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APC UPS Reset Procedure (After installing new battery)

🔄 How to Reset Your APC UPS

A complete reset—often called a "brain dead" procedure—can clear internal faults and restore your APC UPS to working condition.

  1. Unplug All Devices: Disconnect everything from the UPS outlets.
  2. Power Down: Turn off the UPS and unplug it from the wall.
  3. Disconnect the Battery:
    • Use the battery disconnect switch if present, or
    • Unplug the internal battery connector manually.
  4. Discharge: Hold the “On” button for 5 seconds to remove any residual charge.
  5. Reconnect Battery: Reattach the connector or flip the switch back on.
  6. Power Up: Plug the unit into the wall and turn it on.
  7. Test Output: Watch LED indicators and plug in a small device to confirm operation.

Still stuck? Check your user manual or contact APC support for further help.