LG WM3001HPA Service Manual ▷ View online
48
9-6. HEATER ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB
MICOM
12V
Heater
Vac
X100
43
43
Tab Relay
Heater driving circuit
Wiring diagram
MAIN PWB
(X71)
3 4
3 4
3 4
3 4
3 4
3 4
(X135)
(X134)
BK
BL
YL
RD
GY
BL
BK
BK
Vac
WASH
HEATER
HEATER
STEAM
GENERATOR
HEATER
GENERATOR
HEATER
YL
FUSE
FUSE
Function
Test points
Result
1. The Wash Heater is designed to raise the wash water to the desired temperature
selection during certain wash cycles.
2. The Steam generator heater is designed to make the water to the steam during
steam cycles.
Wash Heater
Steam Generator Heater
* Each circuits of loads in wiring diagram are all same.
Wash Heater
Steam Generator Heater
Test Points
Result
(1) to (2)
12-18
Ω
Test Points
Result
(1) to (2)
12-18
Ω
(1)
(2)
(2)
(1)
49
9-7. THERMISTOR ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB / Wiring Diagram
MAIN PWB
MICOM
NA3
BL
BN
WH
1
2
1
2
1
2
1
2
WH
WASH
THERMISTOR
STEAM
GENERATOR
THERMISTOR
1
2
3
4
5
6
1
5V
5V
R
R
R
R
C
C
C
C
2
3
4
5
6
Function
Test
points
points
The thermistor (temperature sensor) is used to monitor water temperature in the tub
or Steam Generator.
or Steam Generator.
Wash Thermistor
(2)
(1)
Steam generator Thermistor
(1) (2)
(1) (2)
50
Result
Wash Thermistor
Test Points
(1) to (2)
Result
(tolerance ±5%)
39.5 k
Ω
26.1 k
Ω
12.1 k
Ω
8.5 k
Ω
3.8 k
Ω
2.8 k
Ω
Remarks
At 86°F (30°C)
At 104°F (40°C)
At 140°F (60°C)
At 158°F (70°C)
At 203°F (95°C)
At 221°F (105°C)
Steam generator Thermistor
Test Points
(1) to (2)
Result
(tolerance ±5%)
39.5 k
Ω
26.1 k
Ω
12.1 k
Ω
8.5 k
Ω
3.8 k
Ω
2.8 k
Ω
2.1 k
Ω
1.4 k
Ω
1.0 k
Ω
0.7 k
Ω
0.4 k
Ω
Remarks
At 86°F (30°C)
At 104°F (40°C)
At 140°F (60°C)
At 158°F (70°C)
At 203°F (95°C)
At 221°F (105°C)
At 241°F (116°C)
At 266°F (130°C)
At 293°F (145°C)
At 320°F (160°C)
At 356°F (180°C)
51
9-8. STEAM GENERATOR ASSEMBLY
Wiring
diagram
diagram
Steam generator Water level sensor
circuit in the MAIN PWB / wiring diagram
circuit in the MAIN PWB / wiring diagram
Heater & Thermistor : Refer to the 9-6 / 9-7
MAIN PWB
MICOM
PHOTO
COUPLER
COUPLER
IC 2
5V
IC 1
YL2
PK
VT
NA
NA
GND L S
AG
SENSOR
DC5V
Input A
(long)
(long)
Input B
(short)
(short)
12
3
4
12
3
4
1
2
3
1
2
3
Original
Test
points
points
1. Steam generator
1) Construction of steam generator
Inlet valve that controls supplying water, Water level sensor that sense amount
of water supply, Thermistor ASSEMBLY the sense inner temperature of Steam
generator, Heater ASSEMBLY that heats water supply, Steam generator CASE
that is container of water supply, nozzle and hose of water supply.
of water supply, Thermistor ASSEMBLY the sense inner temperature of Steam
generator, Heater ASSEMBLY that heats water supply, Steam generator CASE
that is container of water supply, nozzle and hose of water supply.
WATER LEVEL SENSOR
THERMISTOR
ASSEMBLY
ASSEMBLY
HEATER
ASSEMBLY
ASSEMBLY
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