micromaster 440 fault f0002 comes when excessive intermediate circuit DC voltage due to high input voltage or It happens in regenerative mode.

1. Check mains for static or transient overvoltage.
2. Check brake chopper and resistor (if used).
3. Check deceleration time.
4. Use coast-to-stop function (if applicable).
5. Retrofit frequency converter with brake chopper and brake resistor.