Table 5 Table; Checking Temperature Sensor; Temperature (F) Vs. Resistance (R) Of Temperature Sensor - Bard I-TEC Series Installation Instructions Manual

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%.)
F
-25 196871
-24 190099
-23 183585
-22 177318
-21 171289
-20 165487
-19 159904
-18 154529
-17 149355
-16 144374
-15 139576
-14 134956
-13 130506
-12 126219
-11 122089
-10 118108
-9 114272
-8 110575
-7 107010
-6 103574
-5 100260
-4 97064
-3 93981
-2 91008
-1 88139
0 85371
1 82699
2 80121
3 77632
4 75230
5 72910
6 70670
7 68507
8 66418
9 64399
10 62449
11 60565
12 58745
Manual 2100-578L
Page 34 of 42

Temperature (F) vs. Resistance (R) of Temperature Sensor

R F R
13 56985
14 55284
15 53640
16 52051
17 50514
18 49028
19 47590
20 46200
21 44855
22 43554
23 42295
24 41077
25 39898
26 38757
27 37652
28 36583
29 35548
30 34545
31 33574
32 32634
33 31723
34 30840
35 29986
36 29157
37 28355
38 27577
39 26823
40 26092
41 25383
42 24696
43 24030
44 23384
45 22758
46 22150
47 21561
48 20989
49 20435
50 19896
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, it should be replaced.
TABLE 6
F R
51 19374
52 18867
53 18375
54 17989
55 17434
56 16984
57 16547
58 16122
59 15710
60 15310
61 14921
62 14544
63 14177
64 13820
65 13474
66 13137
67 12810
68 12492
69 12183
70 11883
71 11591
72 11307
73 11031
74 10762
75 10501
76 10247
77 10000
78 9760
79 9526
80 9299
81 9077
82 8862
83 8653
84 8449
85 8250
86 8057
87 7869
88 7686
F R
89 7507
90 7334
91 7165
92 7000
93 6840
94 6683
95 6531
96 6383
97 6239
98 6098
99 5961
100 5827
101 5697
102 5570
103 5446
104 5326
105 5208
106 5094
107 4982
108 4873
109 4767
110 4663
111 4562
112 4464
113 4367
114 4274
115 4182
116 4093
117 4006
118 3921
119 3838
120 3757
121 3678
122 3601
123 3526
124 3452