Mitsubishi Electric MXZ-2C30VA Service Manual page 83

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-2C30VA MXZ-2C40VA MXZ-2C52VA MXZ-3C54VA MXZ-3C68VA MXZ-4C71VA
MXZ-4C80VA MXZ-5C100VA MXZ-6C120VA
Part name
Defrost thermistor (RT61)
Fin temperature thermistor (RT64)
MXZ-2C/3C/4C/5C
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger tempera-
ture thermistor (RT68)
Discharge temperature thermistor
(RT62)
Compressor
W
RED
V
U
WHT BLK
Outdoor fan motor
WHT
RED BLK
2 3
1
W
V
U
MXZ-2C MXZ-3C/4C/5C
Outdoor fan motor
MXZ-6C
R.V. coil
Solenoid coil
MXZ-6C
Linear expansion valve
WHT
LEV
RED
ORN
YLW BLU
High pressure switch (HPS)
MXZ-3C68/4C/5C/6C
Measure the resistance with a tester.
Refer to 11-7. "TEST POINT DIAGRAM AND VOLTAGE" 1. "Outdoor electronic control
P.C. board", 2. "Outdoor control P.C. board" or 4. "Outdoor Power 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 electronic control
P.C. board" or 2. "Outdoor control P.C. board" for the chart of thermistor.
Measure the resistance between terminals using a tester.
(Winding temperature : -10°C ~ 40°C)
MXZ-2C30VA
MXZ-2C40VA
1.49 ~ 1.84
Measure the resistance between lead wires using a tester.
(Part temperature : -10°C ~ 40°C)
RED
U (W)
MXZ-2C
WHT
V (V)
12 ~ 16
BLK
(U)
W
Refer to 11-6.
Measure the resistance using a tester. (Part temperature : -10°C ~ 40°C)
MXZ-3C54VA
MXZ-3C68VA
MXZ-4C71VA
1.26 k ~ 1.62 k
Measure the resistance using a tester. (Part temperature : -10°C ~ 40°C)
Normal (Each phase)
MXZ-6C120VA
1.17 k ~ 1.43 k
Measure the resistance using a tester. (Part temperature : -10°C ~ 40°C)
Color of lead wire
WHT - RED
RED - ORN
YLW - RED
RED - BLU
HPS
Check method and criterion
Normal (Each phase)
MXZ-2C52VA MXZ-3C68VA
MXZ-3C54VA MXZ-4C71VA
0.86 ~ 1.06 0.63 ~ 0.78
Normal (Each phase)
MXZ-3C/4C/5C
13.4
.
Normal (Each phase)
MXZ-2C30VA
MXZ-2C40VA
MXZ-2C52VA
1.2 k ~ 1.56 k
Normal
37.4 ~ 53.9
Pressure
3.7 0.3 MPa
4.8 0.2 MPa
83
MXZ-4C80VA
MXZ-5C100VA
1.29 ~ 1.49 0.47
~ 16.4
MXZ-4C80VA
MXZ-6C120VA
MXZ-5C100VA
1.26 k ~ 1.62 k
Normal
Close
Open
MXZ-6C120VA
~ 0.57