It should be easy to verify whether the system is truly how, versus it thinking that it is dangerously hot. Just stick a few thermometers, prefereable min/max types aroudn the box no?
In the mean time, your description so far suggests to me that it really is too hot.
So you have an environmental problem.
It this system rack-mount?
Is is venting the same direction (front to back!?) as the other systems in the rack, notably those above an below it?
If it is venting in the opposite direction then it will just suck in hot air blown by the system next to it, heat up some more, exhaust, be sucked back into neight, which heats some more still... and so on untill the alarm goes off.
So check those airflows! (with a sheet of paper before the fans ?).
Temporarely use an external fan to break the loop with fresh air.
Potentialy install an air baffle to divert/break the air-short-circuit.
Are the ES40 fans (re)installed backwards (ok, I do not know whether that is even possible).
Hope this helps some,
Hein.
