Mitsubishi Electric MXZ-2B20NA Service Manual page 31

11-7. TEST POINT DIAGRAM AND VOLTAGE
1. Outdoor electronic control P.C. board
MXZ-2B20NA MXZ-2B20NA -
LED 1
LED 2
LED 3
SW1
Bus-bar
voltage
CN801
294 V DC
~
370 V DC
Input
F801
FUSE
T3.15AL250V
Discharge temperature thermistor (RT62)
700
1
600
500
400
300
200
100
0
32 50 68 86 104 122 140 158 176 194 212 230 248
Temperature (°F)
31
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger temperature
thermistor (RT68)
100
90
80
70
60
50
40
30
20
10
0
-4 14 32 50 68 86 104
Temperature (°F)
CN602
Serial signal Room B
12~24 V DC
CN601
208/230 V AC
Input
Serial signal
Room A
12~24 V DC