Thermistor Resistance Check - Daikin E-Series Service Manual

SiENBE12-620

6.1.5 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=20kΩ, B=3950)
(kΩ)
150
100
50
-15 0
Tester
Resistance range
15
30 45
(°C)
Check
(R1437)
255