LG WF-5471TTM / WF-5573TTM / WF-5745SPM.AOWECOL Service Manual ▷ View online
40
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.
1. The Pulsator rotates normally at the
beginning of wash cycle, but is it not
rotate at clockwise direction (locked)
after some wash cycles though there
is motor-working sound?
2. In the case the pulsator doesn’t
rotates either clockwise or
counterclockwise from the beginning
of wash cycle:
1) Check resistance of the wash
1) Check resistance of the wash
motor if there is no motor-working
sound.
2) Check belt tension & whether the
clutch rotates normally if there is
motor-working sound.
3. The pulsator doesn’t rotate at both
directions.
1) Check whether motor rotates at
1) Check whether motor rotates at
both directions if there is motor-
working sound when it’s
energized.
2) Check resistance of the motor if
there is no motor-working sound.
Clockwise
rotation locked.
Resistance
is normal.
V-belt is loose.
Clutch locked.
Motor rotates
at both
directions.
Motor doesn’t
rotates at both
directions.
Normal
resistance.
Unusual operation.
Defect of
controller or poor
contact of
connectors of
motor leads.
Loose the belt.
Defect of the
clutch.
Loose the belt.
The plusator
locked.
Defect of the
Defect of the
clutch.
Defect of the
Defect of the
capacitor.(check
the capacitor’s
capacitance)
Defect of the
Defect of the
motor.
Motor coil is open.
Contact defect of
the leads.
Turn the power off
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
the motor.
Adjust belt tension by
changing motor fixing
location and change the
belt if it is impossible to
adjust belt tension.
Change the clutch if the
Change the clutch if the
clutch pulley is locked
when making it rotated
clockwise and
counterclockwise by
hand.
Adjust belt tension or
Adjust belt tension or
change the belt if it is
impossible to adjust.
Remove cause
Remove cause
locking the pulsator
Change the clutch.
Change the clutch.
Change the motor if the
motor is locked when
having its shaft rotated
by hand.
Change the capacitor if
Change the capacitor if
there is no contact defect
in capacitor’s lead
Change the motor.
Change the motor.
Remove the causes.
41
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.
Indicating
needle rises and
immediately
indicates
The needle is
stopped after it
is raised.
The needle
The needle
doesn’t move.
Lower voltage.
Capacitor is
normal.
Lack of
capacitance of the
capacitor.
Capacitor is fully
Capacitor is fully
discharged.
Explain the causes and a
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 Pump
1. Check whether there is drain pump
working sound.
2. Check resistance between terminals
if there is no working sound of the
drain pump.
3. Check connection parts of the leads
if there is no working sound and its
resistance is normal.
Drain Hose
1. Check whether the drain hose is put
in a narrow space and kinked.
2. Check whether the internal drain
rubber asm is bent.(For Non-pump
model)
3. Check whether the end of the drain
hose submerged into water or
higher than required.
(For non-pump model)
There is pump
working sound.
Defect in
connection part.
Connection part
Connection part
has no defects.
Kinked.
Bent.
Submerged or
higher than
required.
Drain pump is
blocked by foreign
objects.
It’s coil is open.
It’s coil is open.
Defect in
connection part.
Defect of the
Defect of the
controller.
Defect of
installation.
Defect of the drain
rubber asm.
Defect of
installation.
Disassemble the drain
pump cap and remove
the foreign objects in the
pump casing.
Change the drain pump.
Change the drain pump.
Repair defected
connection.
Change the controller.
Reinstall so that it should
not be kinked.
Change the drain rubber
asm.
Re-install so that it can’t
be submerged or not
higher than required.
42
7) Water does not drain.
Where, what & how to check?
Result of Check Possible Cause How to repair & settle
4. Check whether the drain hose is
blocked by foreign objects. It may
happen in case of the hose is a little
kinked.
PV Case
(for Non-Pump Model only)
1. Check whether the PV asm is
blocked by foreign objects.
Drain Motor
(For Non-Pump Model only)
1. Check resistance of the drain
motor if it can not pull the PV link.
Blocked.
Blocked.
Resistance is
normal.
Blocked hose.
Drain motor coil is
open.
Contact defect in
connection parts
or defect of the
controller.
Remove the objects and
reinstall so that it can’t
be kinked.
Separate the drain motor
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.
(PV link & drain motor
lever should be
assembled accuratel.)
Change the drain motor
Check the washer
works normally after
reassembling.
(PV link & drain motor
lever should be
assembled accurately.)
Change the controller if
there is no defects in the
connection parts.
43
8) Water drains though it is not the time of drain.
Where, what & how to check?
Result of Check Possible Cause How to repair & settle
Drain Motor
(for Non-Pump Model only)
1. Check whether the drain motor is
normally returned after turning
power off.
(It is considered normal if the lever
of the drain motor is fully pulled out
by the PV spring)
PV Case
1. If water drains though the drain
motor is normally returned, check
whether PV asm is blocked by
foreign objects or the bellows in
the PV asm is deformed.
Controller
1. Check whether the drain motor or
the drain pump works immediately
after power is turned on.
Blocked.
Blocked.
Bellows
deformed.
Works.
Defect of the drain
motor.
Defect of PV
Bellows.
Defect of the
controller(Triac
defect)
Change the drain motor.
Remove the objects in
the PV asm.
Change the PV bellows.
Change the PV bellows.
(The bellows may swell
up if it contact petroleum
or petrochemical
substance because it is
made of rubber)
Change the controller.
9) Drain error happens while water drains normally .
Where, what & how to check?
Result of Check Possible Cause How to repair & settle
Ball Pressure Sensor
(Pressure Switch)
1. Check generation frequency of the
Ball Pressure Sensor
(Pressure Switch) without water.
Less than
26.3 kHz
26.3~27.1 kHz
Defect of the
Ball Pressure
Sensor(Pressure
Switch).
Defect of the
controller.
Change the Ball
Pressure Sensor
(Pressure Swtich)
Change the controller.
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