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2-4. PRECAUTIONS WHEN SETTING THE SYSTEM
2-4-1.
Priority of remote controller setting
The most recent control transmission has priority. In other words, if two controllers (standard re-
mote controller, central remote controller) send different control command to one indoor unit, it is
the last transmission that will have priority and be used by the indoor unit.
(Example) If the indoor unit is operating at a setting of 25 °C using a command from central remote
controller 1 and receives a command to operate at a setting of 20 °C from central remote controller
2, the indoor unit will operate at the setting of 20 °C.
1
Central remote controller 1
Indoor unit
OFF
OFF
This applies when performing separate operations from different controllers.
Central remote controller ⇔ Standard wired remote controller or Central remote controller 1 ⇔
Central remote controller 2.
2-4-2.
Group information store
The following show the restrictions on group information store.
• A maximum of 64 groups can be formed in one system.
• A maximum of 64 remote control groups can be stored per group.
• Since the remote control group is the smallest control unit and can not be broken up, the
group must be made up with complete remote control groups.
The following show examples of group formation. There are some restrictions on operating
mode, on display for the following occasions.
• Group formed with the indoor units in two refrigerant systems.
When part of indoor units exist in cooling & heat pump type refrigerant system, certain operating
mode of the group can not be carried out even if the operating mode is shown on the LCD. In
addition, the operating mode is limited owing to cooling / heating priority setting.
• Overlapping groups.
The operating condition of the indoor units overlapped in the group is determined by the control
signal last sent to indoor units.
10
TEMP.
Setting of 25°C
25°C
Operating at 25°C
2
Central remote controller 2
20°C
Operating at 20°C
TEMP.
Setting of 20°C
Refrigerant system 1
Refrigerant system 2
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