Mitsubishi Electric MXZ-3E54VA-E1 Service Manual page 104

,
MXZ-4E83VA -
E3
MXZ-5E102VA -
E3
CN741
Signal translation
(To Communication
adaptor board)
V (Rotate signal)
FG
(Voltage between
right pins of PC931,
pin 3 and pin 4)
(Correspond to
(CNF1 (+)- (−))
V (Rotate instruction)
SP
(Voltage between pins
of C930): 0 V DC
(when stopped),
1.8 - 6.5 V DC
(when operated)
(Same as
(CNF1 (+)- (−))
CNF1
To fan motor
Bus-bur voltage
290 ~ 370 V DC
15 V DC
CNDC
Bus-bur
voltage
290 ~ 370
V DC
CN63H
High
pressure
switch
OBH723D
,
ET3 ER2
, ,
ET3 ER2
230 V AC Room A
Input
CN601
Serial signal 12 ~ 24 V
Room B Room C Room D Room E
CN621
CN611
800
700
LEV: 12 V DC
pulse wave
600
500
400
300
200
100
0
0 10 20 30 40 50 60 70 80 90 100 110 120
104
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger temperature
thermistor (RT68)
100
90
80
70
60
50
40
30
20
10
0
-20 -10
Thermistor R25 = 10 kΩ ± 2%
B constant = 3950 ± 2%
Rt = 10exp{3950(
F711 FUSE
T3.15AL250V
CNAC
to outdoor power P.C.
board 230 V AC
Input
CN714 Defrost heater
230 V AC
Output
CN712 R.V. coil
230 V AC
Output
CNTH2
Ambient temperature
thermistor
(RT65)
CNTH1
Outdoor heat exchanger
temperature thermistor
(RT68)
Discharge temperature
thermistor (RT62)
Defrost thermistor
(RT61)
SW1
SW871
SW2
LED3
LED2
LED1
Discharge temperature thermistor (RT62)
Temperature( )
Thermistor R100 = 13.36 kΩ ± 2%
B constant = 4014 ± 2%
1
Rt = 13.36exp{4014(
273+t
0 10 20 30 40 (ºC)
Temperature
1 1
)}
273+t 298
1
)}
373