My Scantonic 9247/9889 simply stopped arming when code was entered?

Your system is notorious for defaulting to factory default following battery/fuse failure. Remove mains and battery power, ignoring any sounders making a noise, reapply power, battery first, then mains, enter code, default 1234. That should silence any sounders. Panel will then need to be reprogrammed using engineer mode.

Alan mckenzie
March 2020

I would suggest that you first try and trace the fault that caused the fuse to blow. Once this is identified a repair may need to be done before your system will function correctly.

Rupert
March 2020