WFW1532EK - LG Washing Machine Service Manual (repair manual). Page 43

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Where, what & how to check?

Result of Check

Possible Cause

How to repair & settle

1. Measure mains voltage at the wall outlet

2. Meaure voltage at the extended
outlet that the washer is plugged in
if the extended outlet is used and
voltage at the electrical outlet
is normal in the above.

1. Measure the secondary voltage of the

transfomer.

1. Defect of LED.
2. Defect of LED driving circuit.
3. Defect of micom.

Less than 85% of the
rating 

Less than 85% of the

rating 

Less than AC 10V

Low voltage

The dia of the lead wire is
smaller or many loads are
connected at the same
outlet

Defect of the transfomer

Defect of controller.

Change the controller.

Change the controller.

To explain that it is
caused by low voltage in
electric supply and
recommend using a
transfomer if voltage has
been continuously low.

To use a transfomer
having a enough capacity
if using a transfomer.

Where, what & how to check?

Result of Check

Possible Cause

How to repair & settle

1. Measure voltage of the outlet that the

washer is plugged into during wash and
spin.

2. Reset symptom happens at specific time

zone repeatedly.

3. Check whether a transfomerlent power

cut happens. (Fluorescent lamp is
transfomeriently blinked)

Less than 80% of the
rating.

Mains voltage is too low
or size of a lead wire is
too small.

External noise inrushed.

Explain that it is caused
by low voltage in electric
mains and recommend
using a suitable size of
leads.

Explain it is caused by
using environment.
(It happens when
equipment with high
frequency is used
around)

Explain it is a problem of
electric supply
environment.