LG JUPITERCUT Service Manual ▷ View online
DIAGNOSTIC TEST
10
Test 2 DOOR SWITCH / LAMP CHECK
Trouble Symptom : Malfunction of lamp operation and door switch
No operation of pump motor
Displays “ ” in case of the door closed.
The door must be closed and start.
Displays “ ” in case of the door closed.
The door must be closed and start.
Check door switch
movement.
- See the left picture.
movement.
- See the left picture.
Check and replace lamp.
- See the 13 page
• Door switch is working
normally.
• Replace door hook and
close the door.
• Check door switch
- See 15 page
Measurement condition : Check if they are working while being connected to power supply.
When door is closed, does
lamp turn off?
lamp turn off?
When "Start" button is
pressed, the dryer is working?
pressed, the dryer is working?
When door is opened, does
lamp turn on?
(Tumbling stops)
lamp turn on?
(Tumbling stops)
When door is opened or
closed, door switch hook is
broken?
closed, door switch hook is
broken?
Check or replace Controller Assembly.
Replace Harness and connector.
Replace Harness and connector.
• With door closed, when
"Start" button is pressed,
lamp turns off and
controller is working, but
the dryer is not working.
lamp turns off and
controller is working, but
the dryer is not working.
• Check the electrical conduction by
Yellow tab relay -blue wire and
White 3pin connector – white wire
(By open and close door)
White 3pin connector – white wire
(By open and close door)
25
• Check white 3 pin female
connector from motor.
- Resistance check
• Check white 3 pin male
connector from controller.
(when power cord is plugged)
- two wire in white 3pin male
(when power cord is plugged)
- two wire in white 3pin male
connector : 220~240V
DIAGNOSTIC TEST
10
Test 3 Motor check
Trouble Symptom : Motor malfunction, Occurrence of the “Clean filter” repeatedly
• Before check process, Check
the motor rotating by the LQC
test mode "See the 18 page”.
test mode "See the 18 page”.
• When power is on and
pressed the start button, does
motor operate?
motor operate?
• Is there any abnormal noise
during operation?
• Check controller
-See page 17
(PCB Assembly Lay-out)
(PCB Assembly Lay-out)
• Check the harness connection.
- Motor part : White 3 pin
housing.
- Controller part : Red 3 pin
housing ( Orange and Blue
wire ).
wire ).
- Capacitor part : White 2 pin
housing.
• Check the belt ( position /
broken ).
• Check the Controller
- TR1 , TR2 Broken ?
• Check the slide ( 3 ea ).
• Check Capacitor volume. Power
on & press the start button.
- See the left picture.
- See the left picture.
• Check belt is burst.
• Check structural restriction.
• Check structural restriction.
( Motor supporter / Air guide
Blower )
Blower )
• Check or replace Motor
- Check Motor TP
• Check Harness connection
• Check the Motor resistance.
• Check the Motor resistance.
(see page 15 )
Measurement condition :
• Power cord is unpluged.
• Door is closed.
• Check the user condition.
• Door is closed.
• Check the user condition.
- Put overload into drum?
- Normally Input Voltage and Hertz?
- Normally Input Voltage and Hertz?
• Pre-Check door switch
(If door switch has contact problem, motor should not operate.)
26
DIAGNOSTIC TEST
10
Test 4 Heater check
Trouble Symptom : Heater is not working. Drying failure. The designated
temperature is not reached.
Measurement condition : Power cord is unplugged.
1. Check if Lint filter is
damaged or clogged.
2. Check if condensing unit
is clogged or not.
Trouble Symptom : Motor malfunction, ventilation error
Heater On/Off occurs
frequently
frequently
1
• Check and replace
controller.
• See page 17, PCB
assembly lay-out.
• Check harness &
connection
• Check the resistance of thermostat
to heater.
Is it less than 1Ω?
Is it less than 1Ω?
• Replace Heater
• Check harness &
connection
Manually reset thermostat
(Press button ).
And check resistance thermostat.
(Press button ).
And check resistance thermostat.
• Check the heater resistance.
1) Yellow tab relay violet wire ~
1) Yellow tab relay violet wire ~
White tab relay yellow wire :
50Ω ?
50Ω ?
2) White connector 2wire : 50Ω ?
( See photo on the left )
27
DIAGNOSTIC TEST
10
Test 5 Pump check
Trouble Symptom : LED display show " OE " signals.
• Disassemble Pump
- Check foreign objects
- Check impeller
- Check impeller
restriction
- Check connection
hose clogged
(Measure with power on)
On LQC test mode, when
Pump is on,
Can you hear any operating
noise?
On LQC test mode, when
Pump is on,
Can you hear any operating
noise?
Measurement condition : Power cord is unplugged.
Check the hose blocked with foreign body or kinked.
(Measure after power is off.)
With Yellow 3pin disconnected
from controller,
With Yellow 3pin disconnected
from controller,
YL3 white wire - YL3 orange
wire resistance ranges 4.5Ω ?
YL3 white wire - YL3 yellow
wire resistance ranges 4.5Ω ?
• Check or replace pump
• Check harness &
• Check harness &
connection
• Check Pump sensor
With White 6pin disconnected from
controller,
check White6
blue ~ White6
blue
resistance.
-.If there is water: 5MΩ level ( 25 )
-.If there is no water: 0MΩ level ( 25 )
28
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