Try "swapping" the positions of the Main and Redundant IMs (if the system allows) to see if the error follows the module or stays with the slot. Perform a Brain Dead Reset
At its core, the code is an aggregate internal hardware alert. It acts as an umbrella error notification, signaling that the system's central brain (logic board) has encountered a failure it cannot bypass safely.
Improperly Seated Modules: A power module that has vibrated loose or was not fully pushed into the backplane.
Further reading / resources
Sometimes, this error is a false positive that can be resolved by updating the UPS firmware. Use the APC Firmware Upgrade Wizard to ensure your unit is running the latest version. When to Contact Support
If you want, I can:
To narrow down the root cause, check the liquid crystal display (LCD) or the event logs in your or PowerChute software for accompanying three-digit sub-codes, which frequently include:
: Subsystems like high inverter outputs, welded output relays, or distorted waveforms fail internal self-tests.
For deep-dive technical discussions, component-level troubleshooting, or to see how other system administrators solved this exact code, check out the Schneider Electric Community Forum. Important Safety Warning
: Ensure the Replacement Battery Cartridges (RBC) are properly seated and hold a sufficient charge. A deeply discharged battery can sometimes trigger system errors. Spiceworks Community Hardware and Support Links STR6KXLI System error 02000 - Spiceworks Community
Secure the Load: If the system is unstable, move the load to a secondary power source or bypass immediately.