37
Operation
(Reference)
System Settings
Menu Item
Description
This function allows the optimal room temperature to be maintained without the users
having to change the operation mode by automatically switching the air conditioner’s
operation mode (cooling or heating) according to the room temperature for locations
where there are vast temperature differences between day and night.
< Overview of Function >
This function automatically switches the air conditioner’s operation mode and set
temperature in units of one
(4) automatic cooling/heating switch group
according
to the following 3 parameters:
(1) main set temperature, (2) main room
temperature,
and the difference between the set temperatures when in cooling and in
heating operation (listed hereafter as
(3) temperature difference
).
[1] Control Method (How to determine the (1) Main Set Temperature and (2) Main Room Temperature)
The 3 following methods exist for determining the above temperatures.
1.Fixed Air Conditioner Method
The first indoor unit (the one highest on the screen) among those registered in the
automatic cooling / heating switch group is designated the main indoor unit and the
set temperature and room temperature of that indoor unit are designated the main set
temperature and main room temperature.
Note that if the main indoor unit is in fan operation mode, its automatic cooling /
heating switch group cannot be controlled.
2.Operating Air Conditioner Selection Method
Starting with the first indoor unit (the one highest on the screen) of those registered in
the automatic cooling / heating switch group and working down, a search is performed
to find an indoor unit that is both operating and in either cooling, heating, or automatic
operation mode. The first one that satisfies both of these conditions is designated the
main indoor unit and the set temperature and room temperature of that indoor unit are
designated the main set temperature and main room temperature.
If none is found that satisfies these conditions, the main set temperature and main
room temperature are determined using the Fixed Air Conditioner Method shown
above.
3.Average Method
All the indoor units that are registered in the automatic cooling / heating switch group,
are operating, and are either in cooling, heating, or automatic mode are found, and
the averages for their set temperatures and room temperatures are calculated and
used as the main set temperature and main room temperature. (Decimals are
rounded up.) Note that if there no air conditioners among the registered air
conditioners for the averages to be calculated, the main set temperature and main
room temperature are determined using the Fixed Air Conditioner Method shown
above.
[2] (3) Temperature Difference
The temperature difference is the difference between the set temperatures when
automatically switching between cooling and heating when using this control.
The temperature difference is set to between 1
°
C and 7
°
C in 1
°
C units.
(When shipped from the factory, the setting is 2
°
C.)
[3] (4) Automatic Cooling / Heating Switch Group
¡
This control is performed using one automatic cooling / heating switch group as a
unit.
¡
Up to 128 indoor unit groups can be registered in one automatic cooling / heating switch group.
¡
It is not possible to register the same indoor unit to multiple automatic
cooling / heating switch groups.
¡
Up to 128 automatic cooling / heating switch groups can be registered in this unit.
¡
These controls can be enabled and disenabled for each individual automatic
cooling / heating switch group.
(These controls only work for groups set as enabled.)
¡
A mark indicating that the indoor unit is under automatic control will appear on the
monitor screen.
Automatic
Changeover
81
See page
