LG WT-R9070TH / WT-R9075TH Service Manual ▷ View online
40
4-8. TROUBLE SHOOTING METHODS ACCORDING TO ERROR MESSAGE
4-8-1. SAFETY CAUTION
-
4-8-
- 2. ERROR MODE SUMMERY
• If you press the START/PAUSE button when an error is displayed, any error except will disappear and
the machine will go into the pause status.
• In case of , if the error is not resolved within 20 seconds, or the in case of other errors, if the
error is not resolved within 4 minutes, power will be turned off automatically and the error code will blink. But in
the case of , power will not be turned off.
the case of , power will not be turned off.
• Clutch Motor defect
CLUTCH ERROR
7
• Door not all the way closed.
DOOR OPEN
ERROR
ERROR
6
• The PRESSURE SENSOR ASSEMBLY is out of
order.
• When water level frequency maintain condition of below 10 kHz
and over 30 kHz
PRESSURE
SENSOR
ERROR
SENSOR
ERROR
5
• Water is overflowing
(water level frequency is over 21.3kHz).
※
※
If
FE is displayed, the drain pump will
operate to drain the water automatically.
OVERFLOW
ERROR
ERROR
4
• Not fully drained within 10 minutes.
DRAIN ERROR
3
• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
UNBALANCE
ERROR
ERROR
2
• Correct water level (24.6kHz) is not reached within 8
minutes after water is supplied or it does not
reach the preset water level within 25 minutes.
reach the preset water level within 25 minutes.
WATER INLET
ERROR
ERROR
1
CAUSE
SYMPTOM
ERROR
• Clutch Motor defect
CLUTCH ERROR
7
• Door not all the way closed.
DOOR OPEN
ERROR
ERROR
6
• The PRESSURE SENSOR ASSEMBLY is out of
order.
• When water level frequency maintain condition of below 10 kHz
and over 30 kHz
PRESSURE
SENSOR
ERROR
SENSOR
ERROR
5
• Water is overflowing
(water level frequency is over 21.3kHz).
※
※
If
FE is displayed, the drain pump will
operate to drain the water automatically.
OVERFLOW
ERROR
ERROR
4
• Not fully drained within 10 minutes.
DRAIN ERROR
3
• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
UNBALANCE
ERROR
ERROR
2
• Correct water level (24.6kHz) is not reached within 8
minutes after water is supplied or it does not
reach the preset water level within 25 minutes.
reach the preset water level within 25 minutes.
WATER INLET
ERROR
ERROR
1
CAUSE
SYMPTOM
ERROR
■
There’s built-in AC 120V and DC power in output terminal of PWB assembly in common. Be careful electric
shock when disconnecting parts while trouble shooting. (Wear Electro Static Discharge gloves when working.)
■
After cutting off the power when changing PWB assembly, disconnect or assemble.
■
Be careful static when handling PWB assembly, and use Electro Static Discharge plastic pack
when delivering or keeping it.
41
4-8. TROUBLE SHOOTING METHODS ACCORIDNG TO ERROR MESSAGE
• The connector (3-pin, male, white) in the MOTOR HARNESS is not
connected to the connector(3-pin, female, white) of STATOR
ASSEMBLY.
ASSEMBLY.
• The electric contact between the connectors (3-pin, male, white) in
the MOTOR HARNESS and 4-pin, female, white connector in the
MAIN PWB ASSEMBLY is bad or unstable.
MAIN PWB ASSEMBLY is bad or unstable.
• The MOTOR HARNESS between the STATOR ASSEMBLY and
MAIN PWB ASSEMBLY is cut (open circuited).
• The hall sensor is out of order/defective.
LOCKED
MOTOR
ERROR
MOTOR
ERROR
8
CAUSE
SYMPTOM
ERROR
• The connector (3-pin, male, white) in the MOTOR HARNESS is not
connected to the connector(3-pin, female, white) of STATOR
ASSEMBLY.
ASSEMBLY.
• The electric contact between the connectors (3-pin, male, white) in
the MOTOR HARNESS and 4-pin, female, white connector in the
MAIN PWB ASSEMBLY is bad or unstable.
MAIN PWB ASSEMBLY is bad or unstable.
• The MOTOR HARNESS between the STATOR ASSEMBLY and
MAIN PWB ASSEMBLY is cut (open circuited).
• The hall sensor is out of order/defective.
LOCKED
MOTOR
ERROR
MOTOR
ERROR
8
CAUSE
SYMPTOM
ERROR
42
4-9 TROUBLESHOOTING SUMMARY
`
Hall Sensor
WH Pin1 : Ha
Pin2 : Hb
Pin3 : GND
Pin4 : +
WH Pin1 : Ha
Pin2 : Hb
Pin3 : GND
Pin4 : +
Inlet Valve
NA_Pin3 : Main wash
BL3 Pin1 : Cold valve
BL4 Pin2 : Hot valve
NA_Pin3 : Main wash
BL3 Pin1 : Cold valve
BL4 Pin2 : Hot valve
Pin4 : Jet valve
Pin5 : Rinse valve
Pin5 : Rinse valve
Pump
CN5 Pin5 : Drain pump
1. Pump running : 120V ± 5%
2. Stopped Motor/Pump : 0 ~ 1V
CN5 Pin5 : Drain pump
1. Pump running : 120V ± 5%
2. Stopped Motor/Pump : 0 ~ 1V
Pin1 to Pin2 :
0.8~1.2Ω
0Ω
YL to RD
0Ω
WH to BL
Result
Test Points
0Ω
0Ω
Result
Test Points
Pulsing signal
10 Vdc
(7) to (4)
Pulsing signal
10 Vdc
(5) to (4)
Voltage input
10-15 Vdc
(8) to (4)
8-12Ω
(8) to (7)
8-12Ω
(8) to (5)
Remark
Result
Test Points
10 Vdc
(7) to (4)
10 Vdc
(5) to (4)
10-15 Vdc
(8) to (4)
8-12Ω
(8) to (7)
8-12Ω
(8) to (5)
Remark
Result
Test Points
5~15Ω
Pin3 to Pin1
5~15Ω
Pin2 to Pin3
5~15Ω
Pin1 to Pin2
Result
Test Points
5~15Ω
Pin3 to Pin1
5~15Ω
Pin2 to Pin3
5~15Ω
Pin1 to Pin2
Result
Test Points
`
43
4-9-1. TROUBLESHOOTING WITH ERROR
Is displayed?
When you press both
Water
level button and Spin button
simultaneously,
is the water level frequency
below 26.0 kHz?
Check the AIR
CHAMBER
and the tube
(clogged).
Is filter inlet valve clogged
with foreign material?
Is resistance between
each terminal of INLET
VALVE ASSEMBLY
0.8-1.2 kΩ?
(Refer to 9-5 inlet valve
assembly)
assembly)
Replace the
INLET VALVE
ASSEMBLY.
Is the voltage of the inlet
valve connector
12V DC?
( Check the all terminal of
INLET VALVE ASSEMBLY
while the power is on.)
Replace the
INLET VALVE
ASSEMBLY
After checking connector,
is the water level frequency
below 24.6 kHz?
Check the
PRESSURE
SWITCH
Replace the MAIN PWB
ASSEMBLY
No
Yes
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Yes
Is Electrical connection
correct?
correct?
(Refer to 9-5wiring diagram)
Replace the
MAIN HARNESS
Yes
No
No
Clean or
replace the filter.
Is the connector connected to
inlet valve assembly
disconnected or
disassembled?
Reconnect or
repair
the connector
Is the connector connected to
MAIN PWB assembly dis-
connected or disassembled?
(NA1)
Reconnect or
repair
the connector
[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
INLET VALVE ERROR
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