We plug in an SMX1500RM2U unit that has been in storage for a few months... it completes the self test normally.. imput/output voltage shows 115V 60hz battery 100% - there is nothing plugged into the unit 0 Load.. after about 30mins the red light on the front (triangle with ! inside) and the unit will beep once every 60 seconds with the words "Warning Power overload"
it is an older version of this model (probably 5yrs old don't have firmware/ser# in front of me right now) but I remember the UPS Couldn't be firmware updated via the AP9630 only by a serial port which we didn't have any PC's with this connection.. has anyone seen this problem before?
Your ups are over heat, and maybe the big chock inside ups are shorted and after a while this error happen.
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