Tripp-lite Internet Office UPI 350U series has red light flashing by "Overload/Check Battery." What should I do. Thanks

Tripp Lite SmartOnline UPS Systems: Troubleshooting ...

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May 28, 2013 - Uploaded by Tripp Lite Tripp Lite SmartOnline UPS Systems: Troubleshooting & Service (Part 6 of 6). Tripp Lite ... Ultimate Battery BackupHack/Mod. - Duration: 10:12.

unplug the ups from the wall. does it stay on? If not replace the batteries

From the User Manual:

“OVERLOAD/CHECK BATTERY” LED: this red LED lights continuously after a self-test to
indicate the capacity of the battery-supported outlets has been exceeded. To clear the overload, unplug some of your equipment from the battery-supported outlets; then use the ON/OFF/TEST button to run a Self-Test. If the UPS continues to detect an overload, remove more equipment and repeat the self test until successful.

CAUTION! Any overload that is not corrected by the user immediately following a self-test may cause the UPS to shut down and cease supplying output power in the event of a blackout or brownout.

The LED flashes to indicate the battery needs to be recharged or replaced. If the LED flashes (and a continuous alarm sounds) during a prolonged blackout or brownout, the UPS’s batteries are nearly out of power; you should save files and shut down your equipment immediately.

If the LED flashes following a UPS self-test (after the UPS is turned ON), it may indicate that the battery needs to be replaced. Allow the UPS to recharge continuously for 12 hours; then use the ON/OFF/TEST button to run a Self Test.

If the LED continues to flash, contact Tripp Lite for service. Should your UPS require battery replacement, visit Tripp Lite on the web at www.tripplite.com/support/battery/index.cfm to locate the specific replacement battery for your UPS.

Hope this helps!

full charg and then check

Unplug the computer. Then run the UPS self-test and the unit will display whether it finds an overload fault, whether the battery needs to be charged or replaced.
Here are the instructions (copied from the User Manual):
Turn UPS on: Press and hold the ON/OFF button for one second.

Run a Self-Test: Press and hold the MUTE/TEST button for two seconds (until alarm beeps several times).

The test will last 10 seconds. All LCD Display icons will be illuminated and the alarm will sound.

If the fault icon remains lit, the battery-supplied outlets are overloaded. Unplug powered devices until you remove the overload.

If the "Replace" icon remains lit and alarm continues to sound, the UPS batteries need to be recharged or replaced. Allow UPS to charge for 24 hours and repeat self-test.

If there is only two wires, the breaker is a current sensing device which connects in series with the circuit. which wire goes where should not matter.

change the battery and try

this unit come with 4 with battery backup of 12v 7ah. check what are the indicator display shown?
it very diffcult know what the problem if u can give more info. u can try to replace the battery with new batts.. and test the ups if it not beeping again it show the battery problem. or maybe you had plug in more the the power consumtion that why it keep sound the alarm indication overload try to serperate the load. if u wan a user manual go to this website to download the manual: http://es.tripplite.com/support/manuals/index.cfm
u will get will u wan...

it's mostly a battery issue..how old is that unit?

Quit out the screw in the back of the equipment, QUit out the battery power supply under the device.
Greetings