Mitsubishi Electric MXZ-2D33VA Service Manual page 137

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-2D33VA MXZ-2D40VA
MXZ-2D53VA2 MXZ-2D53VAH MXZ-2D53VAH2 MXZ-3D54VA
MXZ-3D68VA MXZ-4D72VA
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/42VA/42VA2/53VA
MXZ-2D53VA2/2D53VAH/2D53VAH2
MXZ-4D83VA/5D102VA
Outdoor fan motor
MXZ-3D54VA/3D54VA2/3D68VA/4D72VA/6D122VA
R.V. coil
Linear expansion valve
WHT
RED LEV
ORN
YLW BLU
High pressure switch (HPS)
MXZ-3D54VA2- , ,
E3 ER3 ET3
MXZ-3D68VA/4D72VA
MXZ-4D83VA/5D102VA
MXZ-6D122VA
Defrost heater
MXZ-2D53VAH/53VAH2
OBH626K
MXZ-2D42VA
MXZ-4D83VA
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)
MXZ-2D42VA
MXZ-2D42VA2
MXZ-2D33VA MXZ-2D53VA
MXZ-2D40VA MXZ-2D53VA2 MXZ-2D53VAH2
MXZ-3D54VA
MXZ-3D54VA2
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)
MXZ-2D33VA
MXZ-2D40VA
MXZ-2D42VA
MXZ-2D42VA2
MXZ-2D53VA MXZ-2D53VAH
MXZ-2D53VA2 MXZ-2D53VAH2
MXZ-4D83VA
MXZ-5D102VA
1.2 k - 1.56 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
MXZ-3D54VA2- ,
E3 ER3
MXZ-3D68VA- ,
E3 ER3
HPS
MXZ-4D72VA- ,
E3 ER3
3.43 0.15 MPa
4.41 0.1 MPa
Measure the resistance with a tester. (Part temperature : -10°C - 40°C)
Normal
349 - 428
137
MXZ-2D42VA2 MXZ-2D53VA
MXZ-5D102VA MXZ-6D122VA
Check method and criterion
Normal (Each phase)
MXZ-2D53VAH MXZ-3D68VA
MXZ-4D72VA
- 1.06 0.63
MXZ-4D83VA
MXZ-5D102VA
13.4 - 16.4
Normal
MXZ-3D54VA
MXZ-3D54VA2
MXZ-3D68VA
MXZ-4D72VA
1.26 k - 1.62 k
Normal
37.4 - 53.9
Pressure
, MXZ-3D68VA- ,
ET3 E1 E2
, MXZ-4D72VA- ,
ET3 E1 E2
, MXZ-4D83VA/5D102VA
ET3
3.7 0.3 MPa
4.8 0.2 MPa
MXZ-3D54VA2
MXZ-4D83VA
MXZ-6D122VA
MXZ-5D102VA
- 0.78 1.29 - 1.49 0.77
MXZ-6D122VA
1.24 k - 1.86 k
,
,
ER2 ET2
,
, MXZ-6D122VA
ER2 ET2
3.43 0.15 MPa Close
4.41 0.1 MPa
- 0.95
Normal
Open