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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?

Is the inlet valve filter clogged?

Is resistance between each terminal of INLET
VALVE ASSEMBLY 0.8-1.2 

k

Ω

?

Verify the voltage of the inlet valve connector is 

120-127V AC.

(Refer to 7-2 QC TEST MODE)

Is water supplied?

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

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

Is the detergent caked or hardened?

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.

5

4

Bleach

5

4

Dry

Bleach

Dry

Softener

cap

Secure the bolt.

Replace the STATOR
ASSEMBLY or ROTOR
ASSEMBLY.

Refer to

NO WATER SUPPLY

Check the wiring on the 
dispenser.

Put it in the correct
compartment.

Clean the Cap and
Container.

Is the motor bolt loosened?

Is there friction noise coming from the motor?

Is water supplied?

Are the plugs correctly connected to the terminals of
the INLET VALVE ASSEMBLY?

Is liquid detergent/softener/bleach put in the correct
compartment of the drawer?

Is the liquid detergent/softener/bleach cap clogged?

Replace the
SENSOR SWITCH
ASSEMBLY.

When pressing WASH/RINSE and SOIL LEVEL at
the same time after draining, is  the water level
frequency 255?  
When pressing WASH/RINSE and SOIL LEVEL
buttons at the same time while washing, is the water
level frequency between 230 - 243 ?

Replace the MAIN PWB
ASSEMBLY.

Check the voltage between two pins while pressing
the POWER button. Is the voltage 

220-240 V AC?

Repair the DRAIN HOSE
ASSEMBLY.

Is the drain hose twisted or frozen?

Remove foreign material.

Is the impeller of the drain pump clogged?

Reconnect or repair the
connector

Is the connector disconnected, disassembled?

Replace the DRAIN
PUMP ASSEMBLY.

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

Replace the MAIN PWB
ASSEMBLY.

When checking voltage between connectors during
spin, is the voltage 120 V AC as in the figure? 

9-1. FILTER ASSEMBLY (LINE FILTER)

9. COMPONENT TESTING INFORMATION

When Resistance (Ohm) checking the Component, be sure to turn the power off,
and do voltage discharge sufficiently.

Test Points

Result

WH (1) to RD (3)

WH (3) to RD (1)

0 

Ω

0 

Ω

(3)
(1)

WH1

(3)

(1)

RD1