Two of our customer reported their UC applications stopped responding which are running on a UCS 240 . From the server console i observed below mentioned purple screen.

As the message instructed we contacted Cisco TAC and they said this is due to the Power Policy of UCS 240.

By default UCS 240 ships with Configured Fan Policy Maximum Power. This will force the Fans to run with full RPM.

To reduce the Fan sound if you change this to balanced you will end up with above purple Screen.The Configured Fan Policy Must be Maximum Power.