LG 41025 Service Manual ▷ View online
24
8-3. TROUBLESHOOTING SUMMARY
CIRCUIT DIAGRAM
25
26
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 1?
coil between 800 and
1200 1?
(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
27
DRAIN ERROR
Is displayed?
Check the connectors at the
main PCB and the drain
pump. Are the connectors
loose or disconnected?
main PCB and the drain
pump. Are the connectors
loose or disconnected?
Reconnect or
repair
the connector.
repair
the connector.
Yes
Circulation pump
Yes
Drain pump
Connection connector
No
No
When you press both
WASH/RINSE button and
DELAY START button
simultaneously, is the
water level <250?
WASH/RINSE button and
DELAY START button
simultaneously, is the
water level <250?
Proceed to next step at right
Check the air
dome and
pressure hose
for clogging.
Check the
pressure
switch. See
test #2.
dome and
pressure hose
for clogging.
Check the
pressure
switch. See
test #2.
Measure the resistance of
the drain pump motor. Is
the resistance between 101
and 201 ?
the drain pump motor. Is
the resistance between 101
and 201 ?
(Refer to 9-4 Pump motor
assembly.)
assembly.)
Replace the
DRAIN PUMP
ASSEMBLY.
DRAIN PUMP
ASSEMBLY.
Yes
Yes
Check the voltage between
the main PCB connectors
NA4-1 BN and BL3-1 BK. Is
the voltage 120 VAC ± 5%?
the main PCB connectors
NA4-1 BN and BL3-1 BK. Is
the voltage 120 VAC ± 5%?
TO TURN ON THE DRAIN PUMP:
1. Turn on the washer
2. Press the SPIN SPEED button to select LOW
speed.
3. Press the START/PAUSE button.
The drain pump will be energized for several
minutes at the beginning of the spin cycle.
ALWAYS CHECK FOR EXTERNAL CAUSES
Kinked or clogged drain hose
Frozen drain hose
Foreign objects clogging the drain pump filter
Foreign objects caught in pump impeller
Kinked or clogged drain hose
Frozen drain hose
Foreign objects clogging the drain pump filter
Foreign objects caught in pump impeller
Replace the
MAIN PWB
ASSEMBLY.
MAIN PWB
ASSEMBLY.
No
No
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