Question about Powerware PW9150 12.5KVA/8.75KW (pf1221114ue0010) UPS System

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Ups drops load at unpredictable times. battery is good

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If the load is dropped then there is a serious fault with the ups, even if the inverter fails, it should go to bypass and not drop the load.

Sound like a control fault, I suggest you need a ups tech.

This equipment has many dangerous parts inside. Batteries are always live and very dangerous. The boards are stuffed the surface mount components.

You need an approved service agent, who should be able to help

Posted on Sep 24, 2009

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Posted on Jan 02, 2017

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I put a new starter on a year ago. today put on anew alternator and my truck will only turn over a few times quit


Battery ? battery cables ? Test the starting system , voltage drop starting system ! go on you tube a check out voltage drop testing starting system .

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1 Answer

I have a 1995 poniac bonneville and every time i press the brakes the gauges drop. Battery is good. Alternator good. Lights dim and some time kills my car


the brake lights will not kill a car or dim lights so there is a massive short in the system or the battery is not as good as stated
check for battery terminals ( posts and terminals) are shiny clean and tight including the ground wire for the battery
have the battery load tested ( not voltage tested )
check the alternator output ( auto electrician ) check the drive belt is in good condition and tight

Oct 21, 2015 | Cars & Trucks

2 Answers

Where is the problem with "-DC bus low" EX11RT?


How are you checking the batteries? If you are simply reading the voltage with a multimeter, then this is probably your issue. The batteries, when getting worn out, will often show full voltage in a static (non-loaded) state, but as soon as they are called on to produce load, their voltage will drop significantly, thus giving the DC bus low indication. Batteries in UPS's are similar to car batteries, they need to be tested under load to ensure they are good. If they are three years old or older, chances are they need to be replaced.

Jun 18, 2015 | Computers & Internet

1 Answer

I ride a 1986 shadow 500 with 32000 miles. recently it started acting up. the rear cylinder cuts out as i ride and it can last for several miles before it picks back up. At the same time, the RpM display...


You need to check for spark when the back cylinder is not firing to see if that is the problem...from there it will be easier to troubleshoot...also check for vacuum leaks.

Jul 26, 2011 | 1986 Honda VT 500 C Shadow

1 Answer

CHARGER NOT SHOWING ANY KIND OF INDICATION THAT UNIT IS ON OR NOT


You need to insert two healthy cells (together on either side) before the indicator will illuminate.
If it doesn't, then the charger might be faulty.
Open circuit cells will also cause the same symptom, although it's very unlikely that you willl get more than one out of four failing. Dropping a cell can cause unpredictable results.

Mar 27, 2011 | Quantaray Rapid Battery Charger with 4...

2 Answers

Battery on full charge then start truck drive to town and noticed volt gauge at low turned lights and access off got home shut truck off tried starting after shut down and noting but dead bat havn prob...


You need to fully charge the battery and load test it, then check the charging system and alternator drive belt for tightness. do not remove cable when running or it can harm the charging system...ok on older cars, no longer good practice. Quick check of charge system can be done with volt meter across the battery. Volts should read between 13 and 14volts and not drop over time. With all lights, heater etc on volts should be better than 12.5 (usually above 13 and again, not drop with time.

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1 Answer

THe remote key on my jeep works 60% of the time


unfortunately this is rather unpredictable. for the low cost of a battery, i would try that. if the key still is unreliable, then you know what your next step is... good luck!

May 28, 2010 | 2005 Jeep Grand Cherokee

2 Answers

Why would batteries recharge in an unpredictable manner? Sometimes they are fully recharged and the next time the show they are recharded but they are ot.


This normally happens when the Power IC of you phone is blown. Due to which the battery is not able to hold the charge. Even if you purchase a new battery it will give you the same problem. You can get the phone repaired by changing the power IC.

This issue occurs when the phone is dropped onto a hard surface.

Hope this information is helpful to you. Please do not forget to rate this solution.

Thank you for choosing Fixya

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I had the same problem, and i fixed, it's not totally true, the inners electronics components suffer damage with time, i think the hings and flex suffer needs to be cleaned with time, I follow the instructions at http://www.hpcfactor.com/support/cesd/h/0046.asp with to much care, an voila no more recallibrations needed,

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1 Answer

1999 VW beetle won't start; battery good


the "brain" of the car might be giving out. one thing about the brain is it controls everything...mainly the cpu thats gives out codes!

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