When addressing indoor units on your VRF project, the highest indoor address or "IU AD" can only be 64. If you select a higher address than 64, the system controllers or service tool will not recognize the units. They will run with no error, but no external control. 

This is all because, per network segment, 1640 ft and or 64 devices, we need to a signal amplifier (UTY-VSGXZ1) and start a new section.