Trouble Shooting - Mitsubishi Electric PMFY Series Technical & Service Manual

8

TROUBLE SHOOTING

8-1. HOW TO CHECK THE PARTS
PMFY-P20VBM-E
PMFY-P20VBM-E
1
PMFY-P20VBM-E#2
PMFY-P20VBM-ER3
PMFY-P20VBM-ER4
Parts name
Room temperature Disconnect the connector then measure the resistance with a tester.
thermistor (TH21) (At the ambient temperature 10
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20
Yellow
MV
Red
Brown
Green Orange
Linear expansion
Disconnect the connector then measure the resistance valve with a tester.
valve(LEV)
Refer to the next page for a detail.
Blue
Brown
M
Yellow
Orange
Red
White
Drain pump (DP)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20 )
Blue
1
3
Blue
Drain sensor (DS)
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0
1
2
3
OC307E
PMFY-P25VBM-E
PMFY-P25VBM-E
PMFY-P25VBM-E#2
PMFY-P25VBM-ER3
PMFY-P25VBM-ER4
Normal
4.3k ~9.6k Open or short
Connector Normal
Brown — Yellow
Brown — Red
380
Brown — Orange
Brown — Green
Normal
(1)-(5) (2)-(6)
White-Red Yellow-Brown
200
Normal
400 ~480 Open or short
Normal
0.6k ~6.0k Open or short
PMFY-P32VBM-E
PMFY-P32VBM-E
1
PMFY-P32VBM-E#2
PMFY-P32VBM-ER3
PMFY-P32VBM-ER4
Check points
- 30 )
Abnormal
Refer to the next page for the details.
- 30 )
Abnormal
7% Open or short
(3)-(5) (4)-(6)
Orange-Red Blue-Brown
10%
Abnormal
- 60 )
Abnormal
Refer to the next page for the details.
22
PMFY-P40VBM-E
PMFY-P40VBM-E
1
PMFY-P40VBM-E#2
PMFY-P40VBM-ER3
PMFY-P40VBM-ER4
Abnormal
Refer to the next
Open or short
page for the details.
1