What to do if Danfoss VLT FC 103 power fuses open or circuit breaker trips?
- Wwendy44Aug 29, 2025
If the power fuses are open or the circuit breaker trips on your Danfoss DC Drives, it could be due to a phase-to-phase short. Eliminate any shorts detected. Another cause could be motor overload. Perform a startup test and verify the motor current is within specifications. If the motor current exceeds the nameplate full load current, the motor may need to run with a reduced load. Review the application specifications. Also, ensure all connections are tightened.














