F30004: Inverter overtemperature fault in siemens drive

F30004: Inverter overtemperature fault in siemens drive indicates that the temperature of the power unit's heat sink has exceeded the allowable value. 

Cause: The ambient temperature is too high, the fan has failed, or the drive is overloaded.
Remedy: Check the fan for proper operation, ensure adequate cooling, and check the motor load.