Sensor(3)

Room temperature and Evaporator temperature Sensor Input

EVA

CN10

5V

R32

 

1

 

5

 

 

 

PT-K43C

2

R37

330

 

3

CA1

MUX

 

12.7K

Room

4

104

 

 

 

SMW250-04

 

R31

 

PT-K43C

 

 

1

 

 

 

 

 

R38

330

 

 

 

 

CA1

 

 

12.7K

 

 

 

 

104

 

 

 

 

23 MICOM

DESCRIPTION

Number 23 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 R37 (12.7KΩ ) and R38 (12.7KΩ ).

Relation between temperature and voltage is following Table 3-1. CA1 is Noise filter.

Resistance & Voltage of the Sensor

temp(°C)

resistance1(Ω )

Vout(V)

 

 

temp(°C)

resistance1(Ω )

Vout(V)

 

 

temp(°C)

resistance1(Ω )

Vout(V)

 

 

 

 

 

 

 

 

 

 

 

 

 

–10

54,769

0.941

17

14,288

2.353

 

 

44

4,526

3.686

–9

52,070

0.980

18

13,629

2.412

 

 

45

4,435

3.706

–8

49,579

1.020

19

13,002

2.471

 

 

46

4,255

3.745

–7

47,272

1.059

20

12,405

2.529

47

4,080

3.784

–6

44,116

1.118

 

 

 

 

 

48

3,908

3.824

21

12,021

2.569

–5

42,190

1.157

 

 

22

11,468

2.627

49

3,739

3.863

–4

40,390

1.196

 

 

23

10,939

2.686

50

3,656

3.882

–3

37,902

1.255

 

 

24

10,432

2.745

 

 

 

 

 

 

 

51

3,493

3.922

–2

36,368

1.294

 

 

25

9,947

2.804

 

 

52

3,332

3.961

–1

34,235

1.353

26

9,634

2.843

 

 

53

3,253

3.980

0

32,279

1.412

27

9,182

2.902

 

 

54

3,098

4.020

1

31,064

1.451

28

8,890

2.941

 

 

55

3,021

4.039

2

29,358

1.510

29

8,467

3.000

 

 

56

2,870

4.078

3

27,781

1.569

30

8,060

3.059

57

2,795

4.098

4

26,794

1.608

 

 

 

 

 

58

2,721

4.118

31

7,79,

3.095

5

25,400

1.667

 

 

32

7,415

3.157

59

2,576

4.157

6

24,101

1.725

 

 

33

7,168

3.196

60

2,504

4.176

7

22,888

1.784

 

 

34

6,809

3.255

 

 

61

2,433

4.196

8

21,752

1.843

 

 

35

6,577

3.294

 

 

62

2,363

4.216

9

20,687

1.902

36

6,239

3.353

 

 

63

2,293

4.235

10

19,685

1.961

37

6,020

3.392

 

 

64

2,156

4.275

11

19,050

2.000

38

5,806

3.431

 

 

65

2,088

4.294

12

18,143

2.059

39

5,597

3.471

 

 

66

2,020

4.314

13

17,286

2.118

40

5,392

3.510

67

1,954

4.333

14

16,476

2.176

 

 

 

 

 

68

1,888

4.353

41

5,094

3.569

15

15,708

2.235

 

 

42

4,901

3.608

69

1,822

4.373

16

14,979

2.294

 

 

43

4,711

3.647

70

1,758

4.392

 

 

 

 

 

 

 

 

 

 

 

 

 

24

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Image 25
Daewoo DPB-280LH service manual Sensor3, Resistance & Voltage of the Sensor
Page 24 Page 26

DPB-280LH specifications

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