Troubleshooting - Mitsubishi Electric City Multi PKFY Series Technical & Service Manual

8

TROUBLESHOOTING

8-1. HOW TO CHECK THE PARTS
PKFY-P06NBMU-E
PKFY-P06NBMU-ER1
Parts name
Room temperature
Disconnect the connector then measure the resistance with a tester.
thermistor (TH21)
(At the ambient temperature 50°F~86°F)
Liquid pipe temperature
thermistor (TH22)
4.3k ~9.6k
Gas pipe temperature
thermistor (TH23)
Measure the resistance between the terminals with a tester. (At the ambient temperature 77°F)
Vane motor (MV)
4 Orange
M
2 White
Red-White
1 Red
Yellow Blue
Connect pin No.
5 3
Fan motor (MF)
Measure the resistance between the terminals with a tester. (At the ambient temperature 68°F)
FAN
1
White
Red
White-Black
4
Black
6
Linear expansion Disconnect the connector then measure the resistance value with a tester.
valve (LEV) (Coil temperature 68°F)
CN60
White
1
Yellow
2
Orange (1)-(5)
3
LEV
White-Red
Blue
4
Red
5
Brown
6
OCH461B
PKFY-P08NBMU-E
PKFY-P08NBMU-ER1
Normal Abnormal
Open or short
Normal Normal
- - -
Red-Blue Red-Orange
400 ± 7%
Normal
313 ± 8%
Red-Black 108 ± 8%
Normal
(2)-(6) (3)-(5)
Yellow-Brown Orange-Red
200 ± 10%
Check points
Refer to the next page for the details.
Abnormal
-
Red-Yellow
Open or short
Abnormal
Open or short
Abnormal
(4)-(6)
Blue-Brown
Open or short
15 15