6 Optional functions
Indoor units input and output signals
SMGB0099 rev.0 - 12/2016
207
6
Cooling or heating mode setting
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
.
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 2 and 3)
Time
ON
Unit
operation
Control using
the RCS
(heating)
OFF
HEAT
COOL
Control by use of a remote temperature sensor
On-screen display:
08
.
The following functions are available when an optional remote temperature sensor is used:
• The unit is controlled by the average temperature of the air inlet thermistor and the remote temperature sensor.
• When the discharge air temperature exceeds 60 °C, the fan speed increases from medium to high or from low to
medium.
Remote
control switch
Air inlet temperature
Remote control switch
?
N O T E
•
The remote control thermistor cannot be used if a remote temperature sensor is used.
•
The heating temperature calibration function is automatically cancelled in heating operation.
•
If a remote temperature sensor is used, it must be positioned according to the following requirements:
- It must be in a position where the average room temperature can be detected and where the outdoor air generated when doors
are opened and closed does not affect the room temperature.
- It must be in a position where the thermistor is not directly exposed to sunlight or where there are no heat sources nearby.
