Hitachi UTOPIA RAS-4HVRP2E Service Manual page 170

8 Electrical checks of main parts
Thermistor

Thermistor for evaporating temperature of outdoor unit in heating operation (for defrosting)
(THM8)

Thermistor for condensing temperature of RAS-(4-6)H(V)(R/N)(C/P)2E outdoor unit (THM10)
168 SMGB0136 rev.0 - 07/2021
Thermistor resistance characteristics
80
78.0
70
60
58.3
50
44.0
40
33.7
30
26.0
20.2
20
15.9
12.6
10
0
-15 -10 -5 0 5 10 15 20
Temperature (ºC)
Thermistor resistance characteristics
80
78.0
70
60
58.3
50
44.0
40
33.7
30
26.0
20.2
20
15.9
12.6
10
0
-15 -10 -5 0 5 10 15 20
Temperature (ºC)
10.0
8.05
6.52
5.31
4.36
3.60 2.99
2.49
25 30 35 40 45 50 55 60
10.0
8.05
6.52
5.31
4.36
3.60 2.99
2.49
25 30 35 40 45 50 55 60