Mitsubishi Electric PKFY-P15VBM-ER2 Technical & Service Manual page 20

<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'
Linear 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
Red
White
Orange
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.
OCH418C
Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
1
) }
273
4
3
2
1
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10
Controller board
6
Brown
5
Red
4
Blue
3
Orange
2
Yellow
1
White
Connector(CN60)
20
0 10 20 30 40 50
Temperature ( )
DC12V
Drive circuit
4
3
2
1