Mitsubishi Electric MXZ-2B20NA Service Manual page 23

11-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-2B20NA MXZ-2B20NA -
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
RED
U (W)
WHT
(V)
V
BLK
W (U)
R.V. coil
Linear expansion valve
MXZ-2B20NA
WHT
LEV
RED
ORN
YLW BRN BLU
MXZ-2B20NA -
1
WHT
LEV
RED
ORN
YLW BLU
1
Measure the resistance with a tester.
Refer to 11-7. "Test point diagram and voltage",1. "Outdoor electronic control P . C.
board", or 3. "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", for the chart of thermistor.
Measure the resistance between terminals using a tester.
(Winding temperature: 14°F ~ 104°F)
Normal (Each phase)
0.86 Ω ~ 1.06 Ω
Measure the resistance between lead wires using a tester.
(Part temperature: 14°F ~ 104°F)
Normal (Each phase)
MXZ-2B20NA
13.4 Ω ~ 16.4 Ω
Measure the resistance using a tester. (Part temperature: 14°F ~ 104°F)
Normal
1.2 k Ω ~1.56 kΩ
Measure the resistance using a tester. (Part temperature: 14°F ~ 104°F)
Color of lead wire
MXZ-2B20NA MXZ-2B20NA -
WHT - RED
WHT - RED
RED - ORN
RED - ORN
BRN
YLW -
YLW - RED
BRN
- BLU
RED - BLU
Check method and criterion
MXZ-2B20NA -
1
13 Ω ~ 16 Ω
Normal
1
37.4 Ω ~ 53.9 Ω
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