LG WM2487HWM Service Manual ▷ View online
48
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
49
9-9. LAMP
Wiring
diagram
diagram
Circuit in the MAIN PWB / Wiring Diagram
16.5V
R
RD
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)
50
10. DISASSEMBLY INSTRUCTIONS
CONTROL PANEL ASSEMBLY
1
Unscrew 2 screws on the back of the top plate.
Be sure to unplug the machine before disassembling and repairing the parts.
2
Pull the top plate backward and upward as shown.
4
Pull out the drawer and unscrew 2 screws.
5
Remove one screw.
8
Disassemble the Display PWB Assembly.
6
Lift the side the control panel assembly and
pull it out
7
Unscrew the 8 screws from the control panel
assembly.
3
Disconnect the Display PWB assembly connector
from trans cable.
51
MAIN PWB ASSEMBLY
1
Disconnect the POWER connector and SENSOR
SWITCH ASSEMBLY.
2
Remove the Protective cover.
3
Disconnect the connectors.
4
Unscrew 1 screw on the back.
5
Remove the Main PWB.
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