Smart-UPS X 750 randomly shutting off outlet groups

[caseycrowe]

Hello,

I'm trying to troubleshoot a strange situation. I have a client with a handful of Smart-UPS X 750s in place across their campus. One in particular has decided to randomly start shutting off the Main and Outlet Group 1. In looking at the logs, there is no indication of a voltage or power issue. The other units switch to battery when power issues are detected, but those are all logged properly. The following is what I'm seeing (ignore the email messages, I hadn't updated the correct DNS server in there yesterday):

03/24/2023 11:22:11 Device UPS: The output power is now turned on.
03/24/2023 11:22:11 Device UPS: The power for switched outlet group 1, Outlet Group 1, is now turned on.
03/24/2023 11:22:11 Device UPS: The power for the main outlet group, UPS Outlets, is now turned on.
03/24/2023 11:22:06 Device UPS: The output power is turned off.
03/24/2023 11:22:06 Device UPS: Switched outlet group 1, Outlet Group 1, has been commanded to shutdown with on delay.
03/24/2023 11:22:06 Device UPS: The power for switched outlet group 1, Outlet Group 1, is now turned off.
03/24/2023 11:22:06 Device UPS: Main outlet group, UPS Outlets, has been commanded to shutdown with on delay.
03/24/2023 11:22:06 Device UPS: The power for the main outlet group, UPS Outlets, is now turned off.
03/24/2023 03:47:10 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:47:07 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:46:48 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:46:36 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:46:18 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:46:05 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:45:47 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:45:34 System Email: Could not resolve 'aspmx.l.google.com'.
03/24/2023 03:45:20 Device UPS: The output power is now turned on.
03/24/2023 03:45:20 Device UPS: The power for switched outlet group 1, Outlet Group 1, is now turned on.
03/24/2023 03:45:20 Device UPS: The power for the main outlet group, UPS Outlets, is now turned on.
03/24/2023 03:45:15 Device UPS: The output power is turned off.
03/24/2023 03:45:14 Device UPS: Switched outlet group 1, Outlet Group 1, has been commanded to shutdown with on delay.
03/24/2023 03:45:14 Device UPS: The power for switched outlet group 1, Outlet Group 1, is now turned off.
03/24/2023 03:45:14 Device UPS: Main outlet group, UPS Outlets, has been commanded to shutdown with on delay.
03/24/2023 03:45:14 Device UPS: The power for the main outlet group, UPS Outlets, is now turned off.

From the about page:

Model: Smart-UPS X 750
SKU: SMX750
Serial Number: AS1329115630
Firmware Revision: UPS 09.1 (ID20)
Manufacture Date: 07/20/2013

Apparent Power Rating: 750 VA
Real Power Rating: 600 W

Internal Battery SKU: APCRBC116
External Battery SKU: SMX48RMBP2U

Any suggestions? I'm kind of stumped here. Thank you!