Handset Alarm After Firmware Update

Problem description:
The Liberty rebreather head unit may display a persistent alarm following a firmware update. This issue is commonly caused by a firmware version mismatch across connected components (head unit, CUs, or handsets) or by a degraded or faulty battery.

Possible causes:

• Firmware version mismatch after an incomplete or partial update across components
• Battery degradation or failure

Step-by-step troubleshooting:

• Restart the head unit and check whether the alarm clears.
• Update all components (head, CUs, handsets) to the same latest firmware.
  • You can verify firmware versions during device startup or via the System Check menu screen.
• Fully charge your battery before proceeding further.
• If you see a "Configuration lost" alarm screen, verify and reconfigure your user settings. If this alarm recurs more than once, report an Issue via the Divesoft App.

When to contact service: If the alarm persists after fully charging the battery and confirming all components are on the same firmware version, report an Issue via the Divesoft App and attach all available dive logs and system logs.