Thermistor Resistance Check - Daikin FTXS30HVJU Service Manual

Check

5.1.4 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 / °F)
–20 / –4
–15 / 5
–10 / 14
–5 / 23
0 / 32
5 / 41
10 / 50
15 / 59
20 / 68
25 / 77
30 / 86
35 / 95
40 / 104
45 / 113
50 / 122
 For the models in which the thermistor is directly mounted on the PCB.
108
Thermistor
R25°C(77°F)=20k B=3950
211.0 (k)
150
116.5
88
67.2
51.9
40
31.8
25
20
16
13
10.6
8.7
7.2
(R25˚C(77˚F)=20kΩ B=3950
5 32 59 86
RTH1
Tester
(R3460)
SiUS04-924
(˚C)
(˚F)
113
(R9870)
Service Diagnosis