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Best Fortress, LI 460VA UPS help

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richard gagnon

New Member
I have a Best Fortress, LI 460VA UPS that appears to be working
normally. The unit powers up ok and goes through a self-test, which
then shows pass. Then the alarm sounds and the alarm light flashes. I
get an alarm light with A0 on the 4 digit readout. I can hit cancel to
quiet the alarm but the alarm light continues to flash. The display
continues to show A0. I can check the battery voltage and power usage
but the display returns to A0 after a couple of seconds. The unit has
a serial port but I do not use it. Three years ago I took the unit out
of service when the batteries failed. I just found a couple of new 12v
batteries and powered up the unit with the resulting conditions.
When I disconnect the 60hz mains the unit goes into battery operation
as it should and supplies 120vac.
Anyone have any ideas and the list of possible fault codes ?
Thank you.

Richard
 

Sebi

Active Member
Maybe the new accu no fully charged.If the charger part of UPS work, about 6 hours can charge the battery full, and - i hope - the fault disappear.
 

richard gagnon

New Member
The UPS has been on charge for two weeks with a 40va load. Best was bought out a few years ago. I just found the company that bought Best Power Products. I will try to question them.

Richard
 

richard gagnon

New Member
I found out Best was bought by http://www.powerware.com/ a few years ago. I called them and I was told that A0 is related to an issue with the outlet the UPS is plugged into. In my case, the UPS was plugged into a ground fault outlet which gave a weird condition to the electronics. The electronics look for a bad ground, hot/neutral reversal and a couple of other possible conditions. A manual is being sent to me.

Richard Gagnon
 
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