DOWNLOAD LG WD-1260FHD Service Manual ↓ Size: 4 MB | Pages: 40 in PDF or view online for FREE

8-2.FAULT DIAGNOSIS AND TROUBLESHOOTING

1. Be careful of electric shock or disconnecting the parts while troubleshooting.

2. First of all, check the connection of each part terminal with wiring diagram.

3. If you replace the MAIN PWB ASSEMBLY, put in the connectors correctly.

NO

NO

YES

YES

YES

NO

NO

YES

MAIN PWB ASSEMBLY

MAIN PWB ASSEMBLY

(1)

(2)

Check the fuse?

Replace MAIN PWB
ASSEMBLY

Reconnect the PWB
ASSEMBLY

Reconnect the PWB
ASSEMBLY

When measuring the voltage of the outlet, 

is the voltage AC 220-240V?

Is the led (1) on?

Is connector (2)  disconnected or

disassembled?

Is wire of the PWB ASSEMBLY disconnected?

Replace PWB ASSEMBLY

NO POWER

CAUTION

NO

YES

NO

NO

YES

NO

YES

YES

NO

NO

YES

YES

YES

NO

NO

NO

YES

Wiring diagram

MAX

Option (Hot)

Option (Hot)

Is water supply shut-off?

Is the tap opened?

When you press both Rinse button and Spin button
simultaneously, is the water level frequency below
240?

Is the inlet valve filter clogged with impurity?

Is resistance between each terminal of INLET
VALVE ASSEMBLY is 2~8

k

?

Check the voltage of the inlet valve connector 

220 - 240V~.

(Refer to 7-2 QC TEST MODE)

Is water supplied?

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

Is detergent put in the correct compartment of
the drawer?

Is the detergent caked or hardened?

Open the tap.

Check the AIR CHAMBER
and the tube clogged 
with impurity. 

Clean the filter.

Replace the INLET VALVE

ASSEMBLY.

Replace the MAIN PWB

ASSEMBLY

Refer to 

NO WATER SUPPLY

Check the wiring on the

dispenser.

Put the detergent in the

correct position 

PRE+MAIN

MAIN WASH

: Detergent 

Clean the drawer.

NO WATER SUPPLY

DETERGENT DOES NOT FLOW IN

MAIN

WASH

SOFTENER

PRE -

WASH

YES

YES

NO

NO

NO

NO

YES

YES

YES

YES

Wiring diagram

MAX

Option (Hot)

MAX

max

ABNORMAL SOUND

SOFTENER DOES NOT FLOW IN

Fix the bolt tightly.

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
drawer.

Is the motor bolt loosened?

Is there friction noise from the motor?

Is water supplied?

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

Is softener put in the correct compartment of the

drawer?

Is the softener cap clogged?

Rinse

Spin

220-240V

NO

YES

YES

YES

YES

NO

NO

NO

NO

YES

YES

NO

MAIN PWB ASSEMBLY

MAIN PWB ASSEMBLY

2 1

Replace the

S.PRESSURE SWITCH

ASSEMBLY

Replace the MAIN PWB
ASSEMBLY

Repair the DRAIN HOSE 

ASSEMBLY.

Remove foreign material.

Reconnect or repair the 

connector

Repair the DRAIN PUMP 

ASSEMBLY.

Repair the MAIN PWB 

ASSEMBLY.

When pressing Rinse and Spin at the same time after
draining, is  the water level frequency 252 or more?  
When pressing Rinse, Spin buttons at the same time
while wash, is the water level frequency between 
230 - 243 ?

Checking voltage between two pins as press the
POWER button is the voltage  220 - 240V~?

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 cut-off?

(resistance of coil is 90~160 )

When checking voltage between connectors

( ,  ) on spinning, is the voltage 220 - 240V~ 

as the figure?

HEATING WITHOUT WATER

DRAIN MALFUNCTIONING