Hitachi UTOPIA RAS-4HVRP2E - Thermistors for RAS-(4-6)H(V)(R;N)(C;P)2 E

8 Electrical checks of main parts
Thermistor
SMGB0136 rev.0 - 07/2021
166

Thermistor for evaporating temperature of outdoor unit in heating operation (for defrosting)
(THM8)
80
70
60
50
40
30
20
10
0
-15 -10 -5 0510 15 20 25 30 35 40 45 50 55 60
26.0
20.2
15.9
12.6
10.0
8.05
5.31
3.60
2.49
33.7
44.0
58.3
78.0
6.52
4.36
2.99
Thermistor resistance characteristics
Temperature (ºC)
Thermistor resistance (kΩ)

Thermistor for condensing temperature (THM10)
80
70
60
50
40
30
20
10
0
-15 -10 -5 0510 15 20 25 30 35 40 45 50 55 60
26.0
20.2
15.9
12.6
10.0
8.05
5.31
3.60
2.49
33.7
44.0
58.3
78.0
6.52
4.36
2.99
Thermistor resistance characteristics
Ambient temperature (ºC)
Thermistor resistance (kΩ)
8.2.2 Thermistors for RAS-(4-6)H(V)(R/N)(C/P)2E
Thermistor for
Discharge Gas
Temperature
(THM9)
Thermistor for
Condenser
Temperature
(THM10)
Thermistor for
Outdoor Ambient
Temperature
(THM7)
Thermistor for
Pipe Evaporating
Temperature
(THM8)