Fujitsu AUYG07LVLA Design & Technical Manual page 298

Example 3 (prohibited)
Central remote
controller line
Central remote
controller
Do not connect Central remote controller to outdoor unit or indoor unit.
Always connect branch box to Central remote controller.
Example 4 (prohibited)
Branch box 1 (primary)
Central remote
controller line
Branch box (primary)
Do not connect one Central remote controller to two refrigerant systems.
Branch box (primary)
Central remote
controller line
Branch box 2 (secondary)
Central remote
controller
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