CHECKING TEMPERATURE SENSOR CHECK OUT

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 SENSOR

 

F

R

F

R

F

R

F

R

-25.0

196871

15.0

53640

55.0

17434

95.0

6531

-24.0

190099

16.0

52051

56.0

16984

96.0

6383

-23.0

183585

17.0

50514

57.0

16547

97.0

6239

-22.0

177318

18.0

49028

58.0

16122

98.0

6098

-21.0

171289

19.0

47590

59.0

15710

99.0

5961

-20.0

165487

20.0

46200

60.0

15310

100.0

5827

-19.0

159904

21.0

44855

61.0

14921

101.0

5697

-18.0

154529

22.0

43554

62.0

14544

102.0

5570

-17.0

149355

23.0

42295

63.0

14177

103.0

5446

-16.0

144374

24.0

41077

64.0

13820

104.0

5326

-15.0

139576

25.0

39898

65.0

13474

105.0

5208

-14.0

134956

26.0

38757

66.0

13137

105.0

5094

-13.0

130506

27.0

37652

67.0

12810

107.0

4982

-12.0

126219

28.0

36583

68.0

12492

108.0

4873

-11.0

122089

29.0

35548

69.0

12183

109.0

4767

-10.0

118108

30.0

34545

70.0

11883

110.0

4663

-9.0

114272

31.0

33574

71.0

11591

111.0

4562

-8.0

110575

32.0

32634

72.0

11307

112.0

4464

-7.0

107010

33.0

31723

73.0

11031

113.0

4367

-6.0

103574

34.0

30840

74.0

10762

114.0

4274

-5.0

100260

35.0

29986

75.0

10501

115.0

4182

-4.0

97064

36.0

29157

76.0

10247

116.0

4093

-3.0

93981

37.0

28355

77.0

10000

117.0

4006

-2.0

91008

38.0

27577

78.0

9760

118.0

3921

-1.0

88139

39.0

26823

79.0

9526

119.0

3838

0.0

85371

40.0

26092

80.0

9299

120.0

3757

1.0

82699

41.0

25383

81.0

9077

121.0

3678

2.0

80121

42.0

24696

82.0

8862

122.0

3601

3.0

77632

43.0

24030

83.0

8653

123.0

3526

4.0

75230

44.0

23384

84.0

8449

124.0

3452

5.0

72910

45.0

22758

85.0

8250

 

 

6.0

70670

46.0

22150

86.0

8057

 

 

7.0

68507

47.0

21561

87.0

7869

 

 

8.0

66418

48.0

20989

88.0

7686

 

 

9.0

64399

49.0

20435

89.0

7507

 

 

10.0

62449

50.0

19896

90.0

7334

 

 

11.0

60565

51.0

19374

91.0

7165

 

 

12.0

58745

52.0

18867

92.0

7000

 

 

13.0

56985

53.0

18375

93.0

6840

 

 

14.0

55284

54.0

17898

94.0

6683

 

 

 

 

 

 

 

 

 

 

Manual 2100-344 Page 16

Page 18
Image 18
Bard PH1230, PH1236, PH1224 Checking Temperature Sensor Check OUT, Temperature Resistance Temperature Sensor

PH1224, PH1236, PH1230 specifications

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