Mitsubishi Electric MXZ-3C30NA Service Manual page 74

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-3C24NA
MXZ-2C20NAHZ
MXZ-3C24NA2
MXZ-2C20NAHZ2 MXZ-3C24NAHZ2 MXZ-3C30NAHZ2
Part name
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor (RT68)
Discharge temperature
thermistor (RT62)
Compressor
W
RED
V
U
WHT BLK
Outdoor fan motor
R.V. coil
2-way valve solenoid coil
MXZ-5C42NA
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
MXZ-5C42NA2
MXZ-2C20NAHZ2
MXZ-3C24NAHZ2
MXZ-3C30NAHZ2
Linear expansion valve
WHT
LEV
RED
ORN
YLW BLU
High pressure switch
(HPS)
Defrost heater
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
MXZ-2C20NAHZ2
MXZ-3C24NAHZ2
MXZ-3C30NAHZ2
OBH702E
MXZ-3C30NA
MXZ-3C24NAHZ
MXZ-3C30NA2
Measure the resistance with a tester.
Refer to 11-7. "Test point diagram and voltage", 1. "Outdoor control P.C.board",
2. "Outdoor power P.C. board", for the chart of thermistor.
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 11-7. "Test point diagram and voltage",1. "Outdoor control P.C. board" for the chart of thermistor.
Measure the resistance between terminals using a tester.
(Winding temperature: 14°F - 104°F)
MXZ-3C24NA
MXZ-3C24NA2 MXZ-3C30NA2 MXZ-4C36NA2
Measure the resistance between terminals using a tester.
(Winding temperature: 14°F - 104°F)
MXZ-5C42NA MXZ-2C20NAHZ
MXZ-5C42NA2 MXZ-2C20NAHZ2 MXZ-3C24NAHZ2 MXZ-3C30NAHZ2
Measure the resistance using a tester. (Part temperature: 14°F - 104°F)
MXZ-3C24NA
MXZ-3C24NA2 MXZ-3C30NA2 MXZ-4C36NA2
Measure the resistance using a tester. (Part temperature: 14°F - 104°F)
MXZ-5C42NA MXZ-2C20NAHZ
MXZ-5C42NA2 MXZ-2C20NAHZ2 MXZ-3C24NAHZ2 MXZ-3C30NAHZ2
Measure the resistance using a tester. (Part temperature: 14°F - 104°F)
Normal
MXZ-5C42NA
MXZ-2C20NAHZ
MXZ-3C24NAHZ
MXZ-3C30NAHZ
Measure the resistance using a tester. (Part temperature: 14°F - 104°F)
Color of lead wire
WHT - RED
RED - ORN
YLW - RED
RED - BLU
HPS
Measure the resistance using a tester. (Part temperature: 14°F - 104°F)
Normal
0.35 - 0.50
MXZ-4C36NA
MXZ-3C30NAHZ
MXZ-4C36NA2
Check method and criterion
Normal (Each phase)
MXZ-3C30NA
Normal (Each phase)
MXZ-3C24NAHZ
Normal (Each phase)
MXZ-3C30NA
Normal (Each phase)
MXZ-3C24NAHZ
MXZ-5C42NA2
MXZ-2C20NAHZ2
MXZ-3C24NAHZ2
MXZ-3C30NAHZ2
Normal
37.4 - 53.9
Pressure
537 ± 22 PSIG
+ 7
696 PSIG
-
15
74
MXZ-5C42NA
MXZ-5C42NA2
MXZ-4C36NA
MXZ-3C30NAHZ
MXZ-4C36NA
MXZ-3C30NAHZ
Normal
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