Thermistor Resistance Check - Daikin C-Series Service Manual

Check

5.1.3 Thermistor Resistance Check

Check No.06 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of
each thermistor using tester.
The relationship between normal temperature and resistance is shown in the table and the
graph below.
96
Temperature (°C)
–20
–15
–10
–5
0
5
10
15
20
25
30
35
40
45
50
(kΩ)
150
100
50
For the models in which the thermistor is directly mounted on the PCB, disconnect the
connector for the PCB and measure.
Thermistor R25°C = 20 kΩ, B = 3950
211.0 (kΩ)
150.0
116.5
88.0
67.2
51.9
40.0
31.8
25.0
20.0
16.0
13.0
10.6
8.7
7.2
-15 0 15 30
RTH1
Tester
(R3460)
45
(˚C)
(R11905)
Tester
Resistance range
(R11906)
Service Diagnosis
SiBE07-618_C