Re: 41A Power Supply Fans Whine

[DrFranken <midrange@xxxxxxxxxxxx>]

OK, first whiny fans are soon to be silent fans. So this is a self 
solving problem. :-)  Actually call IBM and get them to replace it. 
(They will replace the power supply) Generally the whine is a bearing 
warning you of impending failure. The fan is 'wobbling' as the bearing 
is no longer holding it straight.

Stopping and cleaning likely just got the fan to spin up without the 
wobble but after a time it did so again.

As you discovered the replacement is simple and requires no down time.

Many years on farm equipment trains the ear for sounds that are 'not 
normal.'  When such 'not normal' sounds end it is usually expensive, 
sometimes dangerous, and always a serious dent to productivity.

        - Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 2/17/2018 10:52 AM, Bradley Stone wrote:
> It seems my 41A power 8 system has developed a very high pitched
> whistle/whine in one of the power supply fans.
>
> A few weeks ago I took them both out (very nicely designed for easy
> removal!) and cleaned them out with a little compressed air.  Seemed to fix
> it.
>
> But, now after a couple weeks it's back.
>
> Is this common?  Is there anything I can do to lubricate them and stop the
> whining?
>
> And when I removed the fans before I shut down the entire machine and
> pulled them both out.  But, it looks like I can pull one out at a time
> while the system is running... Is that the case?
>
> Thanks!
>
> Bradley V. Stone
> www.bvstools.com
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