Purpose:
If you update your UPS to FW 15.0 or later and you have an SBU (Service Bypass Unit) connected, you may see an Unknown UPS internal error (1568-00B0) or Unknown UPS internal error (156A-00B0) alarm.
Product Line:
Smart UPS Modular Ultra
Environment:
All models, all serial numbers on UPS Firmware 15.0 or later with an SBU (Service Bypass Unit) connected.
Resolution:
UPS Firmware 15.0 and greater supports new events for the SBU switch positions. In order to see the correct alarm messaging on the display and NMC, please upgrade the NMC/Display to the latest firmware. See below for FAQs on the different ways to upgrade that firmware.
How to Install the Smart-UPS Modular Ultra NMC/Display Firmware using the USB Port
Web link - https://www.apc.com/us/en/faqs/FAQ000261841/
How do I update my Smart-UPS firmware using the web interface of my Network Management Card?
Web Link - https://www.se.com/ca/en/faqs/FA170679/
