52
Operation
(Reference)
System Settings
Menu Item
Description
FC Change
Over
[4] Notes
Read the following instructions to properly use the FC Change Over function.
(1) Control group setting and cooling-heating
Changeover
To ensure that the changeover functionality of the control can switch the operating mode
of the system, be sure to register indoor units that are not changeover masters in a
control group along with the one that is the changeover master in the system.
Example of incorrect Changeover configuration. Specifically, when as shown in the above
diagram an indoor unit which is not a changeover master (Address 1-02) was registered in
Control Group 2 although it should have been registered in Control Group 1, the following
unexpected action will occur:
[Example: when the operation mode of Group 1 changes]
As the room temperature in Group 1 increases, the operation mode of Group 1 switches over to
Cool. At this time, the operation mode of the 1-02 indoor unit was turned to the same mode as
that of the 1-00 unit. Consequently, only the 1-02 indoor unit in Group 2 was switched to a
different mode from other indoor units in Group 2.
[Example: when the operation mode of Group 2 changes]
When the room temperature of Group 2 increases, the operation mode of Group 2 is turned to
Cool. At this time, as the 1-02 indoor unit is consistent with the operation mode of the 1-00
indoor unit, only the 1-02 indoor unit in Group 2 stays in the original operation mode and is
in a different mode from the others in Group 2.
See page
Outdoor
unit
Outdoor
unit
Changeover
master
Not master
Not master
Control group 1
Control group 2
1-00
1-01
1-02
1-03
1-04
1-05
Operation mode: Heat; preset
temperature: 20
°
C
Operation mode: Heat; preset
temperature: 23
°
C
Changeover
master
Not master
Not master
84
88
to
Oper
ation
