Mitsubishi Electric PKFY-P32VHM-ER2 Technical & Service Manual page 19

8-1-1. Thermistor
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R =15k" ± 3%
0
Fixed number of B=3480 ± 2%
1
Rt=15exp { 3480(
273+t
0: 15k"
10: 9.6k"
20: 6.3k"
25: 5.4k"
30: 4.3k"
40: 3.0k"
8-1-2. Liner expansion valve
1 Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the indoor controller board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the indoor controller board and the linear expansion valve>
Linear expansion valve
Blue
4
Brown
M
6
Yellow
2
5
1
3
White Red
Orange
OCH442B
Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
1
) }
273
4
3
2
1
50
(TH24)
40
30
20
10
0
Brown
Red
Blue
Orange
Yellow
White
Connector(CN60)
19 19
< Thermistor for lower temperature >
-20 -10 0 10 20 30
Temperature ( )
Controller board
DC12V
6
5
Drive circuit
4
4
3
3
2
2
1
1
40 50