While you wait for answers, we may have found some information which could help you.
Success
Message
Door chime?
Stuck button on gardtec 500?
change battery on gardtec800?
Gardtec cpx lost chime yet again?
Gardtec 800 system error code -t after power cut?
Could anyone help me with gardtec 360/580 anti-code reset?
Gardtec 300/500 series- key pad shows 1u. ?
where can i buy a replacement battery?
how can I disable a Gardtec series 300 alarm?
How do I reset my gardtec300 alarm ?
How do I take Gardtec 580 keypad off wall?
Gardtec 800 with a battery/fuse failure?