I have a WS-4506-e that has two 6000w power supplies that both went into Output Fail mode at the same time. The four input power sources are on 4 separate circuits and my power guys have assured me that we did not experience any spikes. The power setting on the switch is set to the default redundant and the load on the switch is far from maxed out.
Here is what is strange. After the failures, when I turn off one of the power input toggle switches on a power supply, doesn't matter which one, it will then begin to come back up. I can turn that input power back on and the power supply continues to work. Both power supplies will work for a period of time then both will fail again. I swapped out just one of the power supplies and reset just to see what would happen. When the original power supply failed this time around, the new one remained up so I guess that its safe to say that my power supplies are fried.
My question; Has anyone seen this behavior before and does anyone have any idea what might have caused this? Thanks.