What to do if Zehnder Rittling Fan displays AIRFLOW_EHA or AIRFLOW_SUP error?
- JJennifer RogersJul 30, 2025
If you're encountering AIRFLOW_EHA or AIRFLOW_SUP errors with your Zehnder Rittling Fan, try the following: * Ensure the valves and grilles are set correctly. * Inspect the air ducts as described in the “Maintenance of the air ducts” chapter. * Check all the filters and replace them according to the user manual. * Inspect the heat exchanger, pre-heater, and fans following their maintenance instructions. * Reconnect any loose hoses. * Run the complete commissioning wizard.