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capacitor motor such as the compressor and fan motor. A single capacitor can be used for each
motor or a dual rated capacitor can be used for both.
The capacitor's primary function is to reduce the line current while greatly improving the torque
Resistance
Temp.℃
KΩ
-10
62.2756
-9
58.7079
-8
56.3694
-7
52.2438
-6
49.3161
-5
46.5725
-4
44
-3
41.5878
-2
39.8239
-1
37.1988
0
35.2024
1
33.3269
2
31.5635
3
29.9058
4
28.3459
5
26.8778
6
25.4954
7
24.1932
8
22.5662
9
21.8094
10
20.7184
11
19.6891
12
18.7177
13
17.8005
14
16.9341
15
16.1156
16
15.3418
1. Remove capacitor from unit.
2. Check for visual damage such as bulges, cracks, or leaks.
3. For dual rated, apply an ohmmeter lead to common (C) terminal and the other probe to the
compressor (HERM) terminal. A satisfactory capacitor will cause a deflection on the pointer, and
then gradually move back to infinity.
4. Reverse the leads of the probe and momentarily touch the capacitor terminals. The deflection
of the pointer should be two times that of the first check if the capacitor is good.
5. Repeat steps 3 and 4 to check fan motor capacitor.
NOTE: A shorted capacitor will indicate a low resistance and the pointer will move to the "0" end
of the scale and remain there as long as the probes are connected.
An open capacitor will show no movement of the pointer when placed across the terminals of the
capacitor.
10
Characteristic of temperature sensor
Resistance
Temp.℃
KΩ
17
14.6181
18
13.918
19
13.2631
20
12.6431
21
12.0561
22
11.5
23
10.9731
24
10.4736
25
10
26
9.5507
27
9.1245
28
8.7198
29
8.3357
30
7.9708
31
7.6241
32
7.2946
33
6.9814
34
6.6835
35
6.4002
36
6.1306
37
5.8736
38
5.6296
39
5.3969
40
5.1752
41
4.9639
42
4.7625
43
4.5705
16
Resistance
Temp.℃
KΩ
44
4.3874
45
4.2126
46
4.0459
47
3.8867
48
3.7348
49
3.5896
50
3.451
51
3.3185
52
3.1918
53
3.0707
54
2.959
55
2.8442
56
2.7382
57
2.6368
58
2.5397
59
2.4468
60
2.3577
61
2.2725
62
2.1907
63
2.1124
64
2.0373
65
1.9653
66
1.8963
67
1.83
68
1.7665
69
1.7055
70
1.6469
characteristics
of a motor.
The capacitor
also reduces
the line
current to the
motor by
improving the
power factor
of the load.
Run capacitor
hook-up line
side of the
capacitor is
marked with a
red dot and is
wired to the
line side of the
circuit
9.4.1
Capa
citor
test
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