Thermistor Resistance Check - Daikin FTKS20CVMB Service Manual

Check

5.1.3 Thermistor Resistance Check

Remove the connectors of the thermistors on the PCB, and measure the resistance of each
Check No.6
thermistor using tester.
The relationship between normal temperature and resistance is shown in the graph and the
table below.
Temperature (°C)
–20
–15
–10
–5
0
5
10
15
20
25
30
35
40
45
50
140
Thermistor R25°C=20kΩ B=3950
211.0 (kΩ)
150
116.5
88
67.2
51.9
40
31.8
25
20
16
13
10.6
8.7
7.2
(R25=20kΩ, B=3950)
(kΩ)
150
100
50
-15 0
Tester
Resistance range
15
30 45
(°C)
SiENBE04-401A
(R1437)
Service Diagnosis