Daewoo DSB-071AH, Руководство по обслуживанию, Страница: 85 / 131

80
Room temperature and Evaporator temperature Sensor Input
DESCRIPTION
Number 24, 25 of Micom is Terminal of A/D convertor Input.
Room temperature and Evaporator temperature is sensing by change of Thermister Resistance, Micom is put
in 5V by ratio between R10 (12.7K
Ω
) and R11 (12.7K
Ω
).
Relation between temperature and voltage is following Table 3-1.
CC5, 6 is Noise filter.
Temperature
(°C)
No. 1 No. 3
-5 1.127 1.127
0 1.378 1.378
5 1.650 1.650
10 1.936 1.936
15 2.228 2.228
Voltage (V)
Table 3-1
Sensor(3)
070LH,091LH
182LH, 240LH
O/C SENSOR
I/C SENSOR
ROOM SENSOR
CN10
330 R8
R7
R6
330
330
CC5
103
R9
12.7kF
CC7
103
103
CC6
23
24
25
MICOM
CN9
R10
12.7KF
R11
12.7KF
V
DD
-10%
V
SS
+10%
Fig 2-1
DESCRIPTION
Oscillatory Frequency drive Micom, it is made up 8MHz resonator oscillatory Freqency.
Ocillatory wave is as following Fig 2-1.