Hi, ups is constantly beeping when i connect into mains. There are three -batteries 36volts. But the problem is that there is no any indication LED light on display so it seems there is no power at all on display. LEDs shoud be controlled through some driver? Why its beeping at the same time? There is no voltage on the "ON" button. Any ideas? Please , will be glad hear any suggestion.

 

What does the user manual say?

 

What does the user manual say?

Uh yeah, make and model with manual user codes for beeps?

Ron