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From: ian field on 14 Mar 2010 17:19
The damn thing has developed the habit of bleeping at random intervals, I
tried running it flat and then reconnecting the mains supply but it still
keeps bleeping.

The user manual doesn't have a trouble shooting table and apart from the
random bleeping, the UPS appears to be working correctly.

Any suggestions?

TIA.


From: D Yuniskis on 14 Mar 2010 18:09
ian field wrote:
> The damn thing has developed the habit of bleeping at random intervals, I
> tried running it flat and then reconnecting the mains supply but it still
> keeps bleeping.
>
> The user manual doesn't have a trouble shooting table and apart from the
> random bleeping, the UPS appears to be working correctly.
>
> Any suggestions?

Put a switch in series with the noisemaker. I ran a UPS
with this symptom for years with the alarm disconnected.
AFAICT, the UPS always "did the right thing" (in terms
of power) so the noisemaker was just that -- a maker
of noise. :<
From: ian field on 14 Mar 2010 18:18

"D Yuniskis" <not.going.to.be(a)seen.com> wrote in message
news:hnjm2s$inl$1(a)speranza.aioe.org...
> ian field wrote:
>> The damn thing has developed the habit of bleeping at random intervals, I
>> tried running it flat and then reconnecting the mains supply but it still
>> keeps bleeping.
>>
>> The user manual doesn't have a trouble shooting table and apart from the
>> random bleeping, the UPS appears to be working correctly.
>>
>> Any suggestions?
>
> Put a switch in series with the noisemaker. I ran a UPS
> with this symptom for years with the alarm disconnected.
> AFAICT, the UPS always "did the right thing" (in terms
> of power) so the noisemaker was just that -- a maker
> of noise. :<

My best guess would be the battery's internal resistance has started to
increase.

If it does give up, I have a 12V12Ah battery left over from a bigger UPS I
scrapped that used 2 batteries - one was dud and a new UPS from Maplin was
cheaper than replacing the battery.

It won't fit, so it looks like fly-leads through holes drilled in the case -
I can pull the wires off the sounder while I'm at it.


From: ian field on 15 Mar 2010 15:46

<Meat Plow> wrote in message news:3ji3ar.i4g.17.11(a)news.alt.net...
> On Sun, 14 Mar 2010 21:19:00 -0000, "ian field"
> <gangprobing.alien(a)ntlworld.com>wrote:
>
>>The damn thing has developed the habit of bleeping at random intervals, I
>>tried running it flat and then reconnecting the mains supply but it still
>>keeps bleeping.
>>
>>The user manual doesn't have a trouble shooting table and apart from the
>>random bleeping, the UPS appears to be working correctly.
>>
>>Any suggestions?
>>
>>TIA.
>>
>
> Check the voltage input. Perhaps it drops lower than the switchover
> threshold.

I have 2 identical UPS boxes on the same ring main - only 1 is playing up.


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