Electronic Control P.c. Board - Mitsubishi Electric MSH09TW Service Manual

TEST POINT DIAGRAM AND VOLTAGE
MXZ30TN MXZ30TN2

Electronic control P.C. board

Discharge temperature thermistor
0.3~0.6V DC
Evaporation temperature thermistor
2.5~4.0V DC
Fin temperature thermistor
1.0~4.0V DC
200
180
160
140
120
100
80
60
40
20
0
32 50 68 86 104 122 140 158 176
Temperature(°F)
12V DC
0~5V DC
5V DC
700
600
500
400
300
200
100
0
32 50 68 86 104 122 140 158 176 194 212 230 248
Defrost temperature thermistor
2.5~4.0V DC
R.V. coil
12V DC
-
{
+
-
-
-
-
-
-
-
{
LED monitor indication
Room A
Gas pipe temperature
thermistor 2.5~4.0V DC
Discharge temperature thermistor
Temperature(°F)
Outdoor fan
Outdoor fan
Outdoor fan
Room C
Room B
High pressure switch
97
Gas pipe temperature thermistor
Evaporation temperature thermistor
Defrost temperature thermistor
100
90
80
70
60
50
40
30
20
10
0
-4 14 32 50 68 86 104
Temperature(°F)
OFF Low High Very high
0V 12V 12V 12V
0V 12V 0V 0V
0V 0V 12V 0V
Serial signal Room C 5~10V DC
Liner expansion valve(LEV)
12V DC pulse wave
Serial signal Room B
5~10V DC
Serial signal Room A
5~10V DC
Relay 12V DC