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Apc fail on line beep click

Line voltage normal, but alternate back and fourth line and battery

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If Line voltage normal and your is a smart UPS, you may need to change the "nominal voltage" and high and low limits settings correctly using Powerchute +.

Posted on Aug 20, 2014

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Posted on Jan 02, 2017

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SOURCE: Replace battey light blinking, beeping

sounds like battery Mite still be bad ? check and see again lala linda

Posted on Jun 13, 2008

  • 25 Answers

SOURCE: APC BR800 Overload light with beeps

Your main control board is defective, you need a new unit.

Posted on Jul 11, 2009

  • 26 Answers

SOURCE: my apc keeps clicking and the on line and on

Often, it is an expired battery that will cause an issue like this. Since a bad battery renders the APC ups useless, it will usually display blinking lights to let you know that something is wrong. The software, if installed, will also help troubleshoot the problem. You find which battery you need from this site: http://batteryinternational.com/ups-batteries-apc-batteries.html

Posted on Oct 12, 2009

  • 541 Answers

SOURCE: Battery Charging Failed on APC Matrix 5KVA

you will need to replace the unit. the charging circut has failed

Posted on Dec 27, 2009

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

in the end solution is you have to bring it nearest apc service.
if you loaded more than its max. capacity at past, the sensor of power is geting burn the sequare wave generator IC.
so you need help with that, olso complicated.
I live the same position with my rs1000, horrible :((

Posted on Jan 09, 2010

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APC BACK-UPS ES 500VA fails to provide back up during power failure


Get APC Powerchute Personal Edition for free and run it. If it says your battery isnt charged, check its voltage disconnected. Charge it with a car battery charger and see if its still a good battery. If not , replace it. If the battery is good, then check the charging voltage. Should be about 14 volts. if not, check the small transformer on the main board. Should be 120 in and 17 to 18 out. 4 diodes in a bridge for charge. The input to the transf has small fuse into it alone.

Jan 04, 2013 | APC BE500U ES 500 USB BACK-UPS 500VA/300W...

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4 beeping sound every 20 seconds, even when there is no gadget attached to it.


This alarm indicates that the UPS has transferred from On Line operation to On Battery operation. The Battery Power Supplied outlets are now battery powered.

- If the input voltage is determined to be unsafe for your computer equipment, the UPS will transfer to On Battery. The alarm will stop once the unit returns to On Line operation. Please refer to the technical specification section of your user manual for the acceptable voltage window. Occasional transfers to On Battery should not be a matter of concern, but rather, should be considered normal operation. The UPS is trying to provide clean, safe, and reliable power. If your unit shipped with APC management software it may be possible to change the default acceptable voltages that the unit shipped with. Please see the help section of the APC management software for instruction to do this.

- If the Frequency deviates + or - 5 % this will also cause a Back-UPS product to transfer to battery power. Frequency distortions are most commonly caused by generators that are undersized. Always make sure a generator is 3 to 5 times the size of the total load attached to unsure it can maintain a steady output frequency. There is no way to change the +/- 5% deviation.

- If the shape of the incoming power is considered "too dirty", some Back-UPS products may transfer to battery power. This is most likely the problem if you have already confirmed that the input voltage is within the acceptable limits. Most Back-UPS products have the ability to change their sensitivity to the shape of the input power from high to medium or even low. Please see your user manual for details as to how to adjust this setting.

Jun 27, 2011 | APC Computers & Internet

1 Answer

I want to use the apc 650 pro to run on my 900 watt generator.I will be pulling about 400 watts,will this smooth out the voltage from my generator to my radio? Is there anything I must do to use the apc in...


the battery back-up will smooth out the voltage, You will definitely need a battery in or else it will beep nonstop and drive you batty! the APC should have surge protected outlets already built into it. And since you will be using it outside of a computer environment, im guessing on a worksite, there will be nothing extra you need to do besides plugging it in. I would suggest plugging it into a stable voltage for the first hour or so to allow it to charge the battery.

Jun 13, 2011 | APC Back-UPS Pro 650 UPS System

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

Jun 25, 2010 | APC Back-UPS ES 350 - UPS ( external ) -...

1 Answer

APC passes its self test but no backup


More than likely it is the battery. These units simply test the voltage during the self test, and, although not typical, the battery voltage could be good without a load, but fail with a load. 3 years is generally the life span of SLA batteries. Replacement batteries are fairly inexpensive and can be found at: http://batteryinternational.com/ups-batteries-apc-batteries.html

May 25, 2010 | APC Back-UPS CS 500VA UPS System

1 Answer

Infinit loo between online and on battery?


With all 5 units behaving the same, I would expect that the power is still out of range. If the power is too high or too low (see manual for thresholds) the unit will stay on battery power to protect the attached equipment. If you have the software loaded, it will show you what the input AC voltage is at. Otherwise, it could be time for new batteries: http://batteryinternational.com/apc-smartups-1000-ups-battery-ups-batteries-f2.html

May 09, 2010 | APC Smart-UPS 1000VA UPS System

1 Answer

After a power outage my apc has this clicking sound. every 4 seconds or so it sounds like it clicks and then a slightly different click 4 seconds later. However, when everything is powered up it doesn't...


I found this on the APC website;
Question: What would cause a Back-UPS Pro, a Back-UPS Pro USB, a Back-UPS RS, a Back-UPS CS, a Back-UPS LS, or A Back-UPS XS to beep once every 5 seconds with no output power?
Answer: One beep every 5 seconds is an indication that the UPS has entered what is called "Low Voltage Sleepmode".
The Back-UPS product has transferred to battery power due to a low voltage condition at the wall. The Back-UPS has remained Onbattery until its runtime was totally exhausted, however, there was still enough voltage present at the wall to trickle charge the battery.

This is considered to be a normal operating state. When the voltage returns to normal the Back-UPS will wake up and restore power to the battery outlets.

Nov 02, 2009 | APC Back-UPS ES 350 - UPS ( external ) -...

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