APC Back-UPS XS 1500 - No AC after battery change

[CRash55]

I replaced my battery today after 3 years and suddenly the UPS is no longer connected to AC. After I first replaced the battery I ran a self test and it passed. I then updated the battery change date in the Power Chute Software. After about a half hour I shut down the PC and walked away. Several hours later my net went dead and when I checked to see what was happening I noticed that the UPS was off. I turned it on and the On Line light flashed and then went out but the battery light stayed on.

I tried swapping to a different outlet and even putting the old battery back in but it refuses to connect to AC.

 

[CRash55]

I found the manual for the UPS and figured out the issue - I had narrowed the band on the voltage sensitivity too much and it caused it to kick over to battery. Evidently my voltage goes up at night