19
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
2
5
[
3
2
[
2
1
[
1
[
4
[
4
[
3
[
3
[
2
[
2
[
1
[
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
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>
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.
-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 characteristic graph>
Thermistor (TH21)
(Room temperature detection)
Thermistor (TH22)
(Pipe temperature detection/ Liquid)
Thermistor (TH23)
(Pipe temperature detection/ Gas)
Thermistor R
0
=15k
'
± 3%
Fixed number of B=3480K ± 2%
Rt=15exp { 3480( ) }
0
:
15k
'
10
:
9.6k
'
20
:
6.3k
'
25
:
5.4k
'
30
:
4.3k
'
40
:
3.0k
'
Thermistor R
0
=6.0k
'
±5%
Fixed number of B=3390K ±2%
Rt=6exp { 3390( ) }
0
:
6.0k
'
10
:
3.9k
'
20
:
2.6k
'
25
:
2.2k
'
30
:
1.8k
'
40
:
1.3k
'
60
:
0.6k
'
Thermistor for
lower temperature
1
273+t
1
273
Thermistor for
drain sensor
OC314--1.qxp 04.8.27 11:44 Page 19
