Mitsubishi Electric PUHZ-P100VHA2, Руководство по обслуживанию

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11-7. HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Outdoor 2-phase pipe> (TH6)
• Thermistor <Outdoor> (TH7)
Thermistor R0 = 15k ' ± 3%
B constant = 3480 ± 2%
R
t
=15exp{3480( 273+t
–
273 )}
0 : 15k '
10
:
9.6k
'
20 : 6.3k '
25 : 5.2k '
0 : 180k '
25 : 50k '
50 : 17k '
70 : 8k '
90
:
4k
'
30 : 4.3k '
40
:
3.0k
'
1 1
Thermistor R50 = 17k ' ± 2%
B constant = 4150 ± 3%
R
t
=17exp{4150( 273+t
–
323)}
1 1
Thermistor R120 = 7.465k ' ± 2%
B constant = 4057 ± 2%
R
t
=7.465exp{4057( 273+t
–
393)}
1 1
Medium temperature thermistor
• Thermistor <Heatsink> (TH8)
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
"
)
200
150
100
50
0
25 50 75 100 125
Temperature ( : )
Resistance (k
"
)
500
400
300
200
100
0
25
50 75 100 120
Temperature ( : )
Resistance (k
"
)
OCH415A-2.qxp 08.2.21 8:15 AM Page 50