Read LG 41729 Service Manual online
2 5
8-4. TROUBLESHOOTING WITH ERROR
INLET VALVE ERROR
Is displayed?
When you press both
WASH/RINSE button and
DELAY STRAT button
simultaneously,
is the water level < 246?
WASH/RINSE button and
DELAY STRAT button
simultaneously,
is the water level < 246?
Is filter inlet valve clogged
with foreign material?
with foreign material?
Check the connectors at the
main PCB and the water
valve. Are the connectors
loose or disconnected?
main PCB and the water
valve. Are the connectors
loose or disconnected?
Proceed to next step at right.
Is the resistance of fill valve
coil between 800 and
1200 Ω?
coil between 800 and
1200 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 at the inlet
valve coil 120VAC with the
valve energized?
valve coil 120VAC with the
valve energized?
Replace the
INLET VALVE
ASSEMBLY.
INLET VALVE
ASSEMBLY.
No
Yes
Yes
Is the wiring correct? Refer to
the wiring diagram for correct
connections.
the wiring diagram for correct
connections.
(Refer to 9-5 wiring diagram)
Replace the
MAIN HARNESS.
MAIN HARNESS.
No
No
Is the water level still < 246?
Replace the MAIN PWB
ASSEMBLY.
ASSEMBLY.
ALWAYS CHECK FOR EXTERNAL CAUSES
Water supply shut off
Frozen water lines
Kinked fill hose
Low water pressure
Water supply shut off
Frozen water lines
Kinked fill hose
Low water pressure
Check the
pressure
switch. Refer to
test #2.
pressure
switch. Refer to
test #2.
Yes
No
No
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