20 Most Recent APC Back-UPS Pro 650 UPS System Questions & Answers


Are you sure there is not a USB drive or thumb drive plugged into it? If there is nothing else that it is trying to boot from your operating system is gone or not operational. You would need to reload the OS. Hope this helps.

APC Back-UPS Pro... | Answered on Dec 07, 2016


try turning on the power connection

APC Back-UPS Pro... | Answered on Nov 15, 2013


They replace the batteries

APC Back-UPS Pro... | Answered on Oct 24, 2013


The smell is sulphuric acid boiling in the battery in the unit. It is getting more the the required 14 volts ( probably full line voltage) so I would junk it as it will cost more than it is worth to repair. Do not use it and any fluid that is coming out will be highly corrosive so be carefull

APC Back-UPS Pro... | Answered on Jun 04, 2013


yes connect the serial cable came with the ups from serial port to ups there is again one serial port to ups the insert the cd came with ups and install it then it will auto turn offf before battery bown

APC Back-UPS Pro... | Answered on Aug 09, 2012


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.

APC Back-UPS Pro... | Answered on Jun 13, 2011


These beep error codes may help you.
1. Four beeps every 30 seconds (On Battery LEDwill be illuminated)
This alarm indicates that the Battery Power Suppliedoutlets are now supplying battery power as opposed to power from the utility.If the UPS determines that the input utility power is unsafe for your computerequipment, the UPS will switch to battery power.
Note: Ifthe power disturbance is brief, you may only hear one or two beeps.

2. Continuous Beeping (On Battery LED will beilluminated)
This alarm indicates that a Low Battery condition hasbeen reached and that the UPS will soon shutdown. Once the UPS transfers to OnBattery operation, it can only stay on battery for a limited amount of time.The UPS will sound this alarm about two minutes before the batteries aretotally exhausted. Once exhausted, the UPS will shutdown and turn off itsoutput power to your equipment. If you hear this tone you should immediatelyshutdown your computer to prevent data loss or corruption.

3. Continuous Beeps for 30 seconds (Back UPSOFFICE 250 and 280 ONLY)
This alarm indicates the unit has detected an Overloadcondition after it has performed a self-test during start-up.

4. Continuous Two-Tone Beep
This alarm indicates a severe Overload was detectedwhile the unit was on-battery operation. This tone will continue to sound untilthe unit shuts down.

5. Continuous Tone (On Battery LED will beflashing)
This alarm indicates that the battery-powered outletsare overloaded.

6. Continuous Tone (On Line and On Battery LEDsflashing) Back UPS OFFICE 350, 400, and 500 ONLY
This alarm indicates that an internal UPS fault hasoccurred.

APC Back-UPS Pro... | Answered on Feb 28, 2011


The Back-UPS is fairly straight-forward. The 9-pin connector (at the top of the back) is a serial port (RS-232) for the UPS data (when connected to a computer it will shut down the computer safely during a power outage). The next plugs are RJ-11 telephone jacks; the cord from the jack (wall) goes in on the left (some models have RJ-45 for network protection). The battery protected outlets are the three surrounded by black paint. The other three provide surge-protection only. Do not plug items like printers and scanners into the outlets that provide battery protection.

I hope this helps.

Cindy Wells
(for software, manuals and other information:
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BP650S&tab=models )

APC Back-UPS Pro... | Answered on Apr 17, 2010


When was the last time you replaced the batteries? These units will not start with old / failed batteries connected, or without batteries connected.

If you have a voltmeter, check the batteries. Your unit should have two batteries harnessed together. if you check the individual battery, you should see just over 13 volts, together should be around 26 volts. if you see less than 12.5 volts, that would be why the unit will not start.

You will have to replace the batteries if that is the case. Your BP1100 takes an RBC 7: moz-screenshot-1.pnghttp://www.refurbups.com/APC-RBC7-Compatiblemoz-screenshot.png

APC Back-UPS Pro... | Answered on Apr 14, 2010


hi, i don't have the schematic but, i think if you connected the batteries okay and had switched off the machine then it should work. when switching on there are two sounds that come, first its a beep, if you release the ON SWITCH the UPS will just do a self test then shutdown. to switch ON the UPS completely don't release the on button until you hear a second beep, if you release the ON switch when this beep is on, then the UPS will be ON completely.

APC Back-UPS Pro... | Answered on Jan 01, 2010


If the unit works ok on mains power, then it is the usually the batteries causing this, New battery i think you need.

APC Back-UPS Pro... | Answered on Nov 15, 2009


If you do not get any output and you know for sure you are plugged into a good receptacle it could be the internal fuse blown. Most good UPSs' come with an internal small glass body fuse. You have to get inside to check it, but be CAREFUL because they have capacitors in them that will stay charged for a few minutes after you unplug it, depending on where the fuse is. Also, have you looked all over it for a reset button? If you are going to get inside, dont be scared, just wait ten minutes, then if you see a fuse, remove it and if the filament is burned in half,or the glass is blackened, make sure you replace it (Radio Shack) with the EXACT same rating (amps, voltage) found on end of fuse, but usually in a universal code Number.
If that doesn't do it, it could be more to repair than it's worth. BTW I am a Master Licensed Electrician, good luck! get back if need more help.

APC Back-UPS Pro... | Answered on Nov 15, 2009


Check the relay Circuit. the relay switch must be faulty

APC Back-UPS Pro... | Answered on Aug 14, 2009


try plugging the pc directly into the wall...if it works the UPS is defective.  You can order new batteries for the UPS online.
Battery Planet.com

APC Back-UPS Pro... | Answered on Mar 13, 2009


possibly..you have unpluged or dislodge you power cable from the outlet or from the power plug shuye at the back of your ups.. double check all the plug and re plug all your power cables !!!! make sure they are tightly pluged in and firm in their outlets..

APC Back-UPS Pro... | Answered on Feb 12, 2009


no t required

APC Back-UPS Pro... | Answered on Mar 17, 2008

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