LG WM2601HW Service Manual ▷ View online
48
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)
49
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)
50
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
51
Function
2. Water level sensor
1) Structure of water level sensor
2) Operation mechanism of Steam generator
After supplying some amount of water through inlet valve and water level
sensor, Heater operates and steam generates. Generated steam is sprayed by
nozzle. If the water in the steam generator is reduced by spraying steam, water
level sensor decide to supply water or not.
sensor, Heater operates and steam generates. Generated steam is sprayed by
nozzle. If the water in the steam generator is reduced by spraying steam, water
level sensor decide to supply water or not.
3) Operation method of Steam generator
The Steam Generator Assembly is supplied as an assembly only; parts like the
water level sensor, thermistor, or heater cannot be replaced individually.
Diagnosis is limited to determining malfunction and replacing as an assembly.
The steam generator does not have to be removed from the machine to be
drained. Be sure to let the water cool to avoid a burn. Have a hose available to
slip onto the connector or a large towel to catch the water so it doesn’t run
down into the machine cabinet. If you remove the steam generator before
draining it, be sure to avoid tipping it and spilling the water.
water level sensor, thermistor, or heater cannot be replaced individually.
Diagnosis is limited to determining malfunction and replacing as an assembly.
The steam generator does not have to be removed from the machine to be
drained. Be sure to let the water cool to avoid a burn. Have a hose available to
slip onto the connector or a large towel to catch the water so it doesn’t run
down into the machine cabinet. If you remove the steam generator before
draining it, be sure to avoid tipping it and spilling the water.
2) Function of Water level sensor
It is the part of sensing water level. It decides to supply water or not when the
steam generate. (to protect heater)
steam generate. (to protect heater)
Maximum water level
Minimum water level
common
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