Display shows “Err 10” and the unit regenerates at incorrect times or too frequently.

Safety first: No internal electrical work is required for this fault. You may leave the unit plugged in.

Steps to correct:

• 1. Verify time of day: Check that the displayed time matches actual time. Adjust for AM/PM if applicable so regeneration occurs at the intended off-peak hour.
• 2. Confirm hardness: Using your water test results or EcoWater dealer data, set the correct hardness (including iron compensation if required). Overstated hardness will cause too-frequent regenerations.
• 3. Check capacity and reserve: Ensure the programmed capacity matches the resin tank size and salt setting. If reserve is set too high, the unit may regenerate prematurely.
• 4. Review day override: If a day override is enabled, confirm it is appropriate for your usage. Increase the override days if the unit regenerates too often.
• 5. Save and monitor: Save all settings and monitor regeneration behavior over several days. Adjust as needed based on actual water usage.