The more sophisticated units often have self-test circuitry even if
the unit is setup to be monitored by a connected computer; this may
relate to the 2-4 AM thing. The other issue might be a failing
battery. They do wear out. I have 2 TrippLite 1000VA units that have a
real time read-out for the
I know UPS issues have been covered in the past. As many of you may know, I'm
an advocate of using them. Recently (within the past 2 weeks!) we have begun
having UPS issues:
To wit: Sometimes, in the middle of the night (2 am - 4 am), two of our UPS's
begin to click / beep. Not sound an alarm,
A UPS will also get unstable and noisy if the voltage goes up. appliances and
electronics will be unhappy also. get a line meter from radio shack(i am not a
part of radio shack).
If the meter is bouncing up, and up a lot, call the power company, and tell
they you have lost your neutral.
