I have an Eaton 9355 UPS that has gone into bypass with an error code 281. How do I trouble shoot this? Is there literature that shows what the error codes are and how to rectify them?
SOURCE: hi we have problem with 6kva 9120 eaton ups,
The Poweware UPS is a true on-line UPS System, so it will handle sustained over and under voltages to +20% and -15%. If you are getting input spikes, the UPS has MOV's which will handle input spikes, and if too great a spike, the MOV will die attempting to save the UPS output load. If you are having further UPS input problems you need to put a good quality surge arrestor at the panel feeding the UPS on BOTH circuit legs feeding the UPS.
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.
Well, here's the manual and I can find no numerical alarm codes in this manual.
http://static.ziftsolutions.com/files/8afe1787416e8d3d014175ca30004cbb.pdf
http://static.ziftsolutions.com/files/8afe1787416e8d3d014175ca30004cbb.pdf
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