Mitsubishi Electric PUHZ-W112VHA Service Manual page 29

Air to water heat pump
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Low temperature thermistor
• Thermistor <Inlet water> (TH32)
Thermistor R0 = 15 kΩ ± 2.5%
B constant = 3450 ± 2%
1
1
=15exp{3450( 273+t – 273 )}
R
t
0:
15 kΩ
30:
10:
9.6 kΩ
40:
20:
6.3 kΩ
25:
5.2 kΩ
<HIGH PRESSURE SENSOR>
Vout (V)
4.5
2.5
0.5
OCH562D
4.3 kΩ
3.0 kΩ
2.5
5
PRESSURE
(MPa)
50
40
30
20
10
0
–20 –10 0
MULTI
CONTROLLER BOARD
5 V DC
3
WH
2
BU
Vout
1
BK
63HS
3–1: 5 V (DC)
2–1: Output Vout (DC)
29
10 20 30 40 50
Temperature(:)
MICRO
PROCESSOR
GND

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