Bard WH242, WH183 installation instructions Checking Temperature Sensor Outside Unit Circuit

CHECKING TEMPERATURE SENSOR OUTSIDE UNIT CIRCUIT.

1.Disconnect temperature sensor 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 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

FR

FR

FR

-25.0	196871
-24.0	190099
-23.0	183585
-22.0	177318
-21.0	171289
-20.0	165487
-19.0	159904
-18.0	154529
-17.0	149355
-16.0	144374
-15.0	139576
-14.0	134956
-13.0	130506
-12.0	126219
-11.0	122089
-10.0	118108
-9.0	114272
-8.0	110575
-7.0	107010
-6.0	103574
-5.0	100260
-4.0	97064
-3.0	93981
-2.0	91008
-1.0	88139

0.085371

1.082699

2.080121

3.077632

4.075230

5.072910

6.070670

7.068507

8.066418

9.064399

10.062449

11.060565

12.058745

13.056985

14.055284

15.053640

16.052051

17.050514

18.049028

19.047590

20.046200

21.044855

22.043554

23.042295

24.041077

25.039898

26.038757

27.037652

28.036583

29.035548

30.034545

31.033574

32.032634

33.031723

34.030840

35.029986

36.029157

37.028355

38.027577

39.026823

40.026092

41.025383

42.024696

43.024030

44.023384

45.022758

46.022150

47.021561

48.020989

49.020435

50.019896

51.019374

52.018867

53.018375

54.017898

55.017434

56.016984

57.016547

58.016122

59.015710

60.015310

61.014921

62.014544

63.014177

64.013820

65.013474

66.013137

67.012810

68.012492

69.012183

70.011883

71.011591

72.011307

73.011031

74.010762

75.010501

76.010247

77.010000

78.09760

79.09526

80.09299

81.09077

82.08862

83.08653

84.08449

85.08250

86.08057

87.07869

88.07686

89.07507

90.07334

91.07165

92.07000

93.06840

94.06683

95.06531

96.06383

97.06239

98.06098

99.05961

100.05827

101.05697

102.05570

103.05446

104.05326

105.05208

106.05094

107.04982

108.04873

109.04767

110.04663

111.04562

112.04464

113.04367

114.04274

115.04182

116.04093

117.04006

118.03921

119.03838

120.03757

121.03678

122.03601

123.03526

124.03452

Manual 2100-373

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