Mitsubishi Electric MXZ-2D33VA Service Manual page 158

MXZ-6D122VA
CN741
Signal translation
(To Communication
adaptor board)
V (Rotate signal)
FG
(Voltage between
right pins of PC931,
pin 3 and pin 4)
(Correspond to
V (Rotate instruction)
SP
(Voltage between pins
of C930): 0 V DC
(when stopped),
1.8 - 6.5 V DC
(when operated)
CNF1
To fan motor
Bus-bur voltage
290 ~ 370 VDC
15 VDC
CNDC
Bus-bur
voltage
290 ~ 370
VDC
CN63H
High
pressure
switch
OBH626K
Serial signal 12 ~ 24 V
Room B
230 VDC
Room A
Room C
Input
CN601
158
Room D Room F
Room E
CN621
CN611
LED3
LED2
LED1
Discharge temperature thermistor (RT62)
800
700
600
LEV: 12 VDC
500
pulse wave
400
300
200
100
0
0 10 20 30 40 50 60 70 80 90 100 110 120
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 0 10 20
Temperature
Thermistor R25 = 10 k ± 2%
B constant = 3950 ± 2%
1
Rt = 10exp{3950(
273+t
F711 FUSE
T3.15AL250V
CNAC
to outdoor power P.C.
board 230 VAC
Input
CN713 Valve coil
230 VAC
Input
CN712 R.V. coil
230 VAC
Input
CNTH2
Ambient temperature
thermistor
(RT65)
CNTH1
Outdoor heat exchanger
temperature thermistor
(RT68)
Discharge temperature
thermistor (RT62)
Defrost thermistor
(RT61)
SW1
SW871
SW872
SW2
Temperature( )
Thermistor R100 = 13.36 k ± 2%
B constant = 4014 ± 2%
1 1
Rt = 13.36exp{4014( )}
273+t 373
30 40 (ºC)
1
)}
298