Mitsubishi Electric PUMY-P100VHM Technical & Service Manual page 56

8-7. HOW TO CHECK THE PARTS
PUMY-P100VHM PUMY-P125VHM PUMY-P140VHM
Parts name
Thermistor (TH3) Disconnect the connector then measure the resistance using a tester.
<Outdoor pipe>
(Surrounding temperature 10:~30:)
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<Low pressure saturated
temperature>
Thermistor (TH7)
<Outdoor>
Thermistor (TH8)
<Heat sink>
Fan motor(MF1,MF2) Refer to next page.
Solenoid valve coil Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:)
<Four-way valve>
(21S4)
Motor for compressor Measure the resistance between the terminals using a tester.
(Winding temperature 20:)
(MC) U
V
W
Measure the resistance between the terminals using a tester.
Solenoid valve coil
(Surrounding temperature 20:)
<Bypass valve>
(SV1)
Normal
TH4 160k"~410k"
TH3
TH6 4.3k"~9.6k"
TH7
TH8 w1
39k"~105k"
Normal
1435±150"
Normal
0.188"
Normal
1197±10"
Check points
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
56
w1 TH8 is internal thermistor
of power module.