by pulling the battery connector (usually behind the front bezel).
The error message typically appears when using APC management software (like APC PowerChute Business Edition) or a Network Management Card (NMC). apc ups power system error 02000 link
Battery Disconnected (often follows error 02000 even if batteries are physically connected). Potential Causes by pulling the battery connector (usually behind the
: In some cases, the logic controlling the UPS can become scrambled. One technician resolved the same error simply by updating the UPS firmware, suggesting the issue was software-related. suggesting the issue was software-related.