John Morris wrote, On 9/21/2013 6:19 PM:
Hi Kris,
On 09/21/2013 05:11 PM, Kris Jordan wrote:
John Morris wrote, On 9/21/2013 11:28 AM:
The most distressing problem is the UPS stays OB after removing and
reapplying utility power. When power is removed, the UPS goes OB and
upsmon detects the power failure no problem, reporting
's0-ups0@localhost is on battery'. But when power is restored, there is
no clicking of contactors, no switch back to OL, and no detection by
upsmon that power is restored. The UPS can be manually put back OL with
'upscmd load.on'. I would expect the UPS go back OL automatically,
though; am I wrong about this? (APC forums folk are thus-far silent on
this question.)
Pull the batteries and unplug the UPS and press the buttons to fully
discharge the UPS. Disconnect the serial/computer interface connection.
Re-connect the batteries, plug into utility. Do not re-connect the
computer interface. Now that we have rebooted the UPS, see that it works
like it should.
I've done this a few times already after reading a 'braindeading'
procedure. With cable installed or not, removing utility power switches
to battery; restoring power remains on battery.
Is that how it should work, or not?
Definitely not.
Since we got the UPS, it has only been under testing without any load
(I just plugged a 200W lamp in for fun). These issues have been
persistent since the first time the new batteries were installed and
the unit was powered up two days ago. My question remains: The on-line
LED should not flash incessantly, and removing and restoring mains
power should cause the UPS to switch to OB and then back to OL without
intervention, correct?
Yes.
I've not seen this behavior myself even with bad batteries and a wrong
battery constant. Might want to check the batteries with multimeter to
be sure. Disconnect and allow them to sit for a day, then check the
voltage of each one. They should all be fairly balanced, and I would
expect something just above 13V.
The UPS itself is going to be pretty aged by now if it has been in use
most of that time.
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