Troubleshooting - Mitsubishi Electric PAC-MK50BC Technical And Service Manual

7

TROUBLESHOOTING

7-1. HOW TO CHECK THE PARTS
BRANCH BOX : PAC-MK50BC
Parts name
Disconnect the connector then measure the resistance with a tester.
Thermistor (TH-A–E)
(At the ambient temperature 10 to 30:)
<Gas pipe>
Disconnect the connector then measure the resistance with a tester.
Linear expansion valve
(Winding temperature 20:)
( LEV-A–E )
Red - White Red - Orange Brown - Yellow Brown - Blue
Red
M
1
Blue
2
Orange
3
Yellow
4
White
5
OCH574
PAC-MK30BC
Normal
4.3 to 9.6k"
Normal
46 ± 4"
15
Check points
Abnormal
Open or short
Abnormal
Open or short