Veritas 8 control panel with built in keypad and display?,
Does that sound like yours?,
In all cases regarding the veritas though the battery is located inside the control panel or blank endstation for the R8s and compacts.
The flashing Unset led in most cases is a good indication that the battery has failed and needs replacing.you will have to rechime the zone again when the battery has been replaced because that bit of programming will be lost(easy to do).
So in short you need a new control backup battery.
Please be aware of the mains voltages within the control panel and mains must be isolated before you remove the lid from the panel,very important for your own safety if you are going to attempt this yourself.
Be safe and if you need more help then come back on here to us.
e manno
April 2013