LG WM3001HPA Service Manual ▷ View online
52
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
53
9-9. LAMP
Wiring
diagram
diagram
Circuit in the MAIN PWB / Wiring Diagram
16.5V
R
RD3
BL
GY
RD
1 2 3
1 2 3
1 2 3
12
3
12
3
RD BK
LAMP
TR
R
MICOM
MAIN PWB
R
Function
Test
points
points
Result
The Lamp (Drum Light) comes on when the POWER button is pressed. It goes off
when the door is closed and the washer starts operation. It remains off when the
door is locked. It can be turned on while the washer is in operation by pressing the
RINSE+SPIN button for 3 seconds.
The lamp will turn off automatically 4 minutes later. It comes on when the washing
cycle is finished and goes off 4 minutes later.
when the door is closed and the washer starts operation. It remains off when the
door is locked. It can be turned on while the washer is in operation by pressing the
RINSE+SPIN button for 3 seconds.
The lamp will turn off automatically 4 minutes later. It comes on when the washing
cycle is finished and goes off 4 minutes later.
Original
Test Points
(3) to (1)
Result
16.5 Vdc
Remarks
Voltage Input
LAMP
(1) (3)
54
9-10. VIBRATION SENSOR ASSEMBLY
Wiring
diagram
diagram
Circuit in the MAIN PWB / Wiring Diagram
MAIN PWB
MICOM
SDA
5V
BL2 BL
RD
VIBRA
TION SENSOR
BL
BK
YL
BK
YL
1
4 4
3
2
1
3
2
1
2
3
4
3
4
1
2
3
4
2
3
4
SCL
Function
Test
points
points
Result
The vibration sensor is designed to decrease the vibration of the washing machine.
It is attached to the tub cover of washing machine. It estimates the vibration of
washing machine’s tub during drying. And, it reduces the vibration and the noise of
washing machine.
It is attached to the tub cover of washing machine. It estimates the vibration of
washing machine’s tub during drying. And, it reduces the vibration and the noise of
washing machine.
Original
Test Points
(1) to (3)
Result
5.0 Vdc
Remarks
Voltage Input
Vibration Sensor
(1)
(3)
55
Be sure to unplug the machine before disassembling and repairing the parts.
CONTROL PANEL
1
Unscrew 2 screws on the back of the top plate.
2
Pull the top plate backward and upward as
shown.
3
Disconnect the Display PWB assembly
connector from trans cable.
4
Pull out the drawer and unscrew 2 screws.
5
Remove one screw.
6
Lift the side the control panel assembly and
pull it out.
7
Unscrew the 8 screws from the control panel
assembly.
8
Disassemble the Display PWB Assembly.
TOP PLATE ASSEMBLY
CONTROL PANEL ASSEMBLY
DRAWER
CONTROL PANEL ASSEMBLY
DISPLAY PWB ASSEMBLY
10. DISASSEMBLY INSTRUCTIONS
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