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APC RS 900. Intermittently the yellow battery light will come on for only a second or so, long enough to get one beep, maybe. Been on the phone with APC tech and they had me lower the sensitivity to medium. Still having problems. Worse, they techs must be outside US as they are very difficult to understand. Still under warranty.

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6 Suggested Answers

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Posted on Jan 02, 2017

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jvpacoin
  • 91 Answers

SOURCE: Overload light in APC RS 800 UPS

it seems that the inverter circuit of your UPS is dying. the solution here is you have to open up the UPS and check the inverter circuit. to make easier, check the power mosfet if its leaking.

Posted on Aug 14, 2009

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  • 773 Answers

SOURCE: APC Back UPS RS-1000 Overload LED with beeping sound after on.

this indicates you have too many things plugged into it.

Posted on Nov 20, 2009

pravinbhavsa
  • 348 Answers

SOURCE: how to use apc rs 900 without battery

No no way to use the ups without battery it will not show mains supply without battery and you cannot use it as a stabilizer you must connect battery

Posted on Mar 10, 2010

  • 84 Answers

SOURCE: My APC RS 900 UPS is making a beeping noise and

Without knowing which light is flashing I can only guess. From my experience and assuming it is the battery light that is lit and NOT the overload light, it can be one of two things, one is your battery is near the end of its life and needs to be replaced, and the other is that your battery is improperly connected.

To confirm if your battery needs to be replaced or not, you can run a self test. Ensure that the battery has had time to fully charge (and that it is definitely correctly connected), and then turn off the UPS, and turn it back on. It will automatically run a self test.

if the light stays lit, you need to order new batteries. One source is here: http://www.refurbups.com/APC-Back-UPS-RS-900-BR900-Replacement-Batteries

If it IS the overload light that is lit, you simply have too much equipment attached to the UPS, more than the inverter can handle. Try removing some equipment until it turns off.

Posted on Mar 31, 2010

BarrettDenCo
  • 1772 Answers

SOURCE: I just replace the battery

Sorry to read about your problem, I hope this helps you out.

let it charge 24 hours, and see if it works

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

Posted on Dec 22, 2010

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Without knowing which light is flashing I can only guess. From my experience and assuming it is the battery light that is lit and NOT the overload light, it can be one of two things, one is your battery is near the end of its life and needs to be replaced, and the other is that your battery is improperly connected.

To confirm if your battery needs to be replaced or not, you can run a self test. Ensure that the battery has had time to fully charge (and that it is definitely correctly connected), and then turn off the UPS, and turn it back on. It will automatically run a self test.

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