Service manual

Si18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 305
3.4.8 Thermistor Resistance Check
Check No.8 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.
Thermistor R25°C=20k
Ω
B=3950
Temperature (°C)
-20 211.0 (k
Ω
)
-15 150
-10 116.5
-5 88
067.2
551.9
10 40
15 31.8
20 25
25 20
30 16
35 13
40 10.6
45 8.7
50 7.2