Mitsubishi Electric MXZ-3E54VA-E1 Service Manual page 103

MXZ-4E83VA -
E1
MXZ-5E102VA -
MXZ-2E53VAHZ
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
, , , ,
E2 ET1 ET2 ER1
, , , ,
E1 E2 ET1 ET2 ER1
230 V AC Room A
Input
CN741
Signal translation
(To Communication
adaptor board)
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
103
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)
0 10 20 30 40 50 60 70 80 90 100 110 120
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