Toshiba MXZ-2DM40VA Service Manual page 33

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-2DM40VA MXZ-3DM50VA
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
WHT BLK
Outdoor fan motor
WHT RED BLK
2 3
1
W
V
U
MXZ-2DM40VA
Outdoor fan motor
MXZ-3DM50VA
R.V. coil
Linear expansion valve
WHT
LEV
RED
ORN
YLW BLU
High pressure switch (HPS)
MXZ-3DM50VA
OBH739A
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-2DM40VA MXZ-3DM50VA
U
1.49 - 1.84
Measure the resistance between lead wires with a tester.
(Part temperature: -10 °C - 40 °C)
Normal (Each phase)
MXZ-2DM40VA
MXZ-3DM50VA
Refer to 11-6.
Measure the resistance with a tester. (Part temperature: -10 °C - 40 °C)
MXZ-2DM40VA
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
HPS
Check method and criterion
0.86 - 1.06
12 - 16
.
Normal
MXZ-3DM50VA
1.26 k - 1.62 k
37.4
MXZ-3DM50VA
Pressure
3.43 0.15 MPa
4.41 0.10 MPa
33
Normal
- 53.9
Normal
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