20 Most Recent Eaton Powerware 9355 UPS System Questions & Answers


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.

Eaton Powerware... | Answered on Mar 02, 2015


Seems to have had a power glitch, is the system back to normal?

Eaton Powerware... | Answered on Jan 05, 2015


it looks like you have a faulty static switch

Eaton Powerware... | Answered on Jan 05, 2015


it indicates you have a polarity issue on your bypass feed. Most likely L1, L2 or L3 are mixed up (rotated). So you are using L2 as L1 or something like that. You should check (measure) the phase rotation/polarity.

Eaton Powerware... | Answered on Dec 13, 2012


UPS used lead acid batteries which die after 3 or 4 years. Disconnect the power and open it to see which ones it uses. You will know they are dead if they have swollen or melted. Buy replacement batteries.

Eaton Computers... | Answered on Apr 09, 2019


see the instruction booklet for that - - - or contact eaton directly.

Eaton Computers... | Answered on Feb 04, 2019

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