Hi man,
judging by proteus Enclosure, you might be in the U.K.?
The system is panalised and more than likely the keypads are on a bus rather than being zigbee.
Best thing to do would be to log into the ea3 and see what’s going on. More than happy to assist with this.
PM me or send me a WhatsApp on +447803464444
Thanks
Muj