power relay
1. Check resistance with power relay
switch turned on
2. Check the secondary voltage of the
transfomer.
3. Check whether the fuse is open.
Controller
If there are no defects in the above,
it should be defect of the controller.
Poor
Around rating
0 V
Less than 1
∞
Male & female
connectors separated
∞
Less than 0.5
More than 1.0
10~14 V
0 V
Open
Over 120% voltage
than rating check
Change the controller if all
the electrical parts have no
defects.
Defect of the electrical
No defect
Defect of household
power supply
No defect
Open circult of the power
Open circult of the power
supply cord
Poor connection
Wire is opened.
No defect
Poor contact
No defect
Coil is open
Coil is open
Defect of the fuse
Change the electrical.
Call for power supply
company
Change the power supply
cord.
Remove the cause to give
strain and reconnect
them.
Change the lead wire
Change the lead wire
Change the AUTO OFF
Switch
Change the
transfomerformer.
Change the fuse.
transfomerformer.
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
42
2) Defects on displaying funcion
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Main voltage
1. Measure mains voltage at the wall outlet
2. Meaure voltage at the extended outlet
that the washer is plugged in if the
extended outlet is used and voltage at
the electrical outlet is normal in the
above.
Controller
1. Defect of LED.
1. Defect of LED.
2. Defect of LED driving circuit.
3. Defect of micom.
Less than 85% of the
rating
Less than 85% of the
rating
Low voltage
The dia of the lead wire is
smaller or many loads are
connected at the same
outlet
Defect of controller.
Change the controller.
To explain that it is
caused by low voltage in
electric supply and
recommend using a
transfomer if voltage has
been continuously low.
To use a transfomer
having a enough capacity
if using a transfomer.
3) Reset During operation
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Main voltage
1. Measure voltage of the outlet that the
washer is plugged into during wash and
spin.
2. Reset symptom happens at specific time
zone repeatedly.
3. Check whether a transfomerlent power
cut happens. (Fluorescent lamp is
transfomeriently blinked)
Controller
1. If mains voltage and the drain motor
have no defects a defect of the controller
is highly possible.
Less than 80% of the
rating.
Mains voltage is too low
or size of a lead wire is
too small.
External noise inrushed.
Explain that it is caused
by low voltage in electric
mains and recommend
using a suitable size of
leads.
Explain it is caused by
using environment.
(It happens when
equipment with high
frequency is used
around)
Explain it is a problem of
electric supply
environment.
Change the controller.
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