Technical Manual

16
Controller operation : Basic operations
Operation mode, temperature, and fan speed settings
Button operation
[
Operation mode
]
<What the blinking mode icon means>
The mode icon will blink when other indoor units in the same refrigerant system (connected to the same outdoor unit) are
already operated in a different mode. In this case, the rest of the unit in the same group can only be operated in the same
mode.
<AUTO (dual set point) mode>
When the operation mode is set to the Auto (dual set point) mode, two preset temperatures (one each for cooling and
heating) can be set. Depending on the room temperature, indoor unit will automatically operate in either the Cool or
Heat mode and keep the room temperature within the preset range.
Operation pattern during Auto (dual set point) mode
The room temperature
changes corresponding
to the change in the
outside temperature.
HEAT COOL HEAT COOL
Preset temp.
(COOL)
Preset temp.
(HEAT)
Room temperature
The graph below shows the operation pattern of indoor unit operated in the Auto (dual set point) mode.
ON
F1 F2 F3 F4
Cool
Room
AutoSet temp.
Mode Temp. Fan
Fri
Cool Dry Fan
Auto Heat
Main
Sub
Press the F1 button to go through the operation modes in the order of
"Cool, Dry, Fan, Auto, and Heat." Select the desired operation mode.
• Operation modes that are not available to the connected indoor unit models will
not appear on the display.
<Automatic operation>
• According to a set temperature, cooling operation starts if the room tempera-
ture is too hot and heating operation starts if the room temperature is too
cold.
• During automatic operation, if the room temperature changes and remains
2˚C or more above the set temperature for 15 minutes, the air conditioner
switches to cooling mode. In the same way, if the room temperature remains
2˚C or more below the set temperature for 15 minutes, the air conditioner
switches to heating mode.