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Eaton UPS cut off power with no reason

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Hello everyone

I encounter a strange issue with my Eaton 5P UPS.A few hour after a power loss (short or long no difference) the UPS decide to kill output with no apparent reason.
Little scheme explaining my test :


1. UPS plugged in main power and powering device ( battery 100%, load 30%)
2. Main power is cut, UPS switch to battery normally.
3. Main power return after 44 sec, UPS return to main power and charge this battery.
4. Few hours after that with no apparent reason ( main power, battery returned to 100%), UPS cut this outlet groups.

UPS is on latest firmware, connected by USB to ESXI server running windows server VM with IPP (usb passtrough). I also tested directly connection to Synology NAS running NUT internally with same result.

I have no network card with UPS for the moment (network-M2 card is on road)

I have disabled all auto...


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