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Troubleshooting With Error - LG WM2901H*A Series Service Manual

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8-4. TROUBLESHOOTING WITH ERROR

INLET VALVE ERROR
Is
displayed?
Yes
When you press both
WASH/RINSE button and
DELAY WASH button
simultaneously,
is the water level frequency
below 24.6 kHz?
No
Is filter inlet valve clogged
with foreign material?
No
Is the connector connected to
inlet valve assembly
disconnected or
disassembled?
No
Is resistance between
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 kΩ?
(Refer to 9-5 inlet valve
assembly.)
Yes
Check the AIR
CHAMBER
Yes
and the tube
(clogged).
Clean or
Yes
replace the filter.
Reconnect or
Yes
repair
the connector.
Replace the
INLET VALVE
No
ASSEMBLY.
Is the voltage of the inlet
valve connector 120 V AC?
(Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)
No
Is the connector connected to
MAIN PWB assembly
disconnected or dis-
assembled?(NA2, NA4, BL3)
No
Is Electrical connection
correct?
(Refer to 9-5 wiring diagram)
Yes
After checking connector,
is the water level frequency
below 24.6 kHz?
No
Replace the MAIN PWB
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
a possible misuse of hot and cold water
6) No water supply hose leakage
26
Replace the
Yes
INLET VALVE
ASSEMBLY.
Reconnect or
Yes
repair
the connector.
Replace the
No
MAIN HARNESS.
Check the
Yes
PRESSURE
SWITCH.

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