Default user codd is 1234 engineer code is 07890. You need to replace the battery in the panel. Tr = Tamper return and T6 means you hve a tmper on cct / zone 6. Look at your zone list to see whats what
Tr can relate to your external bell box - is the alarm monitored? is there a reset pad? If not you gonna need to default the panel. Then re- programme it. - If you are not an engineer may be more cost effective to replace the system - Install a Premier 48 with Prox key pads. Brilliant system.
Let me know how you get on !
Mark
May 2011