LG WM2550HVCA Service Manual ▷ View online
28
NO
YES
NO
NO
YES
NO
YES
YES
NO
NO
YES
YES
YES
NO
NO
NO
YES
SOFTENER
MAX
Is water supply shut-off?
Is the tap opened?
When you press both
CUSTOM PROGRAM
button and
PRE-WASH
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
VALVE ASSEMBLY 0.8-1.2
kΩ
?
Verify the voltage of the inlet valve connector is
120 V AC.
(Refer to 7-2 QC TEST MODE)
Is water supplied?
Are receptacles correctly connected to the
terminals of the INLET VALVE ASSEMBLY?
terminals of the INLET VALVE ASSEMBLY?
Has detergent been put in the correct compartment
of the dispenser?
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.
ASSEMBLY.
Check electrical connection.
Replace the MAIN PWB
ASSEMBLY.
Replace the MAIN PWB
ASSEMBLY.
Refer to
「
NO WATER SUPPLY
」
Check the wiring.
Put the detergent in the
correct place.
correct place.
Clean the dispenser.
NO WATER SUPPLY
DETERGENT DOES NOT FLOW IN
Prewash
Hot water
Main wash
Steam
Bleach
Prewash
Hot water
Main wash
Steam
Bleach
29
SOFTENER
MAX
SOFTENER
MAX
ABNORMAL SOUND
LIQUID DETERGENT/SOFTENER/BLEACH DOES NOT FLOW IN
Secure the bolt.
Replace the STATOR
ASSEMBLY or ROTOR
ASSEMBLY.
ASSEMBLY or ROTOR
ASSEMBLY.
Refer to
「NO WATER SUPPLY 」
Check the wiring on the
dispenser.
dispenser.
Put it in the correct
compartment.
compartment.
Clean the Cap and
Container.
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?
the INLET VALVE ASSEMBLY?
Is liquid detergent/softener/bleach put in the correct
compartment of the drawer?
compartment of the drawer?
Is the liquid detergent/softener/bleach cap clogged?
Prewash
Hot water
Main wash
Steam
Bleach
30
Replace the
SENSOR SWITCH
ASSEMBLY.
SENSOR SWITCH
ASSEMBLY.
Replace the MAIN PWB
ASSEMBLY.
ASSEMBLY.
Repair the DRAIN HOSE
ASSEMBLY.
ASSEMBLY.
Remove foreign material.
Reconnect or repair the
connector
connector
Replace the DRAIN
PUMP ASSEMBLY.
PUMP ASSEMBLY.
Replace the MAIN PWB
ASSEMBLY.
ASSEMBLY.
When
pressingDELAY WASH and SOIL LEVEL
at the same time after draining, is the water level
frequency 255?
When pressing
frequency 255?
When pressing
WASH/RINSE and DELAY WASH
buttons at the same time while washing, is the water
level frequency between 230 - 243 ?
level frequency between 230 - 243 ?
Check the voltage between two pins while pressing
the POWER button. Is the voltage 120 V AC?
the POWER button. Is the voltage 120 V 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)
(resistance of the coil is 10-20 Ω)
When checking voltage between connectors during
spin, is the voltage 120 V AC as in the figure?
HEATING WITHOUT WATER
DRAIN MALFUNCTION
31
Extra Hot: 70 °C
DELAY WASH and
WASH TEMP. button
BL
WH
WH
WH
WH
RD
BL
BL
BL
OR
1
2
RD
BL
2
1
Blue
Red
Black
Yellow
(1)
BL
WH
WH
WH
WH
RD
BL
BL
BL
OR
RD
BL
Push the THERMISTOR
tightly to the rubber.
tightly to the rubber.
Replace the
Heater Assembly
Heater Assembly
When checking the THERMISTOR on the tub,
is the THERMISTOR loose?
is the THERMISTOR loose?
Water Temperature [°C]
HEATING CONTINUOUSLY ABOVE
THE SETTING WATER TEMPERATURE
WASH HEATER TROUBLE
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