Welcome to Outlaw and to the 7500 which I also own. I have my amp on a Panamax conditioner but am not using any triggering. I just like to switch it on via it's own front power button. Perhaps the triggering on the panamax does not give enough voltage to properly turn the amps on and in time causes shorting or faulting on the amps' power switching. I use my conditioner as a conditioner only.

BTW I love your system. I too run Klipsch and a PB13 Ultra.