Mitsubishi Electric PVFY Series Technical & Service Manual page 15

<Thermistor Characteristic graph>
Room temparature thermistor(TH21)
Thermistor for
Liquid pipe thermistor(TH22)
lower temperature
Gas pipe temparature thermistor(TH23)
Thermistor R =15k
0
Fixed number of B=3480k
1
Rt=15exp { 3480(
273+t
0°C 32°F 15k
10°C 50°F 9.6k
20°C 68°F 6.3k
25°C 77°F 5.2k
30°C 86°F 4.3k
40°C 104°F 3.0k
Linear expansion valve
1 Operation summary of the linear expansion valve.
• Linear expansion valve open/close 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 expasion valve>
Linear expansion valve
Blue
4
Brown
M
6
Yellow
2
5
1
3
White Red
Orange
15
3%
2%
1
) }
273
ø4
ø3
ø2
ø1
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0 10
-4 14 32 50
Temperature
Controller board
DC12V
6
Brown
5
Red
4
Blue
3
Orange
2
Yellow
1
White
Connector(CN60)
Specifications are subject to change without notice.
(°C)
20 30 40 50
104 122 [°F]
68 86
Drive circuit
ø4
ø3
ø2
ø1
© 2013 Mitsubishi Electric US, Inc.