425 continuous beep and red light

[jefferis]

So, I read some solutions but my issue is slightly different.  I had a 1 sec power failure/surge.  The 425 started a long continuous beep with a red light.   I turned it off and  waited a few seconds but it kept flashing from green to red and beeping.  So I turned it off and unplugged all devices, waited a minute or 2 and then plugged in 2 into the surge protector and 1 less than before into the backup.  I turned it back on and the red light went away.      Any ideas what might be an issue.  The backup plugins do not have a huge power drain.  A modem, wifi antenna and backup NAS. 

[JonPro]

Hi @jefferis 

Will you be able to share the exact model of the UPS and the wattage drawn by your load?  I am thinking that the device might be showing an overload condition or a hiccup.

Plug your load one at a time and each time you plug them, unplug the UPS from the wall outlet to see if you could replicate the issue.