Question about APC BE500U ES 500 USB BACK-UPS 500VA/300W 120V (NEWITEM13161417) UPS System

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Apc back-ups es 500 has a amber light and is constantly

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 28 Answers

SOURCE: green light flashes with a constant buzzing sound

It sounds like you need a new battery. If the APC is more than 3 years old, that is likely the problem. You can get a new battery from http://www.batteryinternational.com/apc-backups-es-be500u-ups-battery-ups-batteries-f2.html

Posted on Jun 23, 2009

Geekman
  • 32281 Answers

SOURCE: hi in my apc es 500 the amber and green light is

Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. There maybe one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault.

These lower powered and cheaper type UPS are switch over types, when the mains supply fail, the UPS switches over to the battery and inverter in milli-seconds which then supplies mains power. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.

Posted on Nov 12, 2009

  • 19 Answers

SOURCE: APC Back-UPS ES 500: green light flashes&continuous warning tone

On this unit, the likely culprit is the battery and that it needs to be replaced.

With that, you may want to think about the pros and cons of replacement versus buying an entirely new unit.

This unit is a relatively low end ups and the surge supression uses MOVs that wear out with repeated absorption of energetic spikes. That's why the better (and higher cost) UPSs and surge suppressors don't use them. They're not really that good anyway due to their relatively high transient impedance. The better equipment uses a "transorb" -- basically a back-to-back high voltage zener diode optimized for low breakover impedance and high instantaneous power capability. Unless the transient exceeds the design parameters of the circuit, these do not wear out and do not degrade. That being said, I will assume that you would likely replace this unit with a similar one.
The flashing may not be the battery at all and may be the charging circuitry, thus your new battery may not live very long (half the life that you would expect.

Many batteries out there are refurbs and have issues as all used parts do.

If you contact APC, they will likely give you a 35% discount on purchasing a new product.

The difference in price in the battery replacement vs. ups replacement at this level may only be a few dollars more.

I promise that I am not a UPS salesman, I just deal with many on a daily basis; therefore I am giving my two cents to try to thelp you avoid problems a year from now.

Posted on Dec 30, 2009

Testimonial: "Outstanding answer with right amount of detail. I swapped battery with identical APC UPS that I have and vfd that battery was cause of warning tone."

  • 401 Answers

SOURCE: red light and beeping

change the battery

Posted on Mar 11, 2010

  • 34 Answers

SOURCE: APC 500 ES when i turn

the apc ups performs a self test when ever it is powered on.... it should complete the process in 10 to 20 second but if it does not, then there is something wrong with ups.. try to get it checked...

Posted on Mar 10, 2011

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Quite likely that the battery has died in it .they do not like being put to bed for extended periods of time .

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sounds like the battery is low or has been disconnected.

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APC UPS ES 500 series continuous beep sound and flashing green light


Hi Lasantha,

Check the battery in your UPS - it's most likely going bad and you will need to replace it.

If you need UPS, Surge, or Power Related help contact Daniel @ Power & Systems Innovations 800.260.2259 or go to our website: http://psihq.com/
** If this helped - Give it a Thumbs Up :) **

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My apc up es 500 is not turning on please help.. i havent used it for 1 year


You may have a battery problem.
Re-chargeable batteries require continual use and do not work after a long period on non use.

Apr 09, 2011 | APC BE500U ES 500 USB BACK-UPS 500VA/300W...

1 Answer

APC 500 ES when i turn it on it creates a constant noise with green light flashing. sometimes it stops in 10sec. but most of the time it wont.


the apc ups performs a self test when ever it is powered on.... it should complete the process in 10 to 20 second but if it does not, then there is something wrong with ups.. try to get it checked...

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My Apc Back UPS Es 500 did not charge and then there is power when I turn on the switch. How could I repair this problem?


Good Day! Try changing the battery. please visit apc's service center for battery replacement. it will only take 3-5 working days. once done, your ups will be as good as new.

Nov 09, 2010 | APC BE500U ES 500 USB BACK-UPS 500VA/300W...

1 Answer

Alternating green and orange light with constant beeps


Verify that the usb to ups cable is pluggled in properly. Also you may not have a good ground. Disconnect the ups and plug it in another outlet to test with nothing else plugged into it, to see if it still beeps. You can also try and upgrade the ups software from apc.com

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