Question about APC Back-UPS ES 350 - UPS ( external ) - 350 VA - UPS battery lead acid - 6 output connector(s) (NEWITEM13161548) UPS System

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APC UPS issues

We are using 75+ APC Back-UPS ES 350 and some of them have started to report line noise and switching on and off of battery power.

How would an electrician fix a line noise problem in a large office building with cubicles on different floors having the same problem?

Thanks

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It is a faulty Neutral or Ground.

Most likely the Neutral will be the issue. That means the subpanel or the main panel needs to be serviced by an Electrican.

Posted on Sep 08, 2009

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If its really a noise? neutral and ground of your utility power (building transformer) should be bonded

Posted on Aug 14, 2009

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1 Answer

Found an APC UPS 350 in the garbage, seems to work, but I don't understand the difference between having the power button engaged or not because both ways it seems to power my devices.


you may have a defective switch that is on/off button and is not serviceable.
I suggest you purchase a new APC model and by pass the headache here unless this is a project. You will need to take this unit apart and then call the manufacturer for a new part that may or may not be available or the unit is discontinued.

Jul 03, 2010 | APC Back-UPS ES 350 - UPS ( external ) -...

1 Answer

UPS shuts off intermittently and beeps


More than likely it just needs a new battery. If the power is sagging (called a brownout) the UPS is trying to switch over to the battery to keep the power consistent. The beeping is probably a code that indicates there is an issue with low voltage on the battery. New batteries are around $20-25. Here's a link to the replacement battery: http://batteryinternational.com/apc-backups-es-be350es-ups-battery-ups-batteries-f1.html

Hope that helps.

Jan 21, 2010 | APC Back-UPS ES 350 - UPS ( external ) -...

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APC Back-UPS ES 350 - when powered on has a blinking green light Is this normal


A blinking green light is likely an indication that the internal battery is nearing the end of its usable life cycle. If it's over 3 years old this is likely the case. To test, plug something in to the battery outlets and pull the plug of the UPS from the wall. If you get a short runtime (or none at all) it's the battery. Batteries are under $20 and can be found here: http://www.batteryinternational.com/apc-backups-es-be350u-ups-battery-ups-batteries-f1.html

Oct 06, 2009 | APC Back-UPS ES 350 - UPS ( external ) -...

1 Answer

Need charging instructions for apc back-ups es 350


Take off the bottom cover and make sure the battery is connected (both terminals).
Plug the unit into a wall outlet.
Press the power button to turn it on. Leave it plugged in for 8 hours to charge the battery. Do this with nothing plugged into the unit.

Done.

Aug 08, 2009 | APC Back-UPS ES 350 UPS System

2 Answers

APC external Backup battery is not working plz


It may just need a new battery. The UPS will do a self test on the battery when you turn it on. It may have tried to read the battery and the result came back as "failed". The batteries last about 3-5 years, even less if you live in an area with bad power. The batteries are very easy to change. You can buy replacements at www.batteryinternational.com/apc-backups-es-be350es-ups-battery-ups-batteries-f1.html

Jun 08, 2009 | APC Back-UPS ES 350 - UPS ( external ) -...

1 Answer

APC ES-350 won't turn on; all I see is a blinking light.


Try looking for a small circuit breaker on the side that says "press to reset" - you could have tripped it accidentally when you unplugged the iPod.  Also, try pressing and holding the UPS power switch for 10-15 seconds.  That should force a power on as well.

May 27, 2009 | APC Back-UPS ES 350 - UPS ( external ) -...

2 Answers

APC ES350 strange noise


My solution was to unplug everything, hit the reset button, and then power the unit back up. The problem I found to be that I had my laser printer connected to the "surge + battery" side, and for some reason no laser printer can be connected to it.

Sep 28, 2008 | APC Back-UPS ES 350 - UPS ( external ) -...

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