Thermistor Resistance Check - Daikin F-Series Service Manual

SiEN12-710A

5.1.5 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.
Temperature (°C)
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
Service Diagnosis
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=20k
Tester
Resistance range
B=3950)
Check
149