Cause : IGBT overtemperature comes when estimated drive IGBT temperature is excessive. A 4210 fault code in your ABB ACS880 drive indicates an  IGBT overtemperature issue. IGBTs (Insulated-Gate Bipolar Transistors) are critical components within the drive that regulate power flow to the motor.

This fault code signifies that the estimated temperature of the IGBTs has exceeded safe operating limits.

1. Check ambient conditions.
2. Check air flow and fan operation.
3. Check heatsink fins for dust pick-up.
4. Check motor power against drive power.