Thermistor Resistance Check - Daikin FTXS20G2V1B Service Manual

SiENBE04-808_A

5.1.4 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.
„
Service Diagnosis
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)
Check
148