Intel Xserve Blower for Power Supply 1 Out drops to 0 RPM momentarily

10.5.6 Server. Machine is less than a year old. Yesterday I configured Server Monitor for the first time and have received two notifications of the blower for the Power Supply Out changing to zero RPM. It is momentary and goes back to normal.
Everything else is in the normal range -- temp, voltage.
Is this normal or indication of future failure?

Hi Forum folks.
I've had a 6-month (ish) Xserve doing the same thing. Every day, at least once a day, I'd get an email / SMS, saying the power supply or blower was having a momentary problem.
After shutting down the server, I pulled out the Power Supply Units, and checked them out.
Turns out, one of them had a slightly damaged heat sink (damage visible without opening the PSU). So, I swapped it for a spare I'd purchased. And then got the damaged unit (damaged internally at factory by the look of it) replaced by my Apple Reseller.
Note: the newer Intel XServes (early 2008) have a 750w PSU, compared to a 650w PSU, in the 2006 Intel XServes. The older PSUs fit in the newer Xserves, but they DO NOT function. (You'll get an error in Server monitor).
Hope that helps,
Cheers,
Derek

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