I have an APC Back-UPS BX950MI

 

Yesterday it was able to talk to my unraid server just fine, today it says: 'Lost communication'

How do I troubleshoot what is going wrong?

I have rebooted the server already and reconnected the USB cable going from the UPS to the server multiple times.

I am at a loss, so thanks in advance for any help!

Try switching to a USB 2.0 port and wouldn't hurt to try another cable.  Stop and restart the UPS daemon in settings and see if it pick back up.  Some people also have better luck with the NUT plugin.

Thanks for your response, I have checked the following things:

- Connect the USB cable to a USB2.0 port

- Restarted the UPS daemon (& Unraid)

- Installed the NUT plugin

 

No luck so far, unfortunately.

I have left the NUT plugin in its default configuration, is there something I should change?

 

Also I was wondering; is it possible that my USB ports enter some form of suspended state?

 

When I connect the UPS to my Windows laptop, the Powerchute software recpgnizes the UPS just fine.

I also lost mine in the dashboard recently, but it's showing as a USB device.

 

 

 

Bumping, does anyone have more troubleshooting suggestions?

Might just be broken. I had one that quit connecting and I had to replace.

Restarting restored the proper functionality 🤷‍♂️

 

But after a day or so it stopped again, was able to repeat this behavior 2x

 

Edited February 17, 20242 yr by whitephoenix117

So I have an interesting diagnostic update.

 

Home assistant is still collecting data from the APC UPS daemon, but the card on Unraid is broken. Meaning, Unaird is still communicating with the UPS.