Who did the installation? If it was a DIY job, then by all means try to find a solution to the fault codes. However, if the installation was done by a company and no-one tampered with the bike since the installation, then take the bike back to that company, to address the fault codes complaint.
Personally, I suspect that there may be a connector not reconnected or maybe the alarm wiring tapped into the wrong feeds. The shop there the work was done, would be able to advise.