Failed defrosting 902 — Accessory is blocked: Defrosting conditions not met

What does 902 mean?

The defrosting stop conditions in the exhaust air module have not been met for 3 hours. Manual reset is required. Check ventilation flow and exhaust air temperature.

• Check the ventilation flow and the exhaust air temperature in the exhaust air module
• The defrosting’s stop condi- tions in the exhaust air module have not been met for 3 hours

Click steps to track your progress.

1. 1

   Perform a manual reset.

2. 2

   Check the ventilation flow rate in the exhaust air module.

3. 3

   Measure the exhaust air temperature.

4. 4

   Ensure the defrosting cycle can complete properly.