Question about Computers & Internet
UMAX 500 VA, momentary power off while in utility mode. Green light remain ON. Battery replaced but fault persists. Battery mode OK. Suspecting AC to DC converter stage. Can I disconnect the battery and test in utility mode? sugestion please.
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Posted on Jan 02, 2017
It sounds like you need a new battery. If the APC is more than 3 years old, that is likely the problem. You can get a new battery from http://www.batteryinternational.com/apc-backups-es-be500u-ups-battery-ups-batteries-f2.html
Posted on Jun 23, 2009
I have the same PCB on my Deltec PRR2200i. I at least know a few things about the circuit now. I had 11 transistors explode on mine and am replacing them now. Sadly I have not managed to track down a circuit diagram.
Posted on Mar 30, 2010
Try and push and hold the on button for about 3 sec. This will start a manual battery test. If only three of the five battery led illuminate allow the ups to recharge the batteries for 24 hours. Battery light flashing means internal battery source not available. Check battery connection, completely power down and reboot UPS
Posted on Sep 08, 2011
Testimonial: "Thanks, Battery source was not available - internal fuses were blown. Replaced fuses and unit is now functioning fine."
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