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Best Technologies UPS manual LI660va or LI660

OK, so I had a problem running down an error code on an old Best Technologies Fortress LI660 UPS.  Code was “A 4” which turned out to be “Alarm” code 4. Just means I have a battery going bad. I think this UPS takes two 12V batteries.

I like this UPS, easy to read buttons, shows Voltage out and Line in and whether you are in a brownout condition.

Manual is here. best-power-fortress-li-user-manual

I found other Best UPS manuals here


Hope this helps someone else.

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