E07 error and the display shows incorrect time or date after power interruptions

Safety first: Unplug the unit before opening the control housing. Do not attempt board-level soldering unless you are qualified.

Step-by-step:

• Verify power stability: Ensure the softener is plugged into a stable, non-switched outlet. Consider using a surge protector.
• Reset time: Manually set the correct time and regeneration schedule. Observe whether the settings hold for at least 24 hours.
• Check for firmware reset: Some AquaUnique models allow a factory reset from the installer menu. Perform this only if you can re-enter all settings from the manual.

When to call a technician: Persistent E07 usually indicates a failing control board backup circuit. The entire control board should be replaced rather than attempting component-level repair.