Troubleshooting for RA Indoor Unit SiEBE18-526
266 Troubleshooting
4.6.3 Thermistor Resistance Check
Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each
thermistor using tester.
The relationship between normal temperature and resistance is shown in the graph and the
table below.
Thermistor R25°C=20kΩ B=3950
Temperature (°C)
-20 211.0 (kΩ)
-15 150
-10 116.5
-5 88
0 67.2
5 51.9
10 40
15 31.8
20 25
25 20
30 16
35 13
40 10.6
45 8.7
50 7.2
Tester
150
100
50
-15 15 3045
(°C)
0
(R25 = 20k Ω , B= 3950)
(k Ω)
Resistance range
(R1437)
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