How do I reset Diamond 400 alarm after a powercut?

You may need to Reset The alarm.To Reset the alarm after an activation, press 0. it will reset

Tom
May 2019

www.ukpanels have the manual. Gardtec dont!!!
It was the first panels gardiner technology made

Roy
March 2008

power down the panel and remove the battery .power the panel back up using mains only not the battery.type in your code if it does not work try1234 or5678 .fit a new battery .hope this helps if not try phoning guardner technology now part of the risco group

brad
January 2008

The panel was an early gardtec
Try Alarmhelp.net
They will email you a copy

Dai
August 2007