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Usage - Main Menu Settings
System Management (cont'd)
Operation mode
Displays the current
operation mode.
Cooling:
Heating:
Block No.
Displays the block number. All
units in each group are operated
in the same operation mode. The
AT-50A automatically creates
Group list
blocks based on the refrigerant
pipe connection information and
Displays the number assigned to the indoor unit groups that are connected to
the group setting information on
the outdoor units in a specific block. Select a representative group from this list
each unit.
when the [Representative Group] is selected for the System-Changeover mode.
1. Touch the 2 System-Changeover button on the [System management] screen.
2. Touch the 1 Change mode button to select between [None], [Auto], and [Representative Group].
System-Changeover
Setting
mode
None (default)
Select this option so as not to use the System-Changeover function.
The operation modes (cooling/heating) will be changed-over based on the following:
Temperature differences between the preset temperature and the room temperature of
all indoor unit groups that are connected to a specific outdoor unit, AND the capacity of
Auto
each indoor unit in each group.
* The operation mode of the groups of units that are not operating, or the ones that are operating in
the Fan or Auto mode, will remain the same.
The operation modes (Cooling/Heating) will be changed-over based on the temperature
difference between the preset temperature of the representative group and the room
Representative
temperature.
Group
* When the air conditioning units in the Representative Group are not operating, or they are operating
in the Fan or Auto mode, the System-Changeover function will work in the same way as when the
System-Changeover mode is set to Auto.
When [Representative Group] is selected, the group that is
currently designated as the Representative Group will be
displayed.
* To designate a different group as the Representative Group, select
a new group on the screen that appears (shown right) when the 2
Representative Group button is pressed, and then touch the OK
button.
・The initial setting for the Representative Group is the group in a specific block with the smallest
group number.
3. Touch the 3 Save button on the [System-Changeover] screen.
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Maintenance
Touch Panel Cleaning screen
Display Block Information button
Displays the addresses of
the outdoor units and the
names of the groups in a
1
specific block.
2
3
To clean the touch panel
This screen allows the user to wipe the touch screen without accidentally changing the settings.
1. Touch the
2. When done cleaning the touch panel, touch the four numbers in the corners 1, 2, 3, and 4 in that order
icon on the [Main menu] screen to bring up the screen shown above.
to return to the [Main Menu] screen.
・The four numbers must be touched in the correct order. If you touch the numbers in the wrong order,
start over from 1.
・Wipe with a soft dry cloth, a cloth soaked in water with mild detergent, or a cloth dampened with
ethanol. Do not use acidic, alkaline, or organic solvents.
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