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8-6. HOW TO CHECK THE PARTS
OUTDOOR UNIT : MXZ-8B48NA
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10~30, 50°F~86°F)
Thermistor (TH3)
<Outdoor pipe>
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Outdoor>
Normal
160k~410k
4.3k~9.6k
TH4
TH3
TH6
TH7
Abnormal
Open or short
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20
, 68°F)
Solenoid valve coil
<Four-way valve>
(21S4)
Motor for compressor
(MC)
Normal
Abnormal
Open or short
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20
, 68°F)
Normal
Abnormal
Open or short
Solenoid valve coil
<Bypass valve>
(SV2)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20
, 68°F)
Normal
1327 ± 10
Abnormal
Open or short
Solenoid valve coil
<Bypass valve>
(SV1)
Fan motor(MF1,MF2)
0.188
Measure the resistance between the terminals with a tester.
(Winding temperature 20
, 68°F)
Normal
Abnormal
Open or short
W
V
U
Refer to next page.
1435 ± 150
1450 ± 150