MXZ-3C24NA3 Service Manual

140
CN152
Signal
Transmission
(
From Outdoor
Control P.C. board
)
5 V DC pulse wave
Output to drive compressor
CNDC
Bus-bar voltage
290 - 370 V DC
CN171
Fin temperature thermistor
(RT64)
208/230 V AC InputCNAC2
208/230 V AC
Output
CNAC1
208/230 V Output
Connect to earth
Connect
to earth
Connect
to earth
Connect to reactor
(Red line)
F2 FUSE
10A 250V
F1 FUSE
10A 250V
Connect to reactor
(White line)
( - )
(+)
CN151 Signal transmission
(To Outdoor control P.C. board) 5 V DC pulse wave
(+)
(-)
(-)
15 V 15 V
18 V
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-5C42NA4
MXZ-2C20NAHZ4
MXZ-3C24NAHZ4
MXZ-3C30NAHZ4
2. Outdoor power P.C. board
OBH702M