Symmetra 160K Firmware Revision:560.0400.I

alkulify_apc · ‎2021-07-01

This was originally posted on APC forums on 12/22/2012

Our Symmetra 160K shows a few messages in the event log like this
Symmetra 160K Firmware Revision: 560.0400.I

12/22/2012 14:46:15 UPS: A power module fault no longer exists.
12/22/2012 14:46:09 UPS: Number of Power Modules increased.
12/22/2012 14:45:55 UPS: A power module fault exists.
12/22/2012 14:45:49 UPS: Number of Power Modules decreased.
12/22/2012 14:45:47 UPS: A power module fault no longer exists.
12/22/2012 14:45:07 UPS: An Internal communication bus fault no longer exists.
12/22/2012 14:44:59 UPS: The redundant intelligence module was inserted.
12/22/2012 14:44:11 UPS: The redundant intelligence module was removed.
12/22/2012 14:42:19 UPS: The main intelligence module is now in control.
12/22/2012 14:41:58 UPS: A power module fault exists.
12/22/2012 14:41:26 UPS: The main intelligence module was removed.
12/22/2012 14:41:25 UPS: The redundant intelligence module is in control.
12/22/2012 13:58:55 System: Detected an unauthorized user attempting to acces

TerryKennedy_apc · ‎2021-07-01

This was originally posted on APC forums on 12/27/2012

All but the last message probably indicate something is holding onto the I2C bus when it shouldn't, and interrupting communication between the various modules. Assuming you have a warranty / service contract on this unit, I'd suggest you open an official support request. I'm just another customer, but it seems that in most of these cases the helpful APC folks here in the forums will suggest that for this type of complex issue.

The problem is that these I2C bus faults are very sporadic, and it can be any module (and sometimes the chassis) that triggers them. The only thing you can do as a user without support is "diagnosis by replacement" - swap a spare part in, wait for the problem to happen / not happen again, and repeat as needed. Took me over a year once to find the bad SYPM2KU that was misbehaving. With support involvement they can probably do on-site troubleshooting (assuming your support includes that). It may also be the case that firmware updates (which could be to any of the modules, not just the intelligence modules) make the handling of this condition more robust.

See Answer In Context

TerryKennedy_apc · ‎2021-07-01

This was originally posted on APC forums on 12/27/2012

All but the last message probably indicate something is holding onto the I2C bus when it shouldn't, and interrupting communication between the various modules. Assuming you have a warranty / service contract on this unit, I'd suggest you open an official support request. I'm just another customer, but it seems that in most of these cases the helpful APC folks here in the forums will suggest that for this type of complex issue.

The problem is that these I2C bus faults are very sporadic, and it can be any module (and sometimes the chassis) that triggers them. The only thing you can do as a user without support is "diagnosis by replacement" - swap a spare part in, wait for the problem to happen / not happen again, and repeat as needed. Took me over a year once to find the bad SYPM2KU that was misbehaving. With support involvement they can probably do on-site troubleshooting (assuming your support includes that). It may also be the case that firmware updates (which could be to any of the modules, not just the intelligence modules) make the handling of this condition more robust.