Question about IBM APC Back-UPS Pro 350 (22P5090) UPS System

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My APC350 backup ups has a overload when power is interupted with no load connected. The unit will start beeping but does not supply battery back up. The power supply to the battery shows 14.4 volts and the battery when disconnected is holding at about 13.8 volts.It recieved a power surge during a storm a while back but still was working.

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It may still be supplying power but the surge arrestors were probably damaged by the surge. Go to apc.com choose support from the menu bar, they should be able to help or maybe even replace your unit.

Posted on Jun 06, 2010

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Troubleshooting back-up malfunction after replacing battery. Checked main power supply breaker and battery power supply fuses for continuity. What should I try next?


Depending on the type of unit, you do not state any model. It may require 6-8 hours of being plugged in and turned off before the battery has enough charge that the ups will turn on.

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Error light in my apc smart ups sc 1500va ups


1. Four beeps every 30seconds (On Battery LED will be illuminated)
This alarm indicates that the Battery PowerSupplied outlets are now supplying battery power as opposed to power from theutility. If the UPS determines that the input utility power is unsafe for yourcomputer equipment, 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 Batterycondition has been reached and that the UPS will soon shutdown. Once the UPStransfers to On Battery operation, it can only stay on battery for a limitedamount of time. The UPS will sound this alarm about two minutes before thebatteries are totally exhausted. Once exhausted, the UPS will shutdown and turnoff its output power to your equipment. If you hear this tone you shouldimmediately shutdown your computer to prevent data loss or corruption.

3. Continuous Beeps for 30 seconds (BackUPS OFFICE 250 and 280 ONLY)
This alarm indicates the unit has detected anOverload condition after it has performed a self-test during start-up.

4. Continuous Two-Tone Beep
This alarm indicates a severe Overload wasdetected while the unit was on-battery operation. This tone will continue tosound until the unit shuts down.

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

6. Continuous Tone (On Line and On BatteryLEDs flashing) Back UPS OFFICE 350,400, and 500 ONLY
This alarm indicates that an internal UPS faulthas occurred.

Dec 08, 2011 | APC Smart-UPS SC 1500VA UPS System

1 Answer

Why does battery beep and tells me its on battery power when it's stil plugged to wall. and i have a good power source


Usually that indicates a low battery charge or bad battery. Make sure you do not have the battery backup side overloaded with too many devices. Do not plug inductive loads with motors or heating elements into the backup. Turn the device off and unplug anything that is plugged into the bachup. Plug the battery backup into the wall with nothing attached and turn on. Wait 10-15 minutes. this will charge the battery. If beeping continues after this with nothing attached, you likely need a new battery or the control/monitoring system is bad. If beeps stop, reinstall and do not attach more wattage than the unit can suppluy

Jan 06, 2011 | APC BX800 Back-UPS XS 800 (APNBX800) UPS...

1 Answer

When the power button is turned on my apc350 makes a high squeal sound, what is this? I have to have it turned on to use anything that is plugged into the battery backup outlets.


Double check the connections on the internal battery. If you have had the unit for a year or longer it may be telling you your back up battery isnt any good. I suggest replacing the battery, go here http://www.apc.com/tools/upgrade_selector/index.cfm

Mar 15, 2010 | APC Back-UPS ES 350 - UPS ( external ) -...

1 Answer

When the power goes out it just beeps. If I unplug everything then on battery light comes on. So as long as it's pluged up it says on line.


Check that you have not overloaded the UPS. Also check that you have not connected any printers or non-computer loads to the battery-backed supply, especially laser printers which can easily overload a small UPS when the fuser operates.

Failing this it does sound like the battery is failing under load. Expect about 2 - 3 years typical life from small UPS batteries.

Feb 22, 2010 | APC Back-UPS XS900 (BX900) UPS System

1 Answer

My UPS Turns itself off


This advice relates generally to small UPS units.

More than likely it was the UPS that was beeping because it was supplying the power from its inbuilt battery, rather than the CPU. From the model number, I would predict that this particular UPS is an 800VA unit. Presumably it has worked reliably since its original purchase.

You may be experiencing power network disturbances that are resulting in low voltage (otherwise known as 'brownout'). This could be a 'new' or 'temporary' power issue or something that may now be more permanent. Some examples of 'new' issues that can lead to low voltage include: a neighbour operating a large welder, an X-Ray clinic opens next door or the power supply authority incorrectly adjusts transformer output or overloads the grid (new subdivision?). Look for likely external issues and if found address these with the relevant party.

Be aware that an 800VA UPS may only run a PC for 10 -- 15 minutes (not 45 minutes or more) before the battery is flat and the unit shuts down and has to be restarted. It can also take many hours for a battery to fully recharge and if there are repeated demands on the UPS to supply power over this time then the recharge period will be extended.

Also check that you have not overloaded the UPS by connecting any printers or non-computer loads to the battery-backed supply, especially laser printers which can easily overload a small UPS when the fuser operates.

If chronic unresolved low supply voltage is a problem, check the user manual / software. Some UPS manufacturers provide adjustments for the lower voltage threshhold -- i.e. the supply voltage at which the UPS will come online to supply the load. This can be reduced to avoid unnecessary operation of the UPS.

Finally, a typical life for a small UPS battery is around 2 - 3 years. Problems described could be attributed to a failing battery.

Feb 21, 2010 | Energizer ER OF800 (ER-OF800) UPS System

1 Answer

Strange noise comes out from the ups after a power cut


The Back-UPS Office unit has five different tones or alarms:

1. Four beeps every 30 seconds (On Battery LED will be illuminated)
This alarm indicates that the Battery Power Supplied outlets 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 computer equipment, the UPS will switch to battery power.
Note: If the power disturbance is brief, you may only hear one or two beeps.

2. Continuous Beeping (On Battery LED will be illuminated)
This alarm indicates that a Low Battery condition has been reached and that the UPS will soon shutdown. Once the UPS transfers to On Battery 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 are totally exhausted. Once exhausted, the UPS will shutdown and turn off its output power to your equipment. If you hear this tone you should immediately shutdown your computer to prevent data loss or corruption.

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

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

5. Continuous Tone (On Battery LED will be flashing)
This alarm indicates that the battery-powered outlets are overloaded.

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

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1 Answer

Unit keeps beeping even when unpluged. over load


UPSs will beep when unplugged to tell you that the mains is off! Overload should reset if you disconnect both the load and the power.

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