If you have any more details about the Orona Arca 3 or its application, I might be able to offer more tailored advice on where to look or what to do next.
If you have obtained the , here is a chapter-by-chapter breakdown of what to expect. Note that most manuals are split into "User" (for passengers/building managers) and "Technician" (for maintenance). Orona Arca 3 Manual Pdf