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Forum Discussion

razvanp's avatar
razvanp
Aspirant
Aug 29, 2023

System: Error communicating with UPS 'UPS1' (Back-UPS NS 1500M2)

Hi,   I am getting the message System: Error communicating with UPS 'UPS1' (Back-UPS NS 1500M2) followed by System: Communication with UPS 'UPS1' (Back-UPS NS 1500M2) is OK dozens of times a day. A...
razvanp's avatar
razvanp
Aspirant
Aug 30, 2023

Thank you for following up. Yes, I did see it with 6.10.8. That is why I did upgrade to 6.10.9, but I still did see it happening.

 

StephenB's avatar
StephenB
Guru - Experienced User
Aug 30, 2023

This is with an APC UPS?  I am using an APC UPS with my RN526x, and am not seeing these errors.  The model is different though - the NAS lists it as "Back-UPS XS 1500M". 

 

I've seen something similar with a CyberPower UPS, but just ignored it.  The NAS still managed to do a clean shutdown when the battery in the UPS drained.  I didn't see any evidence of the NAS "stalling" in my case.  Perhaps try disconnecting the cable for a while, and confirm that the "stalling" is linked to the UPS connection.

 

You could try a different USB port on the NAS.  If you have other USB devices connected to it, you might also try disconnecting them, and see if that makes any difference.

  • razvanp's avatar
    razvanp
    Aspirant
    Aug 30, 2023

    Thank you. I will try and document the outcome. I will update the thread.

    • razvanp's avatar
      razvanp
      Aspirant
      Sep 05, 2023

      I have stopped Plex App (only one running) and I have stopped the generation of snapshots. I rebooted the NAS and for the past 5 days is up and running, without any UPS error message in the log. If in the next 5 days still OK, I will re-enable Plex and see.

       

      Thank you.

      • razvanp's avatar
        razvanp
        Aspirant
        Nov 23, 2023

        Sorry for not updating sooner. After a number of tests and running for weeks with or without Plex, I can say for sure the message is caused by Plex. It seems that every time a background job starts may actually trigger that message. Not sure how, but with Plex down I did not get the message for a month. Maybe the NAS is too old for the latest versions of Plex.

         

        Thank you all for support

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