LG WF-T7062DN Service Manual ▷ View online
33
4) Water doesn’t come into the wash bowl.
5) Water fills continuously or intermittently.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Wrong Installation/Leakage
1. Check whether the drain hose is
laying down on the floor.
(For pump model)
2. Check where water leaks.
Ball Pressure Sensor
1. Check the pulsator is rotating when
water fills continuously.
2. If there is no defect in the Ball
Pressure Sensor, check whether the
air hole of the outer tub is blocked.
air hole of the outer tub is blocked.
Inlet Valve
1. Does water fills even though it is not
energized (power is off)?
Controller
1. Does water fill immediately after the
power switch turns on before pushing
the start/pause button.
the start/pause button.
Drain hose
laying down.
laying down.
Water leaks
from a part.
from a part.
It doesn’t
rotate.
rotate.
Blocked.
Water fills.
Wrong installation.
Defect of the part.
Water pressure is
not sensed.
not sensed.
Air hole blocked.
Defect of the inlet
valve.
valve.
Short circuit of the
triac of the
controller.
triac of the
controller.
The drain hose
should be hung on the
stand-pipe or the tub.
should be hung on the
stand-pipe or the tub.
Change the part.
Repair it.
Check the tube of the
Ball Pressure Sensor, it
is bent
or blocked, repair that.
Ball Pressure Sensor, it
is bent
or blocked, repair that.
Repair the blocked hole.
Change the inlet valve.
Change the controller.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Ball Pressure Sensor
1. Is there PE error on the display
which means Ball Pressure Senosr
error
error
2. Check frequency of the Ball
Pressure Sensor without load if
wash is proceeding without filling.
wash is proceeding without filling.
Controller
1. Defect of controller is highly possible
if inlet valve and Ball Pressure
Sensor have no defects in the
above.
Sensor have no defects in the
above.
Reconnect the connector
or change leads. Change
the Ball Pressure Sensor
if coil is open.
or change leads. Change
the Ball Pressure Sensor
if coil is open.
Change the pressure
switch.
switch.
Change the controller.
PE Error
displayed.
displayed.
Less then
26.2
26.2
34
6) Pulsator doesn’t rotate normally.
Where, what & how to check?
Result of Check
Possible Cause How to repair & settle
Pulsator rotates at one
direction.
direction.
1. The Pulsator rotates normally at the
beginning of wash cycle, but is it not
rotate at clockwise direction (locked)
rotate at clockwise direction (locked)
after some wash cycles though there
is motor-working sound?
is motor-working sound?
2. In the case the pulsator doesn’t
rotates either clockwise or
counterclockwise from the beginning
of wash cycle:
counterclockwise from the beginning
of wash cycle:
1) Check resistance of the wash
motor if there is nomotor-working
sound.
sound.
2) Check belt tension & whether the
clutch rotates normally if there is
motor-working sound.
motor-working sound.
3. The pulsator doesn’t rotate at the
directions.
1) Check whether motor rotates at
both directions if there is motor-
working sound when it’s
energized.
working sound when it’s
energized.
2) Check resistance of the motor if
there is no motor-working sound.
Clockwise
rotation locked.
rotation locked.
Resistance
is normal.
is normal.
V-belt is loose.
Clutch locked.
Motor rotates
at both
directions.
at both
directions.
Motor doesn’t
rotates at both
directions.
rotates at both
directions.
Unusual operation.
Defect of
controller or poor
contact of
connectors of
motor leads.
controller or poor
contact of
connectors of
motor leads.
Loose the belt.
Defect of the
clutch.
clutch.
Loose the belt.
The plusator
locked.
locked.
Defect of the
clutch.
clutch.
Defect of the
capacitor.(check
the capacitor
capacitance)
capacitor.(check
the capacitor
capacitance)
Defect of the
motor.
motor.
Motor coil is open.
Contact defect of
the leads.
the leads.
Turn the power off
and on again then that
symptom disappears.
Explain “Don’t run wash
and on again then that
symptom disappears.
Explain “Don’t run wash
only continuously
”.
Change the controller if
there are no contact
defects in the leads of
there are no contact
defects in the leads of
the motor.
Adjust belt tension by
changing motor fixing
location and change the
belt if it is impossible to
adjust belt tension.
changing motor fixing
location and change the
belt if it is impossible to
adjust belt tension.
Change the clutch if the
clutch pulley is locked
when making it rotated
clockwise and
counterclockwise by
hand.
clutch pulley is locked
when making it rotated
clockwise and
counterclockwise by
hand.
Adjust belt tension or
change the belt if it is
impossible to adjust.
change the belt if it is
impossible to adjust.
Remove cause
locking the pulsator
locking the pulsator
Change the clutch.
Change the motor if the
motor is locked when
having its shaft rotated
by hand.
motor is locked when
having its shaft rotated
by hand.
Change the capacitor if
there is no contact defect
in capacitor’s lead
there is no contact defect
in capacitor’s lead
Change the motor.
Remove the causes.
35
6) Pulsator doesn’t rotate normally.
Where, what & how to check?
Result of Check
Possible Cause How to repair & settle
4. Pulsator weakly rotates.
1) Check voltage at the power outlet
where the washer is plugged into.
2) Check capacitance of the
capacitor.
Less than 85%
of rating.
of rating.
Indicating
needle rises and
immediately
indicates
needle rises and
immediately
indicates
stopped after it
The needle
doesn’t move.
doesn’t move.
Lower voltage.
Capacitor is
normal.
normal.
Lack of
capacitance of the
capacitor.
capacitance of the
capacitor.
Capaci tor is fully
discharged.
discharged.
Explain the causes and a
transfomer should be
used if necessary.
transfomer should be
used if necessary.
Change the capacitor.
Change the capacitor.
7) Water does not drain.
Where, what & how to check?
Result of Check
Possible Cause How to repair & settle
Drain Hose
1. Check whether the drain hose is put
in a narrow space and blocked
2. Check whether the internal drain
Rubber assembly is bent.
3. Check whether the end of the drain
hose submerged into water or
higher than required.
higher than required.
Bent.
Submerged or
higher than
required.
higher than
required.
Defect of
installation.
installation.
Defect of the drain
rubber asm.
rubber asm.
Defect of
installation.
installation.
Reinstall so that it should
not be blocked by lint
not be blocked by lint
Change the drain rubber
asm.
asm.
Re-install so that it can
be submerged or not
higher than required.
be submerged or not
higher than required.
By lint accumulation.
Blocked
4.Check whether the drain hose is
Blocked by foreign object. It may
Happen in case of the hose is little
Blocked by lint accumulation.
Blocked by foreign object. It may
Happen in case of the hose is little
Blocked by lint accumulation.
Blocked
Blocked hose
Accumulation
Remove the objects and
Reinstall so that it can’t be
Blocked by lint accumulation.
Reinstall so that it can’t be
Blocked by lint accumulation.
36
7) Water does not drain.
Where, what & how to check?
Result of Check
Possible Cause How to repair & settle
PV Case
1. Check whether the PV asm is
blocked by foreign objects.
Drain Motor
1. Check resistance of the drain
motor if it can not pull the PV link.
Blocked.
Resistance is
normal.
normal.
Drain motor coil is
open.
open.
Contact defect in
connection parts
or defect of the
controller.
connection parts
or defect of the
controller.
Separate the drain motor
from the PV link,
disassemble PV cover
and then remove the
foreign objects within
PV case.
from the PV link,
disassemble PV cover
and then remove the
foreign objects within
PV case.
Check the washer works
normally after repair
and reassembling them.
normally after repair
and reassembling them.
(PV link & drain motor
lever should be
assembled accuratel.)
Change the drain motor
Check the washer
works normally after
reassembling.
(PV link & drain motor
reassembling.
(PV link & drain motor
lever should be
assembled accurately.)
assembled accurately.)
Change the controller if
there is no defects in the
connection parts.
there is no defects in the
connection parts.
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