26
27
OCH710
0
10
20
30
40
50
-20
-10
0
10
20
30
40
50
< Thermistor for lower temperature >
Temperature (
:
)
Resistance (K
"
)
4
[
4
3
6
5
[
3
2
[
2
1
[
1
[
4
[
3
[
2
[
1
Controller board
Drive circuit
Connector(CN60)
12 V DC
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 temperature detection thermistor (TH21)
Pipe temperature detection thermistor/liquid (TH22)
Pipe temperature detection thermistor/gas (TH23)
Thermistor R
0
=15 k
"
± 3%
Fixed number of B=3480
± 2%
Rt=15exp { 3480( ) }
0
:
15 k
"
10
:
9.6 k
"
20
:
6.3 k
"
25
:
5.4 k
"
30
:
4.3 k
"
40
:
3.0 k
"
Thermistor for
lower temperature
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>
1
273+t
1
273
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.
8-1-1. Thermistor
8-1-2. Linear expansion valve
