In <[log in to unmask]> [log in to unmask] writes:

> I have a new 918 with the UPS.  Starting Sunday night there are console
> messages (UPSERR 0033 and UPSWARN 0036) about AC power being lost and
> restored.
>
> Is the UPS sensitive to over/under voltage conditions?  If so, how
> sensitive is it?  IOW, do I have a power quality problem that is
> going to keep this machine from running?
>
> Jim Phillips                            Manager of Information Systems

We have a 918LX and have had no problems with our UPS.  However, FWIW, I
can relate a problem we had with the BEST FERRUPS which powers our DEC
systems.  We had just connected a diesel generator to provide power to the
computer center during some major electrical work on campus.  Immediately,
the FERRUPS began turning on and off.  Turns out that the cycle tolerance
had to be increased to handle the greater fluctuation in frequency put
out by the generator.

Hence, I would suspect a similar cause in your case, caused by either
voltage or cycle variance.  The power supply in the 48 probably handles
these fluctuations itself, ah, but the 918 has a UPS to that.

HTH.

Bruce.

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   Bruce J. Senn                             Phone:  (518) 388-6664
   Senior System Manager                     FAX:    (518) 388-6458
   Union College                   Internet:  [log in to unmask]
   Schenectady, NY 12308
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