Download a manual and go through the reset process.
You will cause noise and be working with live electricity nearby so take care.
Or call out an engineer and have it fully serviced and checked that it is sufficient for your new acquisition.
Will it be suffice for your insurances?
Is there enough detection?
Does it now require a Police response ?
Always get three quotes, we doing these quotes just in case you are wondering and they are always free.
Hope this helps.
Alarm, March 2014