LG WT6001HVA Service Manual ▷ View online
FOR LG TECHNICIAN
4-6. TROUBLESHOOTING SUMMARY
37
Pin1: R
x
Pin2:
T
x
Pin3: Smps2_5v Pin4: GN
D
Pin5: Standby Pin6: Smps2_13
v
Pin7: Boot
76.5 kΩ
50.6 kΩ
23.6 kΩ
16.6 kΩ
7.5 kΩ
5.6 kΩ
FOR LG TECHNICIAN
4-7. TROUBLESHOOTING WITH ERROR CODE
38
Trouble
IE
OE
dE
dL
FE
tE
PE
LE
No Power
1. Verify the valve is open and water is on.
2. Check the filter on inlet valve whether
clogged with foreign material or not.
3. Check the connector of valve and RD6 on PCBA.
4. Check the testmode (Testmode 3)
5. Check the valve resistance. (0.8-1.2 kΩ)
1. Check the test mode (Testmode 6)
2. Check the connector of PCBA or pump or
connection connector
3. Check the connection from PCB to pump by tester
4. Check the pump SPEC (resistance of the coil is
10-20 Ω) and input voltage on working (120V±5%)
1. Connect other doorlock switch and check the lid
sensing by magnet
1. Check the doorlock switch trying locking
2. Check the balance of the lid.
1. Check the Water level
(1) Power on and run
(2) Press the SPIN SPEED & DELAY WASH
2. Check the valve
1. Check the connector of PCBA (YL2) or thermistor
or connection connector
2. Check the cutted connection from PCB to
thermister by tester
1. Check the Presure Sensor (21~23 Ω ±10%) and
connection
2. Check the Connector (BL6)
1. Check the connector of PCBA (YL3, BL6) or
motor connector or connection connector
2. Check the magnet for Rotor
3. Check the Rotor Resistance (YL3) 5 to 15 Ω
(U-V, V-W, W-V :U=1, V=2, W=3)
1. Check the fuse for noise filter and PCBA by tester
2. Check the IPM
-. Check the Short between top switch
Heatsink and YL3 pin by Tester
Check
counterplan
1. Turn the tap on.
2. Clean or replace the filter
3. Reconnect or repair the connector
4. Replace the PCBA
5. Replace the inlet valve assembly.
1. Replace the PCBA
2. Reconnect or repair the connector
3. Replace harness
4. Replace pump
1. Replace the doorlock switch or PCBA
1. If trying, replace the doorlock switch.
Or not trying replace the PCBA
2. Replace the door or set the balance
1. If segment is displayed under 10,
replace the PCBA
2. Replace the valve
1. Reconnect or repair the connector
2. Replace harness
1. Reconnect or repair the connector
1. Reconnect or repair the connector
2. Replace the rotor.
3. Replace the stator.
1. If the beep sounds, the fuse is OK.
If no beep, change the noise filter,
including the fuse.
2. If beep sound, replace the PCBA.
FOR LG TECHNICIAN
39
DRAIN ERROR
Yes
Is OE displayed?
Reconnect or
repair the
connector
No
Is the connector connected to
pump motor assembly
disconnected or
disassembled?
When you press both SPIN
SPEED button and DELAY
WASH button simultaneously,
is the water level frequency
below 26.0 kHz?
Drain pump
Connection connector
Yes
No
Is the coil of the drain pump
too high or low? (resistance of
the coil is 10-20 Ω)
Yes
Check the air
chamber, the tube
(clogged), and
press switch
Yes
Is the voltage between
connectors out of range?
(WH6 Pin 1)
- After remove Terminal
Position Assurance
of connector, check as follows.
- Pump running:120V±5%
- Stopped Motor/Pump: 0~1V
Method
1. Press the Prefs button.
2. Press the display LCD for 3 seconds.
3. Press Start/Pause button
ㆍ
1 times ➔ Display version
ㆍ
2 times ➔ Inlet valve check mode
ㆍ
3 times ➔ Cold Valve, Bleach Valve
ㆍ
4 times ➔ Rinse Valve, Hot Valve
ㆍ
5 times ➔ Jet Spray Valve
ㆍ
6 times ➔ Heater Check
ㆍ
7 times ➔ Alpha Check
ㆍ
8 times ➔ Pump Check
ㆍ
9 times ➔ Pump Check
[Note] Environmental check list
1) The drainage hose must not stay in a lower position
2) The drainage hose must not be bent or
clogged in any way due to the surrounding
physical configuration
3) The drainage hose must not be frozen at all times.
4) The drainage pump must not have any improper
substance or material inside that may cause
a machine breakdown.
Yes
No
Replace the drain
pump assembly.
Replace the
main pcb
assembly.
FOR LG TECHNICIAN
40
LOCKED MOTOR ERROR
Yes
Is LE displayed?
Reconnect
the connector
(connector /
wire / motor )
Check the connectors below.
Is the connector disconnected
or disassembled?
(motor hall sensor connector,
motor drive connector)
- Main PCB Assembly
(YL3,BL6)
Motor Drive
Hall Sensor
- Harness Connection
Yes
No
No
Is rotor magnet cracked?
Is hall sensor defective?
Yes
Yes
Check the IPM in the
controller. Is IPM short?
Yes
No
Yes
Is the resistance values
in the range of 5 to15 Ω?
(U-V, V-W, W-V
:U=1, V=2, W=3)
- After pull out the YL3
connector, check the terminal
of the connector in wire.
No
Replace the rotor
Replace the stator
Replace the hall
sensor
Replace the
MAIN PCB
ASSEMBLY
Motor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Hall Sensor
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Motor Drive
Magnet
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