Back-UPS XS 1500 - No AC after battery change

[Crash55_apc]

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 shut down the PC and walked away.  Several hours later my net went dead and when I checked ot 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_apc · Accepted solution]

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

[BillP]

Sometimes at night when power demand is lower, utility voltage can creep up and cause this, but I'm glad you figured out the issue. 

Thanks,

Shanon

[Crash55_apc]

The waveform must not be very uniform either as the Power chute Software never reported a voltage above 124 but setting the overvoltage at 128 it still tripped.

I thought about it though and realized that just about everything these days is auto switching between 120 and 240 so I am not sure if overvolatge really matter