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Battery charging problem

I have a PW 9110-6000 VA unit with 2 additional battery modules, (total 100 batteries - 35 Ah) The battery charging circuitry appears not to be working as the UPS constantly discharges the battery packs even with normal input of 230v. the discharge rate is approx. 600mA with no load on the UPS output. I have temporarily provided an external charging system arranged to provide 14.1 v across each battery which has solved the discharge problem and the UPS works perfectly. However, I am concerned regarding the standing voltage of ~285v being applied to the UPS across the battery packs. If possible, could you please provide some basic information regarding the charging circuitry to enable me set-up / repair, or failing that, confirm the "safe" battery voltage under charging conditions. I look forward to your response Thank you

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Well, the charging voltage is the right one, you may have a problem with charger board, did you check that? tbe 2 big capacitators, maybe you will need to change them, there could be a couple of things, and to be honest i don´t have the circuits sheets, cause i stopped working with powerware.
good luck.

Posted on Jul 29, 2008

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How do you check the battery status?


Check battery voltage using Volt meter=> it should be about 12.6 to 13.8 vdc.
Pull the battery out... checking the deforming at the case ..such as "swelling"... if yes .. replace the battery.
Replacement battery is about 10-20 dollars on e-bay (watch for shipping charge and size. and terminal connection sizes )
The average life of battery on UPS is about 5-7-10 years wi)th UPS plugged in (Charging
One I had my local Autozone checked my 12 VDC -8 AH ... ask them to set CCA at about 100 AMP...
for 12 VDC -14 AH ask them to set CCA about 200 AMP.
For a 12 VDC -75 AH (group 24) they set the load on their tester at about 700-900 CCA.
You can also buy a manual battery load test at Harror freigt tool for about $20 US dollars (On sale)

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2) The UPS itself is faulty and can't charge/maintain the battery. The entire unit should be replaced.

I recommend solution 2. I had the 725VA in this consumer UPS line and when I replaced the battery, the UPS could not keep the battery charged with any load on the unit.

Check your warranty, though. The APC warranty is for 2 years on this model.

I hope this helps.

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