Mitsubishi Electric PUMY-HP36NKMU1, Техническое и сервисное руководство

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109
OCH733
8-8. HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Hic pipe> (TH2)
• Thermistor <Outdoor liquid pipe> (TH3)
• Thermistor <Suction pipe> (TH6)
• Thermistor <Ambient> (TH7)
32°F [0
:
] 15 k
"
50°F [10
:
] 9.6 k
"
68°F [20
:
] 6.3 k
"
77°F [25
:
] 5.2 k
"
86°F [30
:
] 4.3 k
"
104°F [40
:
] 3.0 k
"
Thermistor R0 = 15 k
"
± 3 %
B constant = 3480 ± 1 %
R
t
=15exp{3480( 273+t – 273 )}
1 1
Thermistor R120 = 7.465 k
"
± 2 %
B constant = 4057 ± 2 %
R
t
=7.465exp{4057( 273+t – 393)}
1 1
68°F [20
:
] 250 k
"
86°F [30
:
] 160 k
"
104°F [40
:
] 104 k
"
122°F [50
:
] 70 k
"
140°F [60
:
] 48 k
"
158°F [70
:
] 34 k
"
176°F [80
:
] 24 k
"
194°F [90
:
] 17.5 k
"
212°F [100
:
] 13.0 k
"
230°F [110
:
] 9.8 k
"
High temperature thermistor
• Thermistor <Compressor> (TH4)
0
10
20
30
40
50
− 20 − 10 0 10 20 30 40 50
− 4 − 14 32 50 68 86 104122
Temperature (
:
)
Temperature (ºF)
Resistance (k
"
)
500
400
300
200
100
0
25
50 75 100 120
77
122 167 212 248
Temperature (ºF)
Temperature (
:
)
Resistance (k
"
)