E14 error and the unit indicates resin capacity calculation error or cannot determine remaining capacity.

Safety: No internal electrical work is required for parameter changes; keep the unit powered but do not open covers.

• Verify hardness: Test incoming water hardness with a reliable test kit. Enter the correct hardness value into the Hansgrohe control.
• Check resin volume setting: In the installer menu, confirm that the resin tank size and capacity match the installed tank (e.g., 10L, 20L). Adjust if incorrect.
• Confirm meter type: Ensure the correct flow meter size/type is selected in the configuration.
• Reset capacity: Perform a factory reset of capacity parameters if available, then re-enter all values.
• Monitor operation: After a full regeneration, monitor capacity countdown. If E14 returns, the control board may have a calculation fault and require replacement.