23
<Thermistor Characteristic Graph>
Thermistor (TH21)
(Room temperature detection)
Thermistor (TH22)
(Pipe temperature detection/ Liquid)
Thermistor (TH23)
(Pipe temperature detection/ Gas)
Thermistor R
0
=15 kΩ
± 3%
Fixed number of B=3480
± 2%
Rt=15exp { 3480( ) }
0
:
15 kΩ
10
:
9.6 kΩ
20
:
6.3 kΩ
25
:
5.4 kΩ
30
:
4.3 kΩ
40
:
3.0 kΩ
Thermistor R
0
=6.0 kΩ
±5%
Fixed number of B=3390
±2%
Rt=6exp { 3390( ) }
0
:
6.0 kΩ
10
:
3.9 kΩ
20
:
2.6 kΩ
25
:
2.2 kΩ
30
:
1.8 kΩ
40
:
1.3 kΩ
60
:
0.6 kΩ
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
[
4
[
3
[
3
[
2
[
2
[
1
[
1
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
1
Operation summary of the linear expansion valve
• Linear expansion valves open/close through the use of a stepping motor after receiving the pulse signal from the indoor
controller board.
• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>
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
1
273
-20
0
20
40
60
80
< Thermistor for drain sensor >
Temperature (
:
)
0
1
2
3
4
5
6
7
8
9
10
Resistance (k
"
)
Linear expansion valve
Thermistor for
lower temperature
1
273+t
1
273
Thermistor for
drain sensor
OCH569
