Display shows ERR6 and the softener does not track water usage correctly

Safety: No plumbing work is required for configuration checks, but unplug the unit if removing the cover.

• Verify meter size: Enter the installer menu and confirm the meter size (e.g., 3/4", 1", 1.25") matches the physical meter installed on your US Water Systems softener.
• Check pulse setting: Ensure the pulses per gallon (or liter) setting matches the flow meter specification. Incorrect values will cause inaccurate usage tracking and may trigger ERR6.
• Update or reset firmware: If your controller supports firmware updates, follow US Water Systems instructions to update. Otherwise, perform a factory reset and reprogram all parameters.
• Replace control board if needed: If configuration is correct and ERR6 persists, the board may have a firmware or memory defect and should be replaced.