Apc 1500 red overload stays on pleeps after about 8 hrs

Take the battery out and see if it does the same thing when you turn it on.

mosfet

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.

remove the load fom the ups and restart the ups. if the ups alarms again then the problem is in the inverter.

Try unplugging some equipment from the UPS. The total load should be less than 865 W. Printers and scanners often are culprits.Some gaming desktop computers can have a power supply that will be too much for this UPS. (I've found that even having the printer on the surge only part of the UPS can be a problem. I have the printer on a separate surge protector.)

Since the overload is new, did you add any equipment to the UPS recently or upgrade components?

If you reduce the load, and the problem continues, the UPS may have a fault in the circuitry. If it is under warranty, contact APC.

I hope this helps.

Cindy Wells
(I have replaced APC units after 3+ years when they can't properly recharge the battery - with a new battery. The symptoms are 1) getting a overload when a small load is on the UPS. Small load - desk lamp, 13" TV or 2) not keeping the item on when the power goes off.)

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.

Check all MOSFET.

Unplug the printer. Generally, a UPS is to let you safely save your open files or documents and safely shut down. It is not really meant to keep everything such as printers and other items running.
If it is a laser printer, that is the problem.
If you have an older CRT monitor, that uses a large portion of the battery power capacity.

Also, never plug in a "heater" into a UPS.

hope this helps!

Hello,

With a 980watt load the run time is only 7 minutes on a brand new battery. If you have the system on full load your run time will be much less and it has likely damaged the battery. here is the APC web site page for your model. If you are running that much equipment I think you need either a bigger UPS or another 1500 and spread the load out.

Buddy
Corporate Computer

Hi,

Plz check MOSFET which working in inverter section.