Troubleshooting - Mitsubishi Electric PLFY-P32VBM-ER2.UK Technical & Service Manual

9

TROUBLESHOOTING

9-1. HOW TO CHECK THE PARTS
PLFY-P32/40/50/63/80/100/125VBM-E.UK
PLFY-P32/40/50/63/80/100/125VBM-ER2.UK
Parts name
Room temperature Disconnect the connector then measure the resistance with a tester.
thermistor (TH21) (At the ambient temperature of 10
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
4.3k ~9.6k
(TH23)
Vane motor (MV) Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20
White
MV
Red - Yellow
Orange Red - Blue
Red - Orange ( - ,
Red
Yellow
Blue Red - White
Drain pump (DP) Measure the resistance between the terminals with a tester.
(Winding temperature 20 )
YLW
1
3
YLW
Drain float switch (FS)
Measure the resistance between the terminals with a tester.
Moving part
State of moving part
1
2
3
4
i-see sensor
Turn on the indoor unit with the black plastic tape on the outside of i-see sensor controller board.
(Option)
With electricity being turned on, measure the power voltage between connectors with tester.
i-see sensor rotates and pull out the connector of motor for i-see sensor.
4 3 2 1
i-see sensor (At the ambient temperature of 10
i-see sensor connector
4 3 2 1
Blue Black Pink Brown
NOTE : Be careful not to discharge static electricity into electronics.
Measure the resistance between the terminals with a tester.
Vane motor for
(At the ambient temperature of 20
i-see sensor (Option)
White
Red - Yellow
MV
Red - Blue
Orange
Red - Orange
Red
Red - White
Yellow
Blue
Linear expansion
Disconnect the connector then measure the resistance valve with a tester.
valve(LEV) Blue
Brown
M
White-Red
Yellow
White
Red Orange
OCH413D
Normal Abnormal
Open or short
Connector
( - , - , - ,
( - , - , - ,
- , - ,
( - , - , - ,
Normal Abnormal
290 Open or short
Normal
UP Short
DOWN Open
Black plastic tape
(–)— (+) DC 1.857V~ 3.132V
(+)— (–) DC 0.939V~ 1.506V
Connector Normal
250
Normal
Yellow-Brown Orange-Red
200 10%
PLFY-P32/40/50/63/80VBM-E
PLFY-P32/40/50/63/80/100/125VBM-ER3.UK
Check points
- 30 )
(Refer to Thermistor characteristic graph.)
- 30 )
Normal
- )
- )
300
- )
- )
Abnormal
Other than short
Other than open
Do not disassemble corner panel
with i-see sensor.
- 40 )
Normal
Other than the normal
Other than the normal
- 30 )
Abnormal
Open or short
Abnormal
Blue-Brown
Open or short
25
.UK
1
Abnormal
Open or short
Switch
Magnet
Moving
Part
Abnormal
Refer to 9-1-3.