MXZ-5C42NA3 Service Manual

136
2. Outdoor power P.C. board
Output to drive compressor
Connect to earth
Connect to reactor
(Red line)
Connect to reactor
(White line)
CNDC
Bus-bar voltage
290 - 370 V DC
CNAC1
208/230 V AC
Output
F2 FUSE
T6.3AL250V
F1 FUSE
T6.3AL250V
208/230 V AC
Input
CNAC2
208/230 V AC
Output
Connect to earth
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
MXZ-2C20NA2 MXZ-2C20NA3 MXZ-2C20NA4
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
OBH702M