DaveIT

Hi two of my teachers have reported that their ActivPanel's keep unfreezing randomly, without any button presses on the remote or front panel while they are doing some important work. I've seen this happen myself on one of the panels. One of the panels is a AP4-75. Has anybody else experienced this and do you have a solution? I have been told that disabling PIRs Auto Wake Up? fixes this problem, Does anyone know where this option is? Thanks DaveIT