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1. Outdoor electronic control P.C. board
MUZ-GB50VA
LED 1
LED 2
CN801
325V DC
~
370V DC
Input
(
(
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
CN795
12V DC
pulse wave
LEV
(
(
(
(
-20-100 10203040
100
90
80
70
60
50
40
30
20
10
0
0 1020304050607080
200
180
160
140
120
100
80
60
40
20
0
Resistance (k")
Resistance (k")
Temperature (°C)
Temperature (°C)
Defrost thermistor (RT61)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger temperature thermistor (RT68)
Fin temperature thermistor (RT64)
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)
F801
FUSE
3.15A/250V
(
Ambient temperature
thermistor (RT65)
CN663
Serial signal
Room A
5~10V DC
CN601
230V AC
Input
(
(
10-7. Test point diagram and voltage
OB455 A--2qxp 06.7.31 2:50 PM Page 31
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31


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