CHECKING TEMPERATURE SENSOR OUTSIDE UNIT CIRCUIT

1.Disconnect temperature sensor from board and from outdoor coil.

2.Use an ohmmeter and measure the resistance of the sensor. Also use ohmmeter to check for short or open.

3.Check resistance reading to chart of resistance use sensor ambient temperature. (Tolerance of part is

± 10%)

4.If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the heat pump control.

5.If sensor is out of tolerance, shorted, open, or reads very low ohms then it should be replaced.

TEMPERATURE F VS RESISTANCE R OF TEMPERATURE

 

F

R

F

R

F

R

F

R

 

 

-25

196871

13

56985

51

19374

89

7507

 

 

-24

190099

14

55284

52

18867

90

7334

 

 

-23

183585

15

53640

53

18375

91

7165

 

 

-22

177318

16

52051

54

17989

92

7000

 

 

-21

171289

17

50514

55

17434

93

6840

 

 

-20

165487

18

49028

56

16984

94

6683

 

 

-19

159904

19

47590

57

16547

95

6531

 

 

-18

154529

20

46200

58

16122

96

6383

 

 

-17

149355

21

44855

59

15710

97

6239

 

 

-16

144374

22

43554

60

15310

98

6098

 

 

-15

139576

23

42295

61

14921

99

5961

 

 

-14

134956

24

41077

62

14544

100

5827

 

 

-13

130506

25

39898

63

14177

101

5697

 

 

-12

126219

26

38757

64

13820

102

5570

 

 

-11

122089

27

37652

65

13474

103

5446

 

 

-10

118108

28

36583

66

13137

104

5326

 

 

-9

114272

29

35548

67

12810

105

5208

 

 

-8

110575

30

34545

68

12492

106

5094

 

 

-7

107010

31

33574

69

12183

107

4982

 

 

-6

103574

32

32634

70

11883

108

4873

 

 

-5

100260

33

31723

71

11591

109

4767

 

 

-4

97064

34

30840

72

11307

110

4663

 

 

-3

93981

35

29986

73

11031

111

4562

 

 

-2

91008

36

29157

74

10762

112

4464

 

 

-1

88139

37

28355

75

10501

113

4367

 

 

0

85371

38

27577

76

10247

114

4274

 

 

1

82699

39

26823

77

10000

115

4182

 

 

2

80121

40

26092

78

9760

116

4093

 

 

3

77632

41

25383

79

9526

117

4006

 

 

4

75230

42

24696

80

9299

118

3921

 

 

5

72910

43

24030

81

9077

119

3838

 

 

6

70670

44

23384

82

8862

120

3757

 

 

7

68507

45

22758

83

8653

121

3678

 

 

8

66418

46

22150

84

8449

122

3601

 

 

9

64399

47

21561

85

8250

123

3526

 

 

10

62449

48

20989

86

8057

124

3452

 

 

11

60565

49

20435

87

7869

 

 

 

 

12

58745

50

19896

88

7686

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Manual

2100-455M

Page

22 of 28

Page 22
Image 22
Bard CH5S1, CH4S1, CH3S1 Checking Temperature Sensor Outside Unit Circuit, Temperature F VS Resistance R of Temperature

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