Bard CH5S1 Manual Do Utilizador

Manual 2100-455M

Page 22 of 28

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

-25

196871

56985

19374

7507

-24

190099

55284

18867

7334

-23

183585

53640

18375

7165

-22

177318

52051

17989

7000

-21

171289

50514

17434

6840

-20

165487

49028

16984

6683

-19

159904

47590

16547

6531

-18

154529

46200

16122

6383

-17

149355

44855

15710

6239

-16

144374

43554

15310

6098

-15

139576

42295

14921

5961

-14

134956

41077

14544

100

5827

-13

130506

39898

14177

101

5697

-12

126219

38757

13820

102

5570

-11

122089

37652

13474

103

5446

-10

118108

36583

13137

104

5326

-9

114272

35548

12810

105

5208

-8

110575

34545

12492

106

5094

-7

107010

33574

12183

107

4982

-6

103574

32634

11883

108

4873

-5

100260

31723

11591

109

4767

-4

97064

30840

11307

110

4663

-3

93981

29986

11031

111

4562

-2

91008

29157

10762

112

4464

-1

88139

28355

10501

113

4367

85371

27577

10247

114

4274

82699

26823

10000

115

4182

80121

26092

9760

116

4093

77632

25383

9526

117

4006

75230

24696

9299

118

3921

72910

24030

9077

119

3838

70670

23384

8862

120

3757

68507

22758

8653

121

3678

66418

22150

8449

122

3601

64399

21561

8250

123

3526

62449

20989

8057

124

3452

60565

20435

7869

58745

19896

7686