LSWF388HVS - LG Washing Machine Service Manual (repair manual). Page 17

5-4. Explanation of each process

No.

Process

Explanation

1.

Stay

• Electrical power is supplied.
• Washer is ready to work and the micom is in the active mode.  

2.

Water
supply

• After loading laundry and selecting a course and a cycle, water is

supplied and  drum rotates.

• When a user selects  Pre-wash course, water is supplied through pre

wash valve.

3.

Soaking
and washing
laundry

• To get laundry wet, drum rotates clockwise and counterclockwise.
• If water amount is insufficient at this time, the Inlet valve will supply

water again.

4.

Heating and
washing

• The heater heats the water in drum to the selected water temperature

and drum rotates for washing.

5.

6.

Washing
and heating
/ washing

• When the water temperature reaches to the selected temperature,

the heating stops and only the drum rotates.

• If water temperature becomes lower than selected because of

re-supplied water, the heating starts again.

7.

Washing

• Fuzzy logic decides washing time according to the laundry load, water

temperature, and other factors.

8.

Drainage

• A pump motor drains the water from the drum.
• After sensing drained water amount by water level frequency, spin starts.
• When a heating course is selected, stay cooling process is performed to

decrease the water temperature gradually to prevent laundry from being
damaged and for safety reasons.

9.

Untangling
(Sensing
eccent-
ricity)

• It balances laundry load and senses the eccentricity of the load, to only

allow spinning without vibration.

• If the eccentricity is worse than the allowed level, it repeats the

disentangling process. When the repeated time is more than allowed
level, it displays UE.

• If the eccentricity is good, the intermittent spin starts.
• During this process, the drain pump works for drainage intermittently.