How to Diagnose History Event User 255 Key-switch D4412 & D6412 Panel

Issue

When looking at the history log on a D6412 or D4412, the history log displays user 255 key-switch, and the key-switch zone has not been enabled.

Solution

When arming with command 1, or pressing the all on key, and not using a pass code, "user 255 key-switch arming" will appear in the history log as the user that armed the system.