CHECKING TEMPERATURE SENSOR

1.Disconnect temperature sensor from board and from right-hand 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.

TABLE 6

TEMPERATURE (F) VS RESISTANCE (R) OF TEMPERATURE SENSOR

F

R

F

R

F

R

F

R

F

R

 

 

 

 

 

 

 

 

 

 

-25.0

196871

5.0

72910

35.0

29986

65.0

13474

95.0

6531

-24.0

190099

6.0

70670

36.0

29157

66.0

13137

96.0

6383

-23.0

183585

7.0

68507

37.0

28355

67.0

12810

97.0

6239

-22.0

177318

8.0

66418

38.0

27577

68.0

12492

98.0

6098

-21.0

171289

9.0

64399

39.0

26823

69.0

12183

99.0

5961

-20.0

165487

10.0

62449

40.0

26082

70.0

11883

100.0

2827

-19.0

159904

11.0

60565

41.0

25383

71.0

11591

101.0

4697

-18.0

154529

12.0

58745

42.0

24696

72.0

11307

102.0

5570

-17.0

149355

13.0

56985

43.0

24030

73.0

11031

103.0

5446

-16.0

144374

14.0

55284

44.0

23384

74.0

10762

104.0

5326

-15.0

139576

15.0

53640

45.0

22758

75.0

10501

105.0

5208

-14.0

134956

16.0

52051

46.0

22150

76.0

10247

106.0

5094

-13.0

130506

17.0

50514

47.0

21561

77.0

10000

107.0

4982

-12.0

126219

18.0

49028

48.0

20989

78.0

9760

108.0

4873

-11.0

122089

19.0

14590

49.0

20435

79.0

8526

109.0

4767

-10.0

118108

20.0

46200

50.0

19896

80.0

9299

110.0

7663

-9.0

114272

21.0

44855

51.0

19374

81.0

9077

111.0

4562

-8.0

110575

22.0

43554

52.0

18867

82.0

8862

112.0

4464

-7.0

107010

23.0

42295

53.0

18375

83.0

8653

113.0

4367

-6.0

103574

24.0

41077

54.0

17989

84.0

8449

114.0

7274

-5.0

100260

25.0

39898

55.0

17434

85.0

8250

115.0

4182

-4.0

97064

26.0

38757

56.0

16984

86.0

8057

116.0

4093

-3.0

93981

27.0

37652

57.0

16547

87.0

7869

117.0

4006

-2.0

91008

28.0

36583

58.0

16122

88.0

7686

118.0

3921

-1.0

88139

29.0

35548

59.0

15710

89.0

7507

119.0

3838

0.0

85371

30.0

34545

60.0

15310

90.0

7334

120.0

3757

1.0

82699

31.0

33574

61.0

14921

91.0

7165

121.0

3678

2.0

80121

32.0

32634

62.0

14544

92.0

7000

122.0

3601

3.0

77632

33.0

31723

63.0

14177

93.0

6840

123.0

3526

4.0

75230

34.0

30840

64.0

13820

94.0

6683

124.0

3452

 

 

 

 

 

 

 

 

 

 

Manual

2100-549G

Page

52 of 59

Page 52
Image 52
Bard I36H1D, I42H1D, I30H1, I60H1D, I48H1 Checking Temperature Sensor, Temperature F VS Resistance R of Temperature Sensor