We may have found other answers which could help you.
Click here for Alarm Set Kitchen
Gardtec 800 with a battery/fuse failure?
Gardtec 800 system error code -t after power cut?
Door chime?
Gardtec 300/500 series- key pad shows 1u. ?
How do I take Gardtec 580 keypad off wall?
how can I disable a Gardtec series 300 alarm?