Until the probation violation is heard by the judge, it is unlikely that she will be released. The quickest way to resolve these situations here in NJ (and presumably in PA), is for her lawyer (I read what you said about her not seeing the PD yet) to address the situation with the probation officer, the prosecution and the Court. A failure to report and an unauthorized change of address are both technical probation violations. If at all possible, on her behalf, consult with an experienced criminal defense lawyer admitted to practice law in PA, or try to contact the PD office to see when she will be assigned a PD, to discuss potential mitigating factors that can be presented on her behalf, and to see if this hearing can be expedited. Good luck.
Since I do not practice law in your State, this answer is provided solely for informational purposes only, for you to use as a starting point when speaking directly with a lawyer in your State. This answer does not constitute legal advice, create an attorney-client relationship, or constitute attorney advertising. I urge you to immediately contact an experienced criminal defense lawyer admitted to practice law in your State before you make any decisions about this case.
Get an attorney involved who should call the PO. Since your post dose not indicate that She was violated for the change in address she will want to confirm why she was violated. She should have an attorney move on this ASAP because she can sit in jail several weeks just waiting for the Gagnon ( Violation of Probation) hearing.