Read LG WM2550HVCA Service Manual online
19
INLET VALVE ERROR
Is displayed?
When you press both
WASH/RINSE
WASH/RINSE
button and
DELAY WASH
button
simultaneously,
is the water level frequency
is the water level frequency
below 24.6 kHz?
Is filter inlet valve clogged
with foreign material?
with foreign material?
Is the connector connected to
inlet valve assembly
disconnected or
disassembled?
inlet valve assembly
disconnected or
disassembled?
Is resistance between
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 k
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 k
Ω?
(Refer to 9-5 inlet valve
assembly.)
assembly.)
Clean or
replace the filter.
replace the filter.
Check the AIR
CHAMBER
and the tube
(clogged).
CHAMBER
and the tube
(clogged).
Yes
No
No
Yes
Yes
Reconnect or
repair
the connector.
repair
the connector.
Replace the
INLET VALVE
ASSEMBLY.
INLET VALVE
ASSEMBLY.
Yes
Yes
Is the voltage of the inlet
valve connector 120 V AC?
(Check the all terminal of
valve connector 120 V AC?
(Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)
while the power is on.)
Replace the
INLET VALVE
ASSEMBLY.
INLET VALVE
ASSEMBLY.
No
Yes
Is the connector connected to
MAIN PWB assembly
disconnected or dis-
assembled?(NA2, NA4, BL3)
MAIN PWB assembly
disconnected or dis-
assembled?(NA2, NA4, BL3)
Reconnect or
repair
the connector.
repair
the connector.
No
Yes
Yes
Is Electrical connection
correct?
correct?
(Refer to 9-5 wiring diagram)
Replace the
MAIN HARNESS.
MAIN HARNESS.
No
No
After checking connector,
is the water level frequency
is the water level frequency
below 24.6 kHz?
Replace the MAIN PWB
ASSEMBLY.
ASSEMBLY.
[Note] Environmental safety check list
1) No water tap leakage
2) No water tap freeze
3) No entanglement of water supply hose
4) No water shortage
5) No shrinkage on water supply hose due to
1) No water tap leakage
2) No water tap freeze
3) No entanglement of water supply hose
4) No water shortage
5) No shrinkage on water supply hose due to
a possible misuse of hot and cold water
6) No water supply hose leakage
Check the
PRESSURE
SWITCH.
PRESSURE
SWITCH.
Yes
No
No
8-4. TROUBLESHOOTING WITH ERROR
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