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I have APC RS 600 and it's powering on but relay is making continuous sound tttrrrrrr.....

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: APC Smart-UPS 1000VA is powered on but not working

Try turning the unit off for a little while, unplug it from the source even. afer about 5 minutes plug it back in and try it again. You may have a bad battery, how old is the unit. UPS batteries should be changed out every 3 year's, max every 5 year's if you want good reliability. At 5 years you are taking a chance.

Posted on Jan 25, 2007

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uk8ahw
  • 3 Answers

SOURCE: ups is not glow any indication, just give buzzer

It look like dead battery. Try to connect carefully new (or allmost new) battery with 24v lamp in (+) wire. If UPS alive - you'll see only small momentary sparcle. After this - connect battery as usual and try to turn system on. Be carefull! If lamp lit in full power - it means a serious internal problem. Best solution - look for qualified serviceman. (maybe yoir system needs reprpogramming).

Posted on Apr 14, 2009

jvpacoin
  • 91 Answers

SOURCE: Overload light in APC RS 800 UPS

it seems that the inverter circuit of your UPS is dying. the solution here is you have to open up the UPS and check the inverter circuit. to make easier, check the power mosfet if its leaking.

Posted on Aug 14, 2009

  • 19 Answers

SOURCE: APC Back-UPS ES 500: green light flashes&continuous warning tone

On this unit, the likely culprit is the battery and that it needs to be replaced.

With that, you may want to think about the pros and cons of replacement versus buying an entirely new unit.

This unit is a relatively low end ups and the surge supression uses MOVs that wear out with repeated absorption of energetic spikes. That's why the better (and higher cost) UPSs and surge suppressors don't use them. They're not really that good anyway due to their relatively high transient impedance. The better equipment uses a "transorb" -- basically a back-to-back high voltage zener diode optimized for low breakover impedance and high instantaneous power capability. Unless the transient exceeds the design parameters of the circuit, these do not wear out and do not degrade. That being said, I will assume that you would likely replace this unit with a similar one.
The flashing may not be the battery at all and may be the charging circuitry, thus your new battery may not live very long (half the life that you would expect.

Many batteries out there are refurbs and have issues as all used parts do.

If you contact APC, they will likely give you a 35% discount on purchasing a new product.

The difference in price in the battery replacement vs. ups replacement at this level may only be a few dollars more.

I promise that I am not a UPS salesman, I just deal with many on a daily basis; therefore I am giving my two cents to try to thelp you avoid problems a year from now.

Posted on Dec 30, 2009

Testimonial: "Outstanding answer with right amount of detail. I swapped battery with identical APC UPS that I have and vfd that battery was cause of warning tone."

  • 1 Answer

SOURCE: APC Back UPS RS-1000 Overload LED with beeping sound after on.

in the end solution is you have to bring it nearest apc service.
if you loaded more than its max. capacity at past, the sensor of power is geting burn the sequare wave generator IC.
so you need help with that, olso complicated.
I live the same position with my rs1000, horrible :((

Posted on Jan 09, 2010

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What causes damage to the IC called TNY275PN in APC RS 600 UPS??


Buy the APC SMART UPS 1000VA or higher. Those can allow setting of norminal voltages and boost or buck limits. The Boost and buck of Smart UPS function like an Automatic voltage regulator.

The cheaper UPS are built for nominal voltage of 230V +- 10% and cannot be changed. Overvoltage is cause of your UPS failure.

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I have APC RS 600, 360W battery which is not working that means O/P voltage 230V is nill there is no Output supply . I checked the ckt but when switch on the ups it will start alarm and even i check the...


Hi Datta,

It seems that you have the wrong battery in that UPS. The replacement battery for that unit should be an RBC2 -or- a 12v 7.5ah battery ($28 delivered). The UPS will not work without the correct battery in place.

If you could provide me with the exact model number I may be able assist you further.

If you need UPS, Surge, or Power Related help contact Daniel @ Power & Systems Innovations 800.260.2259 or go to our website: http://psihq.com/
** If this helped - Give it a Thumbs Up :) **

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it seems that the inverter circuit of your UPS is dying. the solution here is you have to open up the UPS and check the inverter circuit. to make easier, check the power mosfet if its leaking.

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Ups is not glow any indication, just give buzzer sound , APC make 2000va RS model kindly tell me what i can do to repair it.


It look like dead battery. Try to connect carefully new (or allmost new) battery with 24v lamp in (+) wire. If UPS alive - you'll see only small momentary sparcle. After this - connect battery as usual and try to turn system on. Be carefull! If lamp lit in full power - it means a serious internal problem. Best solution - look for qualified serviceman. (maybe yoir system needs reprpogramming).

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Try turning the unit off for a little while, unplug it from the source even. afer about 5 minutes plug it back in and try it again. You may have a bad battery, how old is the unit. UPS batteries should be changed out every 3 year's, max every 5 year's if you want good reliability. At 5 years you are taking a chance.

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