Mitsubishi Electric MXZ-3E54VA-E1 Service Manual page 92

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA
MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ
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
Linear expansion valve
WHT
LEV
RED
ORN
YLW BLU
High pressure switch
(HPS)
OBH723D
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: -10 °C ~ 40 °C)
MXZ-3E54VA MXZ-3E68/4E72VA
0.86 Ω ~ 1.06 Ω 0.63 Ω ~ 0.78 Ω
• Refer to 11-6. .
Measure the resistance using a tester. (Part temperature: -10 °C ~ 40 °C)
MXZ-3E54/3E68/4E72VA
1.26 kΩ ~ 1.62 kΩ
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-4E83/5E102VA
MXZ-2E53VAHZ
0.83 Ω ~ 1.03 Ω
Normal (Each phase)
MXZ-4E83/5E102VA
MXZ-2E53VAHZ
1.20 kΩ ~ 1.77 kΩ
Normal
37.4 Ω ~ 53.9 Ω
Pressure
3.43 ± 0.15 MPa
4.41 ± 0.1 MPa
92
MXZ-4E83VAHZ
0.77 Ω ~ 0.95 Ω
MXZ-4E83VAHZ
1.24 kΩ ~ 1.86 kΩ
Normal
Close
Open