Mitsubishi MXZ-8B140VA Technical & Service Manual page 39

<Thermistor feature chart>
Low temperature thermistors
Pipe temperature thermistor <Liquid> (TH3)
Pipe temperature thermistor <Cond.> (TH6)
Outdoor temperature thermistor (TH7)
Gas pipe temperature thermistor (TH-A ~ TH-E)···· Branch box
Thermistor R0 = 15 k" ± 3 %
B constant = 3480 ± 2 %
1 1
=15exp{3480( 273+t – 273 )}
R
t
0 : 15 k" 30 :
10 : 9.6 k" 40 :
20 : 6.3 k"
25 : 5.4 k"
Medium temperature thermistor
Heatsink temperature thermistor (TH8)
Thermistor R50 = 17 k" ± 2%
B constant = 4170 ± 3%
1 1
=17exp{4170( 273+t – 323 )}
R
t
0 : 180 k"
25 : 50 k"
50 : 17 k"
70 : 8 k"
90 : 4 k"
High temperature thermistor
Compressor temperature thermistor (TH4)
Thermistor R120 = 7.465 k" ± 2 %
B constant = 4057 ± 2%
1
=7.465exp{4057( 273+t – 393 )}
R
t
20 : 250 k" 70 :
30 : 160 k" 80 :
40 : 104 k" 90 :
50 : 70 k" 100 : 13.0 k"
60 : 48 k" 110 :
<HIGH PRESSURE SENSOR>
Vout (V)
4.5
2.5
0.5
2.5
OCH480D
4.3 k"
3.0 k"
1
34 k"
24 k"
17.5 k"
9.8 k"
Vout
3-1 : 5V (DC)
5
2-1 : Output Vout (DC)
PRESSURE
(MPa)
50
40
30
20
10
0
-20 -10
200
150
100
50
0
500
400
300
200
100
0
OUTDOOR
CONTROLLER
CIRCUIT BOARD
5V DC
3
WHT
2
BLU
MICRO
PROCESSOR
1
BLK
GND
63HS
39
0 10 20 30 40 50
Temperature (:)
25 50 75 100110 125
Temperature (:)
50 75 100 120
25
Temperature (:)