Question about Minuteman Pro 520 Battery Backup (MMNPRO520) UPS System
You can find the owner's manual for the Minuteman Pro 520 UPS HERE.
You can find support for Minuteman UPS' HERE.
Refer to page (4) of the owner's manual for a description of the UPS' front panel controls and indicators.
Looks like if the 4th LED from the right is on, you need to replace your battery.
Left to Right the LED's are:
(1) Online; Boost; or On Battery (depending upon the symbol that is illuminated)
(4) Replace Battery
Please, let us know if you have any more questions, observations, comments, etc. on this topic. We are happy to help.
Posted on Apr 15, 2008
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Posted on Jan 02, 2017
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It is a PDF file, which requires that you have Adobe Reader or equivalent installed on your computer for it to open and display properly. If you don't have it, it can be found here (it's free!):
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