Mitsubishi Electric MXZ-2C20NA2 Service Manual page 137

2. Outdoor power P.C. board
MXZ-3C24NA MXZ-3C24NA2 MXZ-3C24NA3
MXZ-3C30NA MXZ-3C30NA2 MXZ-3C30NA3
MXZ-4C36NA MXZ-4C36NA2 MXZ-4C36NA3
Output to drive compressor
Connect to reactor
(Red line)
Fin temperature thermistor (RT64)
200
180
160
140
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80
32 50 68 86 104 122 140 158 176
Temperature
Thermistor R50 = 17 kΩ ± 2%
B constant = 4150 ± 3%
1
Rt = 17exp{4150(
273+t
t : ºC = (ºF - 32)/1.8
OBH702N
Connect to reactor
(White line)
(°C)
(°F)
1
)}
323
CN171
Fin temperature thermistor
(RT64)
CNDC
Connect to earth
Bus-bar voltage
290 - 370 V DC
137
(-) CN152
Signal Transmission
(+)
(From Outdoor
Control P.C. board)
5 V DC pulse wave
Connect to earth
CNAC2
208/230 V AC
Output
F1 FUSE
T6.3AL250V
208/230 V AC
Input
F2 FUSE
T6.3AL250V
CNAC1
208/230 V AC Output