,,WwA 24yr old alarm isn't worth bothering with,
If the cables are okay, new controls, new bell ect...
The engineering can't be changed, if it's the same concept I'm thinking of with a rkp, there's lots of core sent to the rkp either a 20 or 2 8's
Wera or whia for insulted tools.
However apart from CK screwdrivers being soft, there all about the same as a £1 odd draper expert no. 2 pozi from Toolstation.
I would take the view if you have the means to buy a property which is big enough to have power supplies & zone expanders, you should have budgeted for an alarm man.
Reaching for my big book of stereotypes... your from the Clan McSkinflint
As a guess I would assume the Keypad in not communicating with the controls,
Personally I would start by removing a keypad off the wall, connecting it direct to the controls via short bit of wire with nothing else power up or connected to the panels data network & see if you can get control of the panel, then add device one at a time until everything is back on
Just remember the alarm may well have been faulty before the property was void.... good luck
there's is diagram with the texecom sounder on how to connect mutlipal units
or you can just series them up,
or use the 0v return to operate a relay & connect to a zone
I think he bought / got given an empty box...
looks to be 3 screw holes in the back plate, 2 fixing screws for the lid
3 fixings screws for an electronic horn?
4 fixings for bell module
2 sets of 2 fixings for micro switches
I've never touched an able sounder...
so I'd assume an aritech, ade, ect module... but could be anything