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Hello I have A Eaton ups 9355 one error is sawing there battery not connected. how can i solve this problem.

Posted by Ashok sharma on


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SOURCE: Battery Packs for Powerware 9355 UPS

If you battery packs are all at 130volts DC, then all of the packs will have become dead, and the batteries are not recoverable. Your battery DC bus voltage on a Powerware 9355 20 to 40kVA rated UPS is nominal 432 volts DC - 36 batteries in series in each string at 12 volts DC per battery. If batteries go below 10.5 volts DC each, or 378 volts DC bus voltage, no amount of charging will recover these batteries. You should not be recycling the DC battery breaker, unless you felt the battery breaker was faulty. The UPS would have given you an alarm message of either battery breaker Off, Charger Failure, or Low DC Bus Voltage long before the these batteries failed.
The battery test will not proceed if the batteries are dead.

Posted on Feb 11, 2011



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SOURCE: If Eaton APS6-059 UPS is connected to 48v DC(Car batteries in series eg.) can the 220v AC outlets power electrical appliances of suitable rating ?

What is the rating on the output of the UPS? kVA? Output Amps Max?

Posted on Sep 12, 2012



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SOURCE: i have an eaton UPS 9355 and i would to know how can i find the solution of some alarme codes like #74 #119 etc

Well, here's the manual and I can find no numerical alarm codes in this manual.

Posted on Feb 26, 2015

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I have an Eaton 9355 20kva system. Theres an alarm #188 Bypass Failure and notice#105 Bypass Not available. The batteries are also not charging or the battery current is reading 0 amps. When the power goes...

Bypass failure is the same as your input unless you have a dual input. You lost power and the UPS did not hold the load because the batteries are bad. Replace the batteries and you will be ok.

Feb 18, 2013 | Eaton Powerware 9355 UPS System

1 Answer

I WOULD LIKE TO BUY A NEWPowerware 9330-40kva UPS UNIT, COPLETE WITH BATTERIES .how much would that cost?

It's unlikely that you will be able to get a new one. The 9330 was discontinued many years ago though Eaton continues to service these models and provide replacement parts/batteries. I suggest that you call 800-356-5794 to see if Eaton has a partner that has any complete systems still in stock or in service inventory. The new UPS units are the 9355 and the 9390: and These new units are more compact, are more energy efficient and incorporate more advanced technology for monitoring and communication.

Mar 11, 2011 | Powerware 9330 40 (A40401110031112) UPS...

1 Answer

I have a Powerware Plus UPS system and it not in normal mode. It is simply not working for our hospital any more. HOw do I purchase a new one or repair the one I have temporarily

Here is the documentation page for the Plus 36: The Powerware Plus 36 can be serviced but it is a legacy product that is no longer manufactured. Eaton purchased Powerware and retained the service organization so there are lots of people trained to service this unit. For a replacement unit, you'd probably be looking at the Eaton 9355: For Plus 36 service, here is the contact info: Toll Free: 1 800 843 9433
E-mail: [email protected]

Nov 27, 2010 | Powerware Plus 36 UPS System

1 Answer

Our UPS powerware 9335 cannot be on anymore, only bypass we are using.

It's hard to pinpoint the issue without more information. You may just need to replace the batteries. I encourage you to reach out to Eaton (Eaton purchased Powerware about 6 years ago). Here is the product page where you can download the manual:
Here is the contact info.
Toll Free: 1 800 843 9433
International: +1 919 871 1800
E-mail: [email protected]

Nov 15, 2010 | Powerware 9335 UPS System

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