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Frozen hose

- Wet a towel with warm 

water and apply to inlet 

hose.

Frozen pump

- Supply warm water into the 

tub up to the bottom rubber

part.

Visit to service.

Is                  displayed?

Visit to service.

Warm it up

Is hose or pump frozen?

Frozen hose or pump

8-2.FAULT DIAGNOSIS AND TROUBLE SHOOTING

1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.

CAUTION

Is the supplied voltage 220-240V AC?

Is the voltage between the 2 FILTER ASSEMBLY
connectors 220-240V AC?

Is the LED (1) on?

Are the connectors (2) on the PWB loose?

Is wire of the DISPLAY PWB ASSEMBLY
broken?

Replace DISPLAY PWB ASSEMBLY
or repair wire.

Check the fuse or reset
the circuit breaker.

Replace the FILTER
ASSEMBLY (CIRC).

Replace MAIN PWB
ASSEMBLY.

Reconnect.

Replace the MAIN PWB
ASSEMBLY.

1

2

3

1

2

3

Is water supplied?

Are receptacles correctly connected to the
erminals of the INLET VALVE ASSEMBLY?

Has detergent been put in the correct compartment
of the dispenser?

Is the detergent caked or hardened?

Is water supply shut-off?

Is the tap opened?

When you press both SPIN button and RINSE
button simultaneously, is the water level frequency
below 246?

Open the tap.

Check the AIR CHAMBER
and the tube (clogged).

Clean the filter.

Replace the INLET VALVE
ASSEMBLY.

Check electrical connection.
Replace the MAIN PWB
ASSEMBLY.

Refer to

NO WATER SUPPLY

Check the wiring.

Put the detergent in the
correct place.

Clean the dispenser.

Is the inlet valve filter clogged?

Is resistance between each terminal of INLET

VALVE ASSEMBLY 0.8-1.2

?

Verify the voltage of the inlet valve connector is

220-240V AC.

(Refer to 7-2 QC TEST MODE)

When pressing Rinse and Spin at the same
time after draining, is the water level frequency 255?
When pressing Rinse and Spin buttons 
at the same time while washing, is the water level 
frequency between 239 - 250 ?

Check the voltage between two pins while pressing
the POWER button. Is the voltage 220-240V AC?

Is the drain hose twisted or frozen?

Is the impeller of the drain pump clogged?

Is the connector disconnected, disassembled?

Is the coil of the drain pump too high or low?
(resistance of the coil is 10-20 

Ω)

When checking voltage between connectors during
spin, is the voltage 220-240V AC as in the figure?

Replace the
SENSOR SWITCH
ASSEMBLY.

Replace the MAIN PWB
ASSEMBLY.

Repair the DRAIN HOSE
ASSEMBLY.

Remove foreign material.

Reconnect or repair the
connector

Replace the DRAIN
PUMP ASSEMBLY.

Replace the MAIN PWB
ASSEMBLY.