How To Check The Parts - Mitsubishi Electric MXZ-8A140VA Technical & Service Manual

9-6. HOW TO CHECK THE PARTS

OUTDOOR UNIT : MXZ-8A140VA MXZ-8A140VA
Parts name
Disconnect the connector then measure the resistance with a tester.
Thermistor (TH3)
(At the ambient temperature 10:~30:)
<Outdoor pipe>
Thermistor (TH4)
<Discharge>
Thermistor (TH7)
<Outdoor>
Thermistor (TH8)
<Heatsink>
Fan motor(MF1,MF2)
Refer to next page.
Solenoid valve coil Measure the resistance between the terminals with a tester.
(At the ambient temperature 20:)
<Four-way valve>
(21S4)
Measure the resistance between the terminals with a tester.
Motor for compressor
(Winding temperature 20:)
(MC)
U
V
W
Measure the resistance between the terminals with a tester.
Solenoid valve coil
(At the ambient temperature 20:)
<Bypass valve>
(SV1)
Measure the resistance between the terminals with a tester.
Solenoid valve coil
(At the ambient temperature 20:)
<Bypass valve>
(SV2)
Normal
TH4 160k"~410k"
TH3
4.3k"~9.6k"
TH7
TH8
39k"~105k"
Normal
MXZ-8A140VA MXZ-8A140VA
(1)
1435±150"
1370±100"
Normal
0.188"
Normal
1327±10"
Normal
MXZ-8A140VA MXZ-8A140VA
(1)
1197±10"
1450±150"
MXZ-8A140VA
1
Check points
Abnormal
Open or short
Abnormal
2, 3
Open or short
Abnormal
Open or short
Abnormal
Open or short
Abnormal
2, 3
Open or short
53
MXZ-8A140VA
2 3