MXZ-5C42NA3 Service Manual

138
2. Outdoor power P.C. board
Output to drive compressor
Connect to earth
Connect to reactor
(Black line)
Connect to reactor
(Red line)
CNAC2
208/230 V AC
Output
CNAC1
208/230 V AC
Output
CN152 Signal Transmission (From Outdoor Control P.C. board) 5 V DC pulse wave
(
-
)
(+)
CN171
Fin temperature thermistor
(RT64)
CN151 Signal transmission
(To Outdoor control P.C. board) 5 V DC pulse wave
(+) (-) (-) 15 V 15 V
CNDC
Bus-bar voltage
290 - 370 V DC
Connect to earth
Connect to earth
F2 FUSE
10A 250V
F1 FUSE
10A 250V
208/230 V AC
Input
200
180
160
140
120
100
80
60
40
20
0
Resistance (kΩ)
Temperature
(°F)
(°C)
Fin temperature thermistor (RT64)
Thermistor R50 = 17 kΩ ± 2%
B constant = 4150 ± 3%
Rt = 17exp{4150( )}
t : ºC = (ºF - 32)/1.8
273+t
1
323
1
32 50 68 86 104 122 140 158 176
0 10 20 30 40 50 60 70 80
MXZ-3C24NA4 MXZ-3C30NA4 MXZ-4C36NA4
OBH702M