Alarm 291 (or 341, 6) Recurring safety defr. — Repeated defrosting due to poor airflow

What does Recurring safety defr. 291 mean?

This alarm signals 10 repeated defrostings according to protection conditions, often caused by poor airflow or ice/snow accumulation.

• Poor airflow, e.g., because of leaves, snow, or ice.
• Defective circulation pump (charge pump).
• Large pressure drop in the heating system.

Click steps to track your progress.

1. 1

   Check the indoor module/control module display for specific action instructions.

2. 2

   Inspect the fan, grille, and/or fan cone on S2125 for any ice build-up or foreign objects, and remove them.

3. 3

   Activate 'fan de-icing' or 'continuous fan de-icing' in the indoor module/control module settings if the problem recurs.

4. 4

   Ensure the air flow across the evaporator is correct and not obstructed.