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MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA
LED 1
LED 2
F931
FUSE
T3.15AL250V
(
CN932
20-90 V AC
GND
5 V DC
5 V DC
pulse wave
(
To fan
motor
(+)
(–)
Rush current relay
(–)R.V. coil
CN781
CN663
CN701
CN702
CN661
CN681
High pressure switch
(
Bus-bar voltage
CN801
294~370 V DC
Input
LED 3
Serial signal
Room A
12~24 V DC
CN611
Serial signal Room B
12~24 V DC
CN621
Serial signal Room C
12~24 V DC
CN601
208/230 V AC
Input
SW1
SW2
SW871
F801
FUSE
T3.15AL250V
CN791
LEV Room A
CN792
LEV Room B
CN793
LEV Room C
(
(
–
+
{
CN796
LEV F
12 V DC
pulse wave
Defrost thermistor (RT61)
Discharge temperature thermistor (RT62)
Outdoor heat exchanger
temperature thermistor (RT68)
Ambient temperature
thermistor (RT65)
Signal transmission
(To power board)
5 V DC pulse wave
Signal reception
(From power board)
5 V DC pulse wave
GND
GND
15 V DC
-4 14 32 50 68 86 104
100
90
80
70
60
50
40
30
20
10
0
Resistance (kΩ)
Temperature (°F)
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger
temperature thermistor (RT68)
CN794
LEV Room D
CN631
Serial signal Room D
12~24 V DC
700
600
500
400
300
200
100
0
Resistance (kΩ)
Temperature (°F)
Discharge temperature thermistor (RT62)
32
50 68 86 104 122 140 158 176 194 212 230 248