LG T1449TEFT1 / T1503TEF1 Service Manual ▷ View online
37
4-7. 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.
• Water is not
completely drained
in 10 minutes.
• Laundry unbalance
during spin.
• In the second QC
Mode the following
message is displayed.
WATER
SUPPLY
& INLET
V/V.
DRAINAGE
UNBALANCE
OVER
FLOODING
ERROR
• Water faucet is closed?
• Water supply is interrupted.
• Inlet V/V is clogged with dirts.
• 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.
• Laundry in the INNER TUB is
filled unevenly.
• Washer is tilted.
• 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?
• Check INLET valve
• 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 0.9~1.3m
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 B.P SENSOR
CONNECTOR or replace B.P
sensor
38
ERROR DECISION
CAUSE FOR ERROR
BASIS
OCCURRENCE
REMEDY
ERROR
• LID is opened in the
course of
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.
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.
• 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.
• 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)
• 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.
• Adjust or replace those parts.
• Correct the connectors contact.
39
4-8. 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. Measure resistance to check
whether the T.P of the motor is
blown out.
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
rating the varistar in the controller may
be broken. Check supply voltage.
rating the varistar in the controller may
be broken. Check supply voltage.
Poor
Around rating
0V
Less than 1
Male & female
connectors
separated
connectors
separated
Less than 0.5
More than 1.0
10~14V
0V
motor is hot
Open
Over 120%
voltage than
rating check
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
T.P blown out
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.
Remove cause to
overload the motor
overload the motor
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
Change the controller
if all the electrical parts
have no defects.
if all the electrical parts
have no defects.
40
2) Defects on displaying function
3) Reset During operation
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.
Transfomer
1. Measure the secondary voltage of
the transfomer.
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
Less than
AC 10V
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 the
transfomer.
transfomer.
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.
Change the controller.
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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