5 Optional functions
Indoor units input and output signals
SMGB0137 rev.0 - 05/2021
102
Remote cooling / heating change
On-screen display: 07.
This optional signal can be used to change the heating or cooling operating mode by sending a contact signal from
outside the unit. The operating mode is controlled by the field-supplied switch or by the remote control, whichever is used
last.
Connect the wiring and use the materials as indicated in
.
CN3
X1
3
2
1
2
1
X1
3P Connector
Indoor unit PCB
HEAT
COOL
Power
supply
A time chart with the uses of the functions is shown below.
?
N O T E
• The collection of signals during the first 10 seconds after connecting the power supply is not available due to component initialization.
• This function is not available after the manual (forced) stoppage because commands from remote control switch are cancelled.
(Remote control switch is required).
Control using the
RCS (cool)
CN3 signal
(Terminal 1 and 2)
Time
ON
Unit operation
Control using the
RCS (heating)
OFF
HEAT
COOL
?
N O T E
• Wired controller or receiver kit is required for this function.
• Refer to the table 4.1 for details of the required components.
• If multiple indoor units are connected to the same transition wiring of the controller, input the signal to any of these indoor units.
• When the transition wiring is not used in the twin, triple and quad combinations for simultaneous operation, set this function only to
the main indoor unit.
Setback operation
On-screen display: 09.
The function is to identify occupied/unoccupied by means of card key in/out. It keeps the unoccupied room (the card key
is out) being as comfortable as when it is occupied (the card key is in).
To enable the function, the function selection and input on the wired controller are required.
