Troubleshooting - Mitsubishi Electric PLFY-P32VBM-E Service Manual

9

TROUBLESHOOTING

9-1. HOW TO CHECK THE PARTS
PLFY-P32/40/50/63/80/100/125VBM-E.UK PLFY-P32/40/50/63/80VBM-E
Parts name
Room temperature Disconnect the connector then measure the resistance with a tester.
thermistor (TH21) (At the ambient temperature of 10:~30:)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Vane motor (MV) Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20:~30:)
White
Orange
Red
Yellow
Blue
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
(Option) i-see sensor controller board.
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
4 3 2 1
Blue BlackPink Brown
NOTE : Be careful of handing such a static electricity.
Measure the resistance between the terminals with a tester.
Vane motor for
(At the ambient temperature of 20:~30:)
i-see sensor (Option)
White
Orange
Red
Yellow
Blue
Linear expansion
Disconnect the connector then measure the resistance valve with a tester.
Blue
valve(LEV)
Brown
M
Yellow
White
Red
Orange
Normal
4.3k"~9.6k" Open or short
Connector
(5-3, 0-8, 5-3, )-8)
Red - Yellow
(5-1, 0-6, 5-1, )-6)
Red - Blue
Red - Orange (5-4, 0-9, 5-4, )-9)
(5-2, 0-7, 5-2, )-7)
Red - White
Normal
290" Open or short
Normal
UP Short
DOWN Open
Black plastic tape
(At the ambient temperature of 10:~40:)
i-see sensor connector
2(–)—4(+)
1(+)—2(–)
Connector Normal
Red - Yellow
Red - Blue
Red - Orange
Red - White
Normal
White-Red Yellow-Brown Orange-Red
150k" i10%
Check points
Abnormal
(Refer to Thermistor characteristic graph.)
Abnormal
Abnormal
Other than short
Other than open
Normal
DC 1.857V~ 3.132V
DC 0.939V~ 1.506V
Abnormal
Open or short
250"
Blue-Brown
19
.UK
1
Normal Abnormal
300" Open or short
Switch
Magnet
Moving
Part
Do not disassemble corner panel
with i-see sensor.
Abnormal
Other than the normal
Other than the normal
Abnormal
Refer to 9-1-3.
Open or short