LG WF-SA12HD6 Service Manual ▷ View online
41
Display
Problem Diagnosis
Standard
Estimated Cause of
Abnormal Condition
Action
Water supply problem
(When water is not
supplied)
• When it did not reach the
RESET level frequency
(26.0kHz) in 12 minutes
after starting the water
supply
• If the level frequency is
less than 26.0kHz, and if
the level frequency is not
changed for 10 minutes
1. When the faucet is locked or
frozen
2. When the tap water supply is
stopped
3. When the filter at the top of the
water supply valve is blocked
with foreign object
4. When the connector connected
to the water supply valve is
disconnected or contact is
defect
5. When the natural colored 4 pin
connector connected to
controller is fallen off or contact
is defect
6. Problem in the load drive part in
the controller
7. Problem with pressure switch
pressure detection
• Open the faucet for water
supply
• Wash when the water
supply condition is met
• Clean or replace the filter
• Reconnect the connector
or correct the contact
defect
• Reconnect the connector
or correct the contact
defect
• Replace controller
• Check pressure switch
Discharge problem
(When it is not
discharged)
• When it did not reach the
RESET level frequency
discharge (26.0kHz) in 12
minutes after starting the
discharge
1. When the discharge hose is not
lowered
2. When the discharge hose is
bent or clogged (Clogged by
freezing or by foreign object)
3. When the connector connected
to the discharge pump/drain
valve or the blue 3PIN connector
connected to the controller is
fallen off or contact is defect
4. When the discharge pump/
drain valve unit is defect. (When
a separate 220V/110V power is
directly connected to the 3PIN
connector of the discharge
motor, it still does not work)
5. When there is a problem in the
controller assy
• Put down the discharge
hose
• Remove the cause of the
clogging of the discharge
hose
• Reconnect the connector
or correct the contact
defect connector
• Replace discharge motor
• Replace controller
Dehydration problem
(When dehydration is
not working)
• Unbalance of the laundry
during the dehydration
1. When the laundry is not evenly
placed in the (INNER TUB ASM)
and skewed to one side
2. When the washer is installed on
a slope
• Distribute the laundry
evenly in the washer but
(horizontal)
• Adjust the leg heights for
the washer to be leveled.
4-5. TROUBLESHOOTING WITH ERROR CODE
42
Display
Problem Diagnosis
Standard
Estimated Cause of
Abnormal Condition
Action
Lid open
(When the lid cannot
be locked)
• When the door cannot be
locked
• When the door cannot be
open
1. When there is a foreign object
in the lid lock hole
2. when lid lock unit is defect
3. When the connector connected
to the lid lock is fallen off or
contact is defect
4. When the hook is defect
5. When the lid is defect
6. When the controller is defect
• Remove the foreign object
in the lid lock hole
• Replace the lid lock
• Reconnect the connector
or correct the contact
defect
• Replace the lid
• Replace the lid
• Replace the controller
Lid locked
(When the lid cannot
be locked)
• When the door cannot be
locked
• When the door cannot be
open
1. When there is a foreign object in
the lid lock hole
2. When lid lock unit is defect
3. When the connector connected
to the lid lock is fallen off or
contact is defect
4. When the hook is defect
5. When the lid is defect
6. When the controller is defect
• Remove the foreign object
in the lid lock hole
• Replace the lid lock
• Reconnect the connector
or correct the contact
defect
• Replace the lid
• Replace the lid
• Replace the controller
Level sensor problem
(When there is a
problem with the level
sensor)
• When the frequency
generated by recognizing
level height in the pressure
switch goes out of the
standard boundary (It occurs
when the condition of the
level frequency less than
20.0KHz or over 30.0KHz is
maintained for 5 sec. or more)
1. When the connector connected
to the pressure switch or the
blue 6 pin connector is fallen off
or contact is defect
2. When the pressure switch unit
is defect
3. When the controller id defect
• Reconnect the connector
or correct the contact
defect
• Replace pressures witch
• Replace controller
•
Motor locking problem
(When there is a
problem with the motor)
• When there is a problem
with the hole sensor
detecting the rotation of
the motor
• It occurs when the motor is
locked
1. When the connector connected
to hole sensor or blue 4 pin
connector is fallen off or contact
is defect
2. When the hole sensor unit is
defect
3. When the controller is defect
4. When the motor connection
connector is fallen off or contact
is defect
5. When the bearing is locked
6. Hole sensor location defect
• Reconnect the connector or
correct the contact defect
• Replace hole sensor
• Replace controller
• Reconnect the connector or
correct the contact defect
• Turn the inner tub with hand
to check the status, and if it
cannot be rotated, replace the
bearing housing assy.
• Replace hole sensor
Clutch problem
(When there is a
problem in the clutch)
• When the clutch is not
working
1. Connection part contact defect
2. Coupling damaged
3. Pulsator locked
• Check the connection part
reconnection defect and
correct
• Disassembly the Motor and
check the damage of the
coupling (If it is damaged,
replace the part)
• Check the pulsator locking by
foreign object (Remove the
foreign object)
43
Display
Problem Diagnosis
Standard
Estimated Cause of
Abnormal Condition
Action
Coin stuck
(When there is a
problem with the motor
due to foreign object)
• Occurs when motor is
locked
1. When foreign object such as
coin, pin, or clip entered the
washing plate
• Remove the coin or foreign
object stuck between the
washer vane with pliers,
etc.
THERMISTOR
• Thermistor has a bad
connection or failed
• Check the connections at the
Thermistor and at the WHITE
3-pin connector at the main
board
• Test thermistor to determine it is
not detective
• Reseat the connector.
• Replace the thermistor if
necessary.
Power
Failure
ERROR
• The washer experienced a
power failure
• When occurred a power failure.
• When the power cord is fallen
off suddenly.
• Restart the cycle.
• Reconnect the power cord.
Drain Valve Problem
• When drain valve is not
working
• Connection part contact defect
• Check the connection part
reconnection defect and
correct.
• Replace the new drain
valve.
OVER
FLOW
ERROR
• When water is overflowed • Check the valves to be sure
there is no input leakage. Then
check the drain hose and make
sure the drain pipe is between
0.9 ~ 1.2 m (36 and 48 inches)
above the floor.
• Check for blockages and leaks
in the air hose between the tub
and the pressure switch.
• Check and repair any air
leakages at the air hose
connector on the outer tub and
at any connecting parts.
• Install the drain hose
between 0.9 ~ 1.2 m (36
and 48 inches) above the
floor.
• Replace pressure sensor
switch
• Remove the foreign
objects in pressure sensor
switch air hose.
44
4-6. 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.
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
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