External Input - Fujitsu ARXG54KHTA Design & Technical Manual

8-2. External input

• "Operation/Stop" mode or "Forced stop" mode can be selected with function setting of indoor unit.
• A twisted pair cable (22AWG) should be used. Maximum length of cable is 150 m.
• The wire connection should be separate from the power cable line.
¢ Control input (Operation/Stop or Forced stop)
The air conditioner can be remotely operated by means of the following on-site work.
Operation is started at the following contents by adding the contact input of a commercial ON/OFF
switch to a connector on the external control PCB and turning it ON.
Unit operation
Operation mode
Set temperature
Airflow mode
 Circuit diagram example
Indoor
control PCB
Connector
1
2
3
Surely insulate with
insulation tape etc. since
this wire is not used.
• When function setting is "Operation/Stop" mode
Input signal
Indoor unit
• When function setting is "Forced stop" mode
Input signal
Command
Indoor unit
Remote controller
8-2. External input
Initial setting after power is on
Auto changeover
24 °C
AUTO
• Contact capacity: DC 5 V or more, 15 mA or more.
Connected unit
• Make the distance from the PCB to the connected
Example: Switch
unit within 10 m.
• Use non-polar relays and switches.
10 m*
Signal
Locally purchased
On
Off
Operation
Stop
On
Off
Forced stop
Normal
Operation
Stop
- 19 -
Starting mode other than initial setting
Mode at previous operation
Temperature at previous operation
Mode at previous operation
On On
Remote control
operation invalidity
On
8. External input and output