Cause : Thermal sensor error on AI3 comes when the thermal monitoring function has detected an error of the thermal sensor connected to the analog input AI2.

"T3CF" fault in Schneider drive indicate "Thermal sensor error on AI3". This means a "short circuit" or "open circuit" condition on terminal AI3.

1. Verify the sensor and its wiring.
2. Replace the sensor.
3. Verify the setting of "AI3 Type" AI3T parameter.