Checking Temperature Sensor Outside Unit Circuit; Temperature Vs. Resistance Of Temperature - Bard CH3S1 Installation Instructions Manual

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.
TEMPERATURE F VS RESISTANCE R OF TEMPERATURE
F
-25.0
-24.0
-23.0
-22.0
-21.0
-20.0
-19.0
-18.0
-17.0
-16.0
-15.0
-14.0
-13.0
-12.0
-11.0
-10.0
-9.0
-8.0
-7.0
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
3. Check resistance reading to chart of resistance use
4. If sensor resistance reads very low, then sensor is
5. If sensor is out of tolerance, shorted, open, or reads
R F
196871 25.0
190099 26.0
183585 27.0
177318 28.0
29.0
171289
165487 30.0
159904 31.0
154529 32.0
149355 33.0
144374 34.0
139576 35.0
134956 36.0
130506 37.0
126219 38.0
122089 39.0
118108 40.0
114272 41.0
110575 42.0
107010 43.0
103574 44.0
100260 45.0
97064 46.0
93981 47.0
91008 48.0
88139 49.0
50.0
85371
82699 51.0
80121 52.0
77632 53.0
75230 54.0
72910 55.0
70670 56.0
68507 57.0
66418 58.0
64399 59.0
62449 60.0
61.0
60565
58745 62.0
56985 63.0
55284 64.0
65.0
53640
52051 66.0
50514 67.0
49028 68.0
47590 69.0
46200 70.0
44855 71.0
43554 72.0
42295 73.0
41077 74.0
sensor ambient temperature. (Tolerance of part is
± 10%)
shorted and will not allow proper operation of the
heat pump control.
very low ohms then it should be replaced.
R F
39898 75.0
38757 76.0
37652 77.0
36583 78.0
35548 79.0
34545 80.0
33574 81.0
32634 82.0
31723 83.0
30840 84.0
29986 85.0
29157 86.0
28355 87.0
27577 88.0
26823 89.0
26092 90.0
25383 91.0
92.0
24696
24030 93.0
23384 94.0
22758 95.0
22150 96.0
21561 97.0
20989 98.0
20435 99.0
19896 100.0
19374 101.0
18867 102.0
18375 103.0
17898 104.0
17434 105.0
16984
106.0
16547 107.0
16122 108.0
15710 109.0
15310 110.0
14921
111.0
14544 112.0
14177 113.0
13820 114.0
13474
115.0
13137 116.0
12810
117.0
12492 118.0
12183 119.0
11883 120.0
11591 121.0
11307 122.0
11031
123.0
10762 124.0
R
10501
10247
10000
9760
9526
9299
9077
8862
8653
8449
8250
8057
7869
7686
7507
7334
7165
7000
6840
6683
6531
6383
6239
6098
5961
5827
5697
5570
5446
5326
5208
5094
4982
4873
4767
4663
4562
4464
4367
4274
4182
4093
4006
3921
3838
3757
3678
3601
3526
3452
Manual 2100-455A
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