Mitsubishi MXZ-2A52VA Service Manual Page 72

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72
0 10 20 30 40 50 60 70 80 90 100 110 120
700
600
500
400
300
200
100
0
Resistance (k')
Temperature (;)
Discharge temperature thermistor (RT62)
-20 -10 0 10 20 30 40
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80
200
180
160
140
120
100
80
60
40
20
0
Resistance (k')
Resistance (k')
Temperature (;)
Temperature (;)
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Gas pipe temperature thermistor (RT6A,6B,6C,6D)
Outdoor heat exchanger temperature thermistor (RT68)
Fin temperature thermistor (RT64)
LED 1
LED 2
CN801
325V DC
~
370V DC
Input
(
(
(
LEV Room
A
(
12V DC
pulse wave
(
LEV Room
B
(
12V DC
pulse wave
(
LEV Room
C
(
12V DC
pulse wave
(
LEV Room
D
(
12V DC
pulse wave
(
High pressure switch
(
Gas pipe D thermistor
(
Gas pipe C thermistor
(
Gas pipe B thermistor
(
Gas pipe A thermistor
CN932
20-90V AC
GND
5V
5V DC
pulse wave
(
To fan
motor
Defrost thermistor (RT61)
Discharge temperature thermistor (RT62)
Outdoor heat exchanger
temperature thermistor (RT68)
(
(
(+)
(–)
(+)
Rush current relay
(–)
R.V. coil (–)
(
12V
DC
15V
15V
(+)
(–)
CN931
(
CN661
CN701
Signal transmission
(To power board)
5V DC pulse wave
(+)
(–)
(
GND
CN702
Signal reception
(From power board)
5V DC pulse wave
GND (power board)
CN781
LEV E
(
(+)
(–)
(
(+)
(–)
(
(+)
(–)
(
(+)
(–)
(
CN791
CN792
CN793
CN794
CN681 MXZ-4A80VA
CN662
(
(
(
F801
FUSE
3.15A/250V
LED 3
(
Ambient temperature
thermistor (RT65)
CN663
Serial signal Room D
12~24V DC
Serial signal Room C
12~24V DC
Serial signal Room B
12~24V DC
Serial signal
Room A
12~24V DC
CN604
CN603
CN602
CN601
230V AC
50 Hz
Input
SW1
CN795
12V DC
pulse wave
2. Outdoor electronic control P.C. board
MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA
OB377--3.qxp 05.12.14 3:34 PM Page 72
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