50
10-7. HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Outdoor 2-phase pipe> (TH6)
• Thermistor <Outdoor> (TH7)
0
15k
10
9.6k
20
6.3k
25
5.2k
30
4.3k
40
3.0k
Thermistor R0 = 15k
± 3%
B constant = 3480 ± 2%
R
t
=15exp{3480( 273+t
–
273 )}
1
1
Thermistor R120 = 7.465k
± 2%
B constant = 4057 ± 2%
R
t
=7.465exp{4057( 273+t
–
393)}
1
1
20
250k
30
160k
40
104k
50
70k
60
48k
70
34k
80
24k
90
17.5k
100
13.0k
110
9.8k
High temperature thermistor
• Thermistor <Discharge> (TH4)
0
10
20
30
40
50
-20 -10
0
10
20
30
40
50
Temperature (
)
Resistance (k
)
500
400
300
200
100
0
25
50
75
100
120
Temperature (
)
Resistance (k
)
