How To Diagnose And Repair By Symptom - LG WT-H800 Service Manual

4-8. HOW TO DIAGNOSE AND REPAIR BY SYMPTOM

1) Washer is not energized.
Where, what & how to check?
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.
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
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.
Result of Check
Poor Defect of the electrical
Around rating No defect
0 V Defect of household
power supply
No defect
Less than 1
Open circult of the power
supply cord
Poor connection
Male & female
connectors separated
Wire is opened.
Less than 0.5
No defect
More than 1.0
Poor contact
10~14 V No defect
0 V
Coil is open
Defect of the fuse
Open
Over 120% voltage
than rating check
42
Possible Cause
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 AUTO OFF
Switch
Change the
transfomerformer.
Change the fuse.
CAUTION
Check the fuse rating
AC100~127V:125V 12A
AC220~240V:250V 6A
Change the controller if all
the electrical parts have no
defects.
How to repair & settle