Mitsubishi Electric BAC-HD150 Installation Manual page 8

Note
The system cannot be configured in the following way.
Groups that are not under the control of a main SC cannot be controlled from a sub SC.
Each group cannot be under the control of two or more main SC.
Sub SC cannot be under the control of two or more main SC.
Main SC
Group Group
Main SC 1
Group Group
Main SC 1
Group Group
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Sub SC
Group
Main SC 2
Group
Sub SC Main SC 2
Group Group