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 line voltage. They were about $100 the last time I saw one at Costco.
YMMV > > 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, mind you, just to click / beep > quietly in a rhythmic pattern. I cannot find reference to what this might > mean, > though I think it means that the circuit being used is "browning out" power > and > the UPS is making up the missing power. > > Last night this happened at about 11 pm!!! > > Eventually, the UPS's (we have many, but only two are involved in this > situation) begin to blare. Then everything shuts down and they continue to > blare > until reset and recharged. > > This is a very frustrating situation as it only affects two of our 4 UPS > units (all in the same room, but possibly on separate circuits). It is also > happening to a neighbor!!!!! Same scenario. Only our UPS's are far enough > away that > they don't wake us. Hers, sadly, wakes her when it begins to scream. (Please > don't ask about the 2 am - 4 am thing. I sometimes work late into the > night/morning.) > > We can tell when this scenario has occurred because a telephone answering > machine ceases to work, and because my iMac is turned off. There are two UPS > units involved. One has only the telephone answering machine plugged into its > battery back-up sockets, and the other has only my iMac connected to its > battery > back-up sockets. Dedicated UPS's if you will. It is unclear if these are on > the > same circuit breaker or not. It's also weird that sometimes one of the UPS's > is affected, and sometimes both of them are affected at the same time. > > I have searched for references to sounds made by APC UPS units without > success. These units are all relatively new (a higher capacity one was > purchased > last week for my computer in the hope that would help resolve the problem > with my > computer shutting down, but to no avail), and their batteries should be in > good condition. > > Any help / advice / would be appreciated. > -- "I may not have gone where I intended to go, but I think I have ended up where I needed to be." - Douglas Adams ************************************************************************ * ==> QUICK LIST-COMMAND REFERENCE - Put the following commands in <== * ==> the body of an email & send 'em to: [EMAIL PROTECTED] <== * Join the list: SUBSCRIBE COMPUTERGUYS-L Your Name * Too much mail? Try Daily Digests command: SET COMPUTERGUYS-L DIGEST * Tired of the List? Unsubscribe command: SIGNOFF COMPUTERGUYS-L * New address? From OLD address send: CHANGE COMPUTERGUYS-L YourNewAddress * Need more help? Send mail to: [EMAIL PROTECTED] ************************************************************************ * List archive at www.mail-archive.com/computerguys-l@listserv.aol.com/ * RSS at www.mail-archive.com/computerguys-l@listserv.aol.com/maillist.xml * Messages bearing the header "X-No-Archive: yes" will not be archived ************************************************************************
