OC290-24
4
[
4
3
6
2
5
[
3
2
[
2
1
[
1
[
4
[
3
[
2
[
1
Controller board
Drive circuit
Relay connector
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
5
1
3
4
6
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
Linear expansion valve
<Thermistor characteristic graph>
Room temperature thermistor(TH21)
Liquid pipe temperature thermistor(TH22)
Gas pipe temperature thermistor(TH23)
Thermistor R
0
=15k
'
± 3%
Fixed number of B=3480k
'
± 2%
Rt=15exp { 3480( ) }
30
_
F
15.8k
'
50
_
F
9.6k
'
70
_
F
6.0k
'
80
_
F
4.8k
'
90
_
F
3.9k
'
100
_
F
3.2k
'
Thermistor R
0
=6.0k
'
±5%
Fixed number of B=3390k
'
±2%
Rt=6exp { 3390( ) }
30
_
F
6.3k
'
50
_
F
3.9k
'
70
_
F
2.5k
'
80
_
F
2.0k
'
90
_
F
1.6k
'
100
_
F
1.3k
'
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 expansion valve>
1
273+(t-32)/1.8
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.
1
273+(t-32)/1.8
1
273
Thermistor for
drain sensor
0
10
20
30
40
50
0
-20
20
40
60
80
100
120
< Thermistor for lower temperature >
Temperature (
°
F)
Resistance (K
"
)
20
40
60
80
100
120
140 170
< Thermistor for drain sensor >
Temperature (
°
F)
0
1
2
3
4
5
6
7
8
9
10
Resistance (K
"
)
OC290--1.qxp 02.9.26 4:23 PM Page 24
