LG WT-R1340TH Service Manual ▷ View online
32
4-6. TROUBLE SHOOTING METHODS ACCORDING TO ERROR MESSAGE
For more detailed information for trouble shooting refer to page 37 to 45.
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.
“NO DRAIN”
lamp blinks
lamp blinks
• Laundry unbalance
during spin.
“UE” display and
singnal continuously
ringing
singnal continuously
ringing
• 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 (WHITE) 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(ORANGE or PINK) 4 pin
connector
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.
33
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
Current
Error
Error
• Connector the PRESSURE S/W
ASM or RED(ORANGE or PINK) 4
pin connector to P.W.B ASM has
bad connection.
pin connector to P.W.B ASM has
bad connection.
• PRESSURE S/W is bad.
(In the initial state of QC TEST MODE,
For WT-R80(5)1
the number on the DISPLAY is less
than 63 or more than 70
Except
for WT-R80(5)1
the number on the DISPLAY is
less than 60 or more than 104)
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(GREEN) 3 Pin or
Natural 6 Pin connector to P.W.B
ASM had bad connection
Natural 6 Pin connector to P.W.B
ASM had bad connection
• Hall sensor is bad.
• Locked by Bearing Housing
• Locked by Bearing Housing
• IPM is bed
• Motor is short
• Motor is short
• 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.
• Change PWB ASM
• Change Stator ASM
• Change Stator ASM
34
4-7. 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.
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
(AC100~127V : 125V 12A)
delay type) CAUTION
Check the fuse rating
AC220~240V:250V 8A
(AC100~127V : 125V 12A)
Change the controller
if all the electrical parts
have no defects.
if all the electrical parts
have no defects.
35
2) Defects on displaying function
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
if the extended outlet is used and
voltage at the electrical outlet
is normal in the above.
Controller
1. Defect of LED.
2. Defect of LED driving circuit.
3. Defect of micom.
2. Defect of LED driving circuit.
3. Defect of micom.
Less than 85%
of the rating.
of the rating.
Less than 85%
of the rating
of the rating
Low voltage.
The dia of the lead
wire is smaller or
many loads are
connected at the
same outlet
wire is smaller or
many loads are
connected at the
same outlet
Defect of controller.
To explain that it is
caused by low voltage in
electric supply and
recommend using a
transfomer if voltage has
been continuously low.
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.
having a enough
capacity if using
a transfomer.
Change the controller.
3) Reset During operation
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Mains Voltage
1. Measure voltage of the outlet that the
washer is plugged into during wash and
spin.
spin.
2. Reset symptom happens at specific
time zone repeatedly.
3. Check whether a transfomerlent
power cut happens.
(Fluorescent lamp is
transfomeriently blinked.)
(Fluorescent lamp is
transfomeriently blinked.)
Less than
80% of the rating.
80% of the rating.
Mains voltage is too
low or size of a lead
wire is too small.
low or size of a lead
wire is too small.
External noise
inrushed.
inrushed.
Explain that it is caused
by low voltage in electric
mains and recommend
using a suitable size of
leads.
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)
using environment.
(It happens when
equipment with high
frequency is used
around)
Explain it is a problem of
electric supply
environment.
electric supply
environment.
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