Mitsubishi Electric MXZ-2D33VA-E1 Service Manual page 77

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-2D33VA MXZ-2D40VA MXZ-2D53VA MXZ-2D53VAH
MXZ-3D54VA MXZ-3D68VA MXZ-4D72VA MXZ-4D83VA MXZ-5D102VA
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
WHT
RED BLK
2 3
1
W
V
U
MXZ-2D33VA/40VA/53VA
MXZ-2D53VAH
MXZ-4D83VA/5D102VA
Outdoor fan motor
MXZ-3D54VA/3D68VA/4D72VA
R.V. coil
Linear expansion valve
WHT
LEV
RED
ORN
YLW BLU
High pressure switch (HPS)
MXZ-3D68VA/4D72VA
MXZ-4D83VA/5D102VA
Defrost heater
MXZ-2D53VAH
OBH626B
Measure the resistance with a tester.
Refer to 11-7. "TEST POINT DIAGRAM AND VOLTAGE" 1. "Inverter P.C. board", 2.
"Outdoor control P.C. board " or 3. "Outdoor power P.C. board" for the chart of thermis-
tor.
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. "Inverter P.C. board", 2.
"Outdoor control P.C. board ", for the chart of thermistor.
Measure the resistance between terminals with a tester.
(Winding temperature : -10 °C ~ 40 °C)
Normal (Each phase)
MXZ-2D53VA
MXZ-2D33VA
MXZ-2D53VAH
MXZ-2D40VA
MXZ-3D54VA
1.49 ~ 1.84 0.86
Measure the resistance between lead wires with a tester.
(Part temperature : -10 °C ~ 40 °C)
Normal (Each phase)
MXZ-2D
12 ~ 16
Refer to 11-6. .
Measure the resistance with a tester. (Part temperature : -10 °C ~ 40 °C)
Normal
MXZ-2D33VA
MXZ-2D40VA
MXZ-3D54VA
MXZ-2D53VA
MXZ-3D68VA
MXZ-2D53VAH
MXZ-4D72VA
MXZ-4D83VA
MXZ-5D102VA
1.2 k ~ 1.56 k 1.26 k ~ 1.62 k
Measure the resistance with a tester. (Part temperature : -10 °C ~ 40 °C)
Color of lead wire
WHT - RED
RED - ORN
YLW - RED
RED - BLU
Pressure
HPS
Measure the resistance with a tester. (Part temperature : -10 °C ~ 40 °C)
Normal
349 ~ 428
77
Check method and criterion
MXZ-3D68VA
MXZ-4D72VA
~ 1.06 0.63 ~ 0.78
MXZ-4D83VA
MXZ-5D102VA
13.4 ~ 16.4
Normal
37.4 ~ 53.9
3.7 0.3 MPa
4.8 0.2 MPa
MXZ-4D83VA
MXZ-5D102VA
1.29 ~ 1.49
Normal
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