LG WT-W7111TH Service Manual ▷ View online
28
10-10. Replacement of Main Controler
Assembly.
Disconnect all housings in lead wire assembly.
Pull out the main controller assembly as shown.
Be care of hurt your hands.
In assembling, the “A” & “B” part should be
checked.
Fig.27
Fig.28
Fig.29
29
11.TROUBLE SHOOTING METHODS ACCORDING TO DISPLAYED
ERROR MODE
ERROR DECISION BASIS AND CHECKING METHODS
ERROR DECISION
CAUSE FOR ERROR
BASIS
OCCURRENCE
REMEDY
ERROR
• Water level does not
rise to the set level in
30 minutes.
30 minutes.
“NO INLET”
lamp blinks
• Water is not
completely drained in
12 minutes.
12 minutes.
“OE” display
and/or
“NO DRAIN”
lamp blinks.
and/or
“NO DRAIN”
lamp blinks.
•Laundry unbalance
during spin.
“UE” display and
singnal rings 60
times and/or
“NO DRAIN”
lamp blinks.
singnal rings 60
times and/or
“NO DRAIN”
lamp blinks.
• LID is opened in the
course of intermittent
spin, normal spin or
processing reservation.
spin, normal spin or
processing reservation.
• SIGNAL continuously
ringing.
“DOOR OPEN” lamps
blinks.
blinks.
WATER
SUPPLY
SUPPLY
DRAINAGE
UNBALANCE
DOOR
OPEN
OPEN
• Water faucet is closed?
• Water supply is interrupted.
• Inlet V/V is clogged with dirts.
• Connector has bad contact to
the inlet valve.
• Natural 4 pin connector has
bad contact to the P.W.B ASM.
• Is the drain hose located
properly?
• Drain hose is folded or clogged
due to freeze or dirt.
• Bad Drain Pump part or
BLUE (BL) 3 pin connector to
the P.W.B ASM has bad
connection.
connection.
• Laundry in the INNER TUB is filled
unevenly.
• Washer is tilted.
• Lid is opened during
intermittent spin or normal spin?
• Lid is opened while processing
reservation?
• Connector to the Reed S/W or
RED(RD) 4 pin connector
to the P.W.B ASM has bad
connection.
connection.
• Open water faucet.
• Wait until water supply is
resumed.
• Clean or replace filter.
• Correct the connector contact.
• Same as above.
• Hung up drain hose at 0.9~1.2m
high. (For pump)
• Put the drain hose lower (For non-pump)
• Unclose the foreign objects within
• Unclose the foreign objects within
drain hose.
• Replace drain pump or correct
the connector contact.
• Try to fill laundry uniformly in the
inner tub.
• Adjust the leg.
• Closed the lid.
• Closed the lid.
• Correct the connector contact.
• Check and replace Lead Wire Asm.
30
ERROR DECISION
CAUSE FOR ERROR
BASIS
OCCURRENCE
REMEDY
ERROR
• Water Pressure Switch
is off.
• AUTO OFF relay S/W
is out of order.
PRESSURE
SENSOR
AUTO OFF
OVER
FLOODING
ERROR
FLOODING
ERROR
MOTOR
ERROR
ERROR
• Connector the PRESSURE S/W
ASM or RED(RD) 4 pin connector
to P.W.B ASM has bad connection.
to P.W.B ASM has bad connection.
• PRESSURE S/W is bad.
(In the initial state of QC TEST
MODE, the number on the
DISPLAY is less than 60 or more
than 104)
MODE, the number on the
DISPLAY is less than 60 or more
than 104)
• Check water leakage or
whether the drain hose is hung
on to drainage which is 0.9 m
obove from floor.
on to drainage which is 0.9 m
obove from floor.
• Check blockage of air hole or
air tube.
• Check & repair air leakage at
the air hole of outer tub the air
tube or connection parts.
• Connector the HALL Sensor or
Natural 6 Pin connector to P.W.B
ASM had bad connection .
ASM had bad connection .
• Connector the stator ASM, and
YELLOW(YL) 3 Pin or Natural 6
Pin connector to P.W.B ASM had
bad connection
Pin connector to P.W.B ASM had
bad connection
• Hall sensor is bad.
• Locked by Bearing Housing
• Locked by Bearing Housing
• Correct the connector contact.
• Replace PRESSURE S/W ASM.
• Change P.W.B ASM.
• Hang drain hose which is
minimum 0.9m above from floor.
• Replace pressure sensor
switch
• Remove the foreign objects in
pressure sensor switch
• Correct the connect contact.
• Change Stator ASM.
• Change Bearing Housing ASM.
• Change P.W.B ASM.
• Change Stator ASM.
• Change Stator ASM.
• Change Bearing Housing ASM.
• Change P.W.B ASM.
• Change Stator ASM.
31
12.HOW TO DIAGNOSE AND REPAIR BY SYMPTOMS
12-1. 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.
both the plug pins short-circuited.
2. Check whether every connector in
the bundle of connectors has a
good connection.
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. 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
0V
Less than 1
Male & female
connectors
separated
connectors
separated
Less than 0.5
More than 1.0
10~14V
0V
0V
Open
Over 120%
voltage than
rating check
voltage than
rating check
Defect of the
electrical
electrical
No defect
Defect of household
power supply
power supply
No defect
Open circuit of the
power supply cord
power supply cord
Poor connection.
Wire is opened.
No defect
Poor contact
No defect
Coil is open
Defect of the fuse
Change the electrical.
Call for power supply
company
company
Change the power
supply cord.
supply cord.
Remove the cause to
give strain and
reconnect them.
give strain and
reconnect them.
Change the lead wire.
Change the Auto Off
Switch
Switch
Change the
transfomerformer.
Change the fuse.(time
delay type) CAUTION
Check the fuse rating
AC220~240V:250V 8A
(AC110~127V : 125V 12A)
delay type) CAUTION
Check the fuse rating
AC220~240V:250V 8A
(AC110~127V : 125V 12A)
Change the controller
if all the electrical parts
have no defects.
if all the electrical parts
have no defects.
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