Troubleshooting - Mitsubishi Electric PLFY-WP32VBM-E Technical & Service Manual

8

TROUBLESHOOTING

8-1. HOW TO CHECK THE PARTS
PLFY-WP32VBM-E.UK PLFY-WP40VBM-E.UK PLFY-WP50VBM-E.UK
Parts name
Room temp. detection
Disconnect the connector then measure the resistance with a tester.
thermistor (TH21)
(At the ambient temperature of 10 to 30:)
Pipe temp. detection
thermistor/ from HBC unit
(TH22)
Pipe temp. detection 4.3 to 9.6 k"
thermistor/ to HBC unit
(TH23)
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20 to 30:)
White
MV
Red - Yellow
Orange Red - Blue
Red - Orange (5–4, 0–9, 5–4, )–9)
Red
Yellow Red - White
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 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 to 40:)
i-see sensor connector
4 3 2 1
Blue BlackPink 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 to 30:)
i-see sensor (Option)
White
Connector
Red - Yellow
MV
Red - Blue
Orange
Red - Orange
Red
Red - White
Yellow
Blue
OCH586
Normal Abnormal
Open or short
Connector
(5–3, 0–8, 5–3, )–8)
(5–1, 0–6, 5–1, )–6)
(5–2, 0–7, 5–2, )–7)
Normal Abnormal
290 " Open or short
Normal
UP Short
DOWN Open
Black plastic tape
1.857 to 3.132 V DC
2(−)–4(+)
0.939 to 1.506 V DC
1(+)–2(−)
Normal
250 "
Check points
(Refer to "8-1-1. Thermistor" .)
Normal
300 "
Abnormal
Other than short
Other than open
Do not disassemble corner panel
with i-see sensor.
Normal Abnormal
Other than the normal
Other than the normal
Abnormal
Open or short
17
Abnormal
Open or short
Switch
Magnet
Moving
Part