Mitsubishi Electric MXZ-2A20NA-1 Service Manual page 53

11-7. Test point diagram and voltage
1. Outdoor electronic control P.C. board
MXZ-2A20NA MXZ-2A20NA -
Discharge temperature thermistor (RT62)
700
600
500
400
300
200
100
0
32 50 68 86 104 122 140 158 176 194 212 230 248
Temperature (˚F)
LED 1
LED 2
LED 3
SW1
CN801
294V DC
~
370V DC
Input
F801
FUSE
T3.15AL250V
MXZ-3A30NA
1
200
180
160
140
120
100
80
60
40
20
53
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Gas pipe temperature thermistor (RT6A,6B,6C)w
Fin temperature Outdoor heat exchanger temperature
thermistor (RT64) thermistor (RT68)
100
90
80
70
60
50
40
30
0
20
32 50 68 86 104 122 140 158 176
Temperature (˚F)
10
0
-4 -14 32 50 68 86 104
Temperature (˚F)
w Except MXZ-2A20NA -
.
1
CN603
Serial signal Room C
12~24V DC
CN602
Serial signal Room B
12~24V DC
CN601
208/230V AC
Input
Serial signal
Room A
12~24V DC