Thermistor Resistance Check - Daikin Super Multi Plus D-Series Service Manual

Troubleshooting for RA Indoor Unit

4.6.3 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
266
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 Ω , B= 3950)
(k Ω)
150
100
50
-15 0
Tester
Resistance range
15 30 45
(°C)
SiEBE18-526
(R1437)
Troubleshooting