Mitsubishi Electric MXZ-2A20NA-1 Service Manual page 45

11-5. Trouble criterion of main parts
MXZ-2A20NA MXZ-2A20NA -
Part name
Defrost thermistor
(RT61)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Gas pipe temperature
thermistor (RT6A~C)
MXZ-2A20NA
MXZ-3A30NA
Discharge temperature
thermistor (RT62)
Fin temperature
thermistor (RT64)
Compressor
W
RED
V
U
WHT BLK
Outdoor fan motor
RED
(W)
U
WHT
V (V)
BLK
(U)
W
R.V. coil
Linear expansion valve
WHT
RED LEV
ORN
YLW BRN BLU
High pressure switch
(HPS)
MXZ-3A30NA
MXZ-3A30NA -
1
MXZ-3A30NA MXZ-3A30NA -
1
Measure the resistance with a tester.
Refer to 11-7. "Test point diagram and voltage",1. "Outdoor electronic control P.C.
board", 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", the chart of thermistor.
Measure the resistance between terminals using a tester.
(Winding temperature : 14˚F ~ 104˚F)
Normal (Each phase)
MXZ-2A20NA
MXZ-2A20NA
-
1
0.86Ω ~ 1.06Ω
0.39" ~ 0.49"
Measure the resistance between lead wires using a tester.
(Part temperature : 14˚F ~ 104˚F)
Normal (Each phase)
13.4" ~ 16.4"
Measure the resistance using a tester. (Part temperature : 14˚F ~ 104˚F)
Normal
1.2k" ~ 1.56k"
Measure the resistance using a tester.(Part temperature : 14˚F ~ 104˚F)
Color of lead wire
WHT - RED
RED - ORN
YLW - BRN
BRN - BLU
HPS
Check method and criterion
MXZ-3A30NA
MXZ-3A30NA -
1.29" ~ 1.49"
Normal
37.4" ~ 53.9"
Pressure
537 ± 22 PSIG
+ 7
696 PSIG
-
15
45
1
1
Normal
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