(if error persists)
Error 02000 indicates a communication loss between the UPS’s internal control logic and its power stage or battery management system. It’s not a user-input error but rather an internal firmware/hardware handshake failure. In many APC models (especially Smart-UPS), this error is accompanied by the UPS switching to battery or bypass mode or shutting down output. apc ups power system error 02000 link
Error 02000 is almost always a hardware communication break rather than a software bug. The "Link" portion of the error refers to the internal CAN bus or communication backplane that connects the "brains" of the unit to the "muscle" (power modules). Common causes include: (if error persists) Error 02000 indicates a communication
Occasionally, outdated firmware can trigger false "Power Sys Errors". Error 02000 is almost always a hardware communication
Battery Disconnected (often follows error 02000 even if batteries are physically connected). Potential Causes