An entrance qualification for universities of applied sciences (Fachhochschulreife) does not entitle the holder to study at Freie Universität Berlin.

The Fachhochschulreife, also known colloquially as “Fachabitur”, entitles you to study at a university of applied sciences in the state of Berlin, but not at a university.
Only after graduating from a university (of applied sciences) does one acquire the general higher education entrance qualification in the federal state of Berlin and can then begin studying at Freie Universität Berlin.

University graduates who apply for the first semester of an undergraduate degree program (e.g. Bachelor) at a university are considered second degree applicants (Zweitstudienbewerber*innen).

Since education is a matter for the federal states, it may be possible to study at a university in other federal states with the Fachhochschulreife.