Ourdoor Unit Electronic Control P.c. Board - Mitsubishi Electric MXZ-18NV Service Manual

MXZ-18NV - MXZ-18NV -
E1

Ourdoor unit electronic control P.C. board

12V DC
Power
supply
Electron
expansion
valve
12V DC pulse
shape
High-pressure
switch short
(Normal)
Evaporation
temperature temperature
thermistor thermistor
2.5~4V DC
Suction
temperature temperature
thermistor thermistor
Room A coil Room A coil
thermistor thermistor
2.5~4V DC
Room B coil Room B coil
thermistor thermistor
2.5~4V DC
Discharge
temperature temperature
thermistor thermistor
0.3~0.6V DC
Power
supply
5V DC
Discharge temperature thermistor
700
600
500
400
300
200
100
0
0 10 20 30 40 50
Temperature (;)
E2
2~3V DC
LED
220 / 240V Jumper wire
Short : 220V
Open : 240V
60 70 80 90 100 110 120
Room A serial
signal
Room B serial
0~24V DC
signal
0~24V DC
Fin temperature thermistor
200
180
160
140
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80
Temperature (;)
2~3V DC
Power
supply
input
330V DC
Fuse 3A
Fin temperature Fin temperature
thermistor
(RT 63)
Relay
(X64)
Outdoor
fan Hi
220-240V AC
Solenoid valve
220-240V AC 220-240V AC
Measure the
voltage under
the condition
of the connector
pluging.
Fuse 3.15A
Outdoor fan, solenoid valve
power supply input
220-240V AC
Gas pipe temperature thermistor
Evaporation temperature thermistor
Suction temperature thermistor
Defrost temperature thermistor
100
90
80
70
60
50
40
30
20
10
0
-20 -10 0 10
Temperature (;)
20 30 40
49