This is how to troubleshoot where turning the key to the Test position does not put the smoke detector inside the duct enclosure into alarm, which will likely be due to the coil is missing.
This is a generic solution for any photoelectric device application where the device seems to keep going in and out of trouble due to alignment issues.
Part numbers DS240, DS241, D296, D297
This article provides instructions for exporting and saving the program from an FPA-1000 to be imported into a replacement FPA-1000 panel.
This information may be needed when replacing an FPA-1000 fire panel with another with intentions to use the same panel program.