LG WF-HD120S Service Manual page 43

4-8-1. TROUBLESHOOTING WITH ERROR
INLET VALVE ERROR
Is displayed?
Yes
When you press both Water
level button and Spin button
simultaneously,
is the water level frequency
below 26.0 kHz?
Is filter inlet valve clogged
with foreign material?
Is the connector connected to
inlet valve assembly
disconnected or
disassembled?
Is resistance between
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 k ?
Yes
Check the AIR
CHAMBER
Yes
and the tube
(clogged).
No
Clean or
Yes
replace the filter.
No
Reconnect or
repair
Yes
the connector
No
Replace the
INLET VALVE
No
ASSEMBLY.
Is the voltage of the inlet
valve connector 12V DC ?
( Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)
No
Is the connector connected to
MAIN PWB assembly dis-
connected or disassembled?
(RD6)
No
Yes
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
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Replace the
Yes
INLET VALVE
ASSEMBLY
Reconnect or
Yes
repair
the connector
Replace the
No
MAIN HARNESS
Check the
Yes
PRESSURE
SWITCH