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Computer Help and Support

Yonnie3

(18,160 posts)

9. I had some old APC UPSs that I guess automatically self tested daily.

Reply to RKP5637 (Original post)

Mon Feb 5, 2018, 08:08 PM

Feb 2018

It drove me crazy every night. I shut them down totally for 12 hours and the tests stated happening during the day. I couldn't find any info on turning that off.

They would also do this when the utility was going into a load management period. The utility lowers the line voltage at the start of that period. I confirmed this as I was in charge of that load management at he factory where I worked. My diesel generators were starting up at the same time. The late night beeps were not load management periods.

ETA: Mine are about 17 years old now

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Why would my UPS cycle on/off at about the same time each night? [View all] RKP5637 Feb 2018 OP

Can you do a self-test? DonaldsRump Feb 2018 #1

I've done the self-test and it always tests OK. It's always about the same time, 1:00 AM. It's RKP5637 Feb 2018 #3

Almost every UPS issue we've had that wasn't a blow up JDC Feb 2018 #4

LOL, Thanks!!! n/t RKP5637 Feb 2018 #8

How old is the unit and is there anything that increases the load on it nightly? JDC Feb 2018 #2

It's about 5 years old. The batteries were replaced about a year or so ago. It always passes RKP5637 Feb 2018 #6

Mine started doing that after a few years matt819 Feb 2018 #5

I think that will be my next step. n/t RKP5637 Feb 2018 #7

I had some old APC UPSs that I guess automatically self tested daily. Yonnie3 Feb 2018 #9

"... when the utility was going into a load management period." I think that might be what is RKP5637 Feb 2018 #10

I don't remember exactly, but the management signal would come around ten Yonnie3 Feb 2018 #11

I'm wondering if someplace there is some heavy load placed on the lines around 1AM? This is a RKP5637 Feb 2018 #12

Getting back to you per my post#12. RKP5637 Feb 2018 #13

I'm glad it was resolved. n/t Yonnie3 Feb 2018 #14