Linear Expansion Valve - Mitsubishi Electric PLFY-P32VBM-E Technical & Service Manual

9-1-1. 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'
9-1-2.

Linear expansion valve

1 Operation summary of the linear expansion valve
• Linear expansion valves open/close through the use of a stepping motor after receiving the pulse signal from the indoor
controller board.
• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>
Linear expansion valve
M
1 3
5
1
White Red
Orange
OCH413D
Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
1
) }
273
Blue
4
4
Brown
6
2
Yellow
2
3
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0
Controller board
DC12V
6
Brown
5
Red
4
Blue
3
Orange
2
Yellow
1
White
Connector(CN60)
26
10 20 30 40 50
Temperature ( )
Drive circuit
4
3
2
1