For how long can you test the wing anti-ice system on the ground?

The wing anti-ice system on the A320 can be tested on the ground for a duration of 30 seconds. This limitation is in place to prevent potential overheating of the wing leading edges, which could occur if the system is left on for too long without airflow, as it is designed to operate effectively during flight when the aircraft is in motion. Testing it for this specified period allows for verification of system functionality while ensuring that the components remain safe from damage. Following this protocol is crucial for maintaining the aircraft's reliability and safety in icy conditions.