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11 Electrical checks of
main parts
Thermistor for evaporating temperature of outdoor unit in heating operation (for defrosting) (THM8)
Thermistor for condensing temperature of RAS-4H(V)RNS3E outdoor unit (THM10)
Thermistor for inverter fin temperature (THMI)
461
SMGB0087 rev.0 - 12/2013
Thermistor resistance characteristics
80
78.0
70
60
58.3
50
44.0
40
33.7
30
26.0
20.2
20
15.9
12.6
10
0
-15 -10
-5
0
5
10
15
20
Temperature (ºC)
Thermistor resistance characteristics
80
78.0
70
60
58.3
50
44.0
40
33.7
30
26.0
20.2
20
15.9
12.6
10
0
-15 -10
-5
0
5
10
15
20
Temperature (ºC)
Thermistor characteristics
38.6
22.7
13.9
8.8
Ambient temperature (ºC)
10.0
8.05
6.52
5.31
4.36
3.60
2.99
2.49
25
30
35 40
45
50
55
60
10.0
8.05
6.52
5.31
4.36
3.60
2.99
2.49
25
30
35 40
45
50
55
60
5.8
3.9
2.7
1.9
1.4
11
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