LG WT-H9556 Service Manual ▷ View online
Where, what & how to check?
Where, what & how to check?
Where, what & how to check?
9) Drain error happens while water drains normally.
Result of Check
Possible Cause
How to repair & settle
Pressure Switch
1. Check generation frequency of the
pressure switch without water.
Less than 26.3 kHz
26.3~27.1 kHz
Defect of the pressure
switch.
Defect of the controller.
Change the pressure switch.
Change the controller.
10) Spining is going on even though the lid is open.
Result of Check
Possible Cause
How to repair & settle
Lid Switch
1. Check resistance between both
terminals of the lid switch with the lid
open.
0~9
Ω
∞ Ω
Contact points of the lid
switch is welded.
Defect of the controller.
Change the lead wire
assembly.
Change the controller.
8) Water drains thought it is not the time of drain.
Result of Check
Possible Cause
How to repair & settle
Drain Hose
1. Check whether the drain hose is
installed properly so that the discharge
hight is about 0.9~1.2m from the floor.
The discharge height
is lower than
recommendation.
Wrong installation of the
drain hose.
Put the outlet of drain hose
between 0.9m and 1.2m
48
11) Vibration, Noise or Unbalance Error happens during spin.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Using conditions such as
installation etc.
1. Check whether the washer is leveled.
(Check clearance with out tub and out
case the left gap is the same as the right
and the rear gap is 1.5~2 time bigger
than the front gap, between the cabinet
and the wash bowl, when it is leveled.)
2. Check whether laundry in the wash bowl
is out of balance that can cause severe
vibration &noise.
3. Check whether the puisator doesn’t
rotate during spin. (To check that,
remove the front lid and than run the
spin only cycle.)
Suspension
1. Check whether the outer tub cover hit
the top cover without load during spin.
Not leveled.
Laundry is
unbalanced.
The pulsator rotates
initially then the inner
tub rotates.
Hit
It is very important to find out what kinds of noise & where comes from to settle noise during spin and accumulately
service experiance.
Defect of installation
Defect of the clutch
Defect of the Suspension
Level the washer.
Explain that it is not out of
order and it may happen
when big &long laundry is
washed.
Change the clutch spring-B
or the clutch asm.
Change four suspensions
simultaneously.
(In assembling, check the
position to suspension asm)
12) Power is automatically turned off during operation or immediately turning on
the power button.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Defect in mains
Explain the cause
(It happens specially when a
high frequency equipment is
a used around the washer or
in the case voltage fluctuation
is big.)
Mains voltage
1. It is mostly caused by noise from mains
or transient power cut.
49
Problems
Stop/Reset the sensor:Stop or reset the sensor by entering Test mode.
12) Power is automatically turned off during operation or immediately turning on
the power button.
Where, what & how to check?
Result of Check
Possible Cause
How to repair & settle
Auto Power Relay or Controller
1. Check whether power is automatically
turned off when turning on the power
switch after unplugging the power cord
from the outlet.
2. It would be defect of the controller if
power is automatically tumed off
immediately when turning on the power
switch even though there is no defects
in the power switch.
Automatically tumed
off
Mechanical defect of the
power switch
Change the switch.
Change the controller.
13) Sensor
(1) Malfunction
Result of Check
How to repair & settle
Assembling the not- calibrated
controller.
Short
The sensor is automatically stopped by
the accumulated foreign materials.
Sensor is out of order
• If the value is not within 1~26 by
checking the controller group.
• When checking the value of the
electrode sensor by Test mode
during the operation
(washing,rinsing, spinning etc.) of the
washing machine, the sensed value
has no change.
• The difference between the sensing
value measured from the supplied
water by a jig and the sensor value of
the product is 5 or more..
• Temperature sensor fault : “ ”
displayed Check the operation of
temperature sensor by the QC test
mode.
Recalibrate or replace the controller.
Check the harness, clean the electrode of
sensor
Stop the sensor working*
Change the sensor, clean the electrode of
sensor
Stop the sensor working*
Change the sensor or controller
Check the Harness
50
(2) Inaccurate detecting
(3) How to change Controller Group
Problems
Result of Check
How to repair & settle
the accumulated foreign materials on
the sensor
Inaccurate detecting
• The difference between the sensing
value measured from the supplied
water by a jig and the sensor value of
the product is 5 or more..
• If the value measured from the jig is
normal but the consumer is not
satisfied with
Change the sensor, clean the electrode of
sensor Stop the sensor working*
Change the group of the controller by
entering Test mode.**
**
- If a user wants to detect a Detergent more than the current one
:Increase the group value (by 1~2 step)
- If a user wants to detect a Detergent less than the current one
:Decrease the group value (by 1~2 step)
Turn the power switch on by pressing WASH +PROGRAM and Reservation button together.
Initial Test mode display : All LEDs are off, except I-SENSOR LED
Display the number of TR calibration times : Display “ 0 ” means not calibrated, “ 1 ” for the first time and so on.
The buzzer sounds if there is no controller group.
1. Press Program button once:Display the current Controller Group (1~26)
Program button again :Decrease the controller group by one (display the changed group)
Program button to decrease by one
2. Press START/PAUSE button once :Display the current Controller Group (1~26)(1~26)
Press START/PAUSE button again :increase the controller group by one
(display the changed group)
START/PAUSE button to increase by one
51
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