LG WF-T9030TDW Service Manual ▷ View online
37
4-7. 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
38
4-8. TROUBLE SHOOTING METHODS ACCORDING TO ERROR MESSAGE
For more detailed information for trouble shooting refer to page 46 to 57.
ERROR DECISION
CAUSE FOR ERROR
BASIS
OCCURRENCE
REMEDY
ERROR
• WATER LEVEL
does not rise to the
set level in 40
minutes.
set level in 40
minutes.
• Water is not
completely drained
in 10 minutes.
in 10 minutes.
• Laundry unbalance
during spin.
• In the second QC
Mode the following
message is displayed.
message is displayed.
WATER
SUPPLY
& INLET
V/V.
DRAINAGE
UNBALANCE
OVER
FLOODING
ERROR
• Water faucet is closed?
• Water supply is interrupted.
• Water supply is interrupted.
• Inlet V/V is clogged with dirts.
• Connector has bad contact to
• Connector has bad contact to
the inlet valve.
• Yellow(YL) 2 pin connector has
bad contact to the P.W.B ASM.
• Is the drain hose located
properly?
• Drain hose is not lowered.
• Drain hose is folded or clogged
due to freeze or dirts.
• Bad Drain Motor part or
WHITE(WH) 2 pin connector to
the P.W.B ASM has bad
connection.
the P.W.B ASM has bad
connection.
• Laundry in the INNER TUB is
filled unevenly.
• Washer is tilted.
• S.F S/W is too closed to the
• S.F S/W is too closed to the
washing tub, or has bad contact.
• Is the CONNECTOR of Ball
pressure sensor disconnected
or badly tonched?
or badly tonched?
• Check INLET valve
• Open water faucet.
• Wait until water supply is
• Wait until water supply is
resumed.
• Clean or replace filter.
• Correct the connector contact.
• Correct the connector contact.
• Same as above.
• Hung up drain hose at 0.9~1.3m
high. (For pump)
• Put the hose lower.
(For : Non-pump)
• Unclog the drain hose.
• Replace Drain Motor or correct
the connector contact.
• Try to fill laundry uniformly in the
inner tub.
• Adjust the leg.
• Check and replace S.F S/W.
• Check and replace S.F S/W.
• Check B.P SENSOR
CONNECTOR or replace B.P
sensor
sensor
39
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.
• AUTO OFF relay
S/W is out of order.
• In the second QC
MODE, the following
message is
displayed.
message is
displayed.
DOOR
OPEN
PRESSURE
SENSOR
AUTO
OFF
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
more than 70)
(In the initial state of QC TEST
MODE, the number on the
DISPLAY is less than 63 or
more than 70)
• BLUE(BL) 1pin connector to
P.W.B ASM has bad connection.
• 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).
• Correct the connector contact.
• Change P.W.B ASM.
• Change P.W.B ASM.
• Adjust or replace those parts.
• Correct the connectors contact.
40
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 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
switch turned on
2. Check the secondary voltage of the
transfomer.
3. Measure resistance to check
whether the T.P of the motor is
blown out.
4. Check whether the fuse is open.
Controller
If there are no defects in the above,
it should be defect of the controller.
If supply voltage is 120% higher than
it should be defect of the controller.
If supply voltage is 120% higher than
rating the varistar in the controller may
be broken. Check supply voltage.
Poor
Around rating
0V
0V
Less than 1
Male & female
connectors
separated
Less than 0.5
More than 1.0
10~14V
0V
0V
motor is hot
Open
Over 120%
voltage than
rating check
Defect of the
electrical
No defect
Defect of household
No defect
Defect of household
power supply
No defect
Open circuit of the
Open circuit of the
power supply cord
Poor connection.
Wire is opened.
No defect
Poor contact
Poor contact
No defect
Coil is open
Coil is open
T.P blown out
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.
Remove cause to
overload the motor
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
Change the controller
if all the electrical parts
have no defects.
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