14
0
10
20
30
40
50
-20
-10
0
10
20
30
40
50
< Thermistor for lower temperature >
Temperature
(˚C)
-4
14
32
50
68
86
104 122 [˚F]
Resistance (k
Ω
)
4
ø4
3
6
5
ø3
2
ø2
1
ø1
ø4
ø3
ø2
ø1
Controller board
Drive circuit
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
Linear expansion valve
<Thermistor Characteristic graph>
Room temparature thermistor(TH21)
Liquid pipe thermistor(TH22)
Gas pipe temparature thermistor(TH23)
Drain sensor(DS)
Thermistor R
0
=15k
Ω ±
3%
Fixed number of B=3480k
Ω ±
2%
Rt=15exp { 3480( ) }
0˚C
15k
Ω
10˚C
9.6k
Ω
20˚C
6.3k
Ω
25˚C
5.2k
Ω
30˚C
4.3k
Ω
40˚C
32˚F
50˚F
68˚F
77˚F
86˚F
104˚F
3.0k
Ω
Thermistor for
lower temperature
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>
1
273+t
1
273
