How To Check The Parts - Mitsubishi Electric MXZ-8B48NA Technical & Service Manual

9-6. HOW TO CHECK THE PARTS

OUTDOOR UNIT : MXZ-8B48NA
Parts name
Disconnect the connector then measure the resistance with a tester.
Thermistor (TH3)
(At the ambient temperature 10 ~30 , 50°F~86°F)
<Outdoor pipe>
Thermistor (TH4)
<Discharge/Compressor>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Outdoor>
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 , 68°F)
<Four-way valve>
(21S4)
Motor for compressor Measure the resistance between the terminals with a tester.
(Winding temperature 20 , 68°F)
(MC)
U
V
W
Measure the resistance between the terminals with a tester.
Solenoid valve coil
(At the ambient temperature 20 , 68°F)
<Bypass valve>
(SV1)
Measure the resistance between the terminals with a tester.
Solenoid valve coil
(At the ambient temperature 20 , 68°F)
<Bypass valve>
(SV2)
MXZ-8B48NAR1
Normal
TH4 160k ~410k
TH3
4.3k ~9.6k
TH6
TH7
Normal
1435 ± 150
Normal
0.188
Normal
1327 ± 10
Normal
1450 ± 150
Check points
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
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