APC UPS SL40KHB2 FAULT SIGNAL ON DISPLAY

[Anonymous user]

This ups systems ssuddenly started displaying 100% load capacity level while on no-load after being energised and fails to back up despite having its battery replaced two months ago.The unit gives an intermitent beeping sound and i checked all voltage parameters wwhich were ok.Could you tell me which of the boards may be causing this problem or any other cause.and how can i rectify this fault?

E.O.

Message was edited by: alaman

[BillP]

How old is the unit if you dont know provide the serial number

[BillP · Accepted solution]

Also I would guess the output board ... if your that demented start testing every component on the controller board and output board
it also could be a bad power supply