F30001Fault · Power unit (Motor Module)Usually repairable
SINAMICS S120 F30001: Power Unit Overcurrent
What F30001 means
The Motor Module's power stage measured current above its hardware limit and switched the output off to protect the IGBTs.
Symptoms
Trips the moment the axis is enabled or while accelerating; can also trip at random under heavy load.
Is it repairable?
Yes: power stage faults (IGBT, gate drive, current sensing) are a common repair.
Common causes
- Short or ground fault in the motor cable or motor winding
- Failed IGBT, gate driver or current sensor in the power unit
- Wrong motor data or over-aggressive current/speed controller settings
- Motor cable too long
Safe checks
- 1With power isolated and the DC link discharged, megger the motor and cable phase to ground
- 2Compare the winding resistance of all three phases
- 3If motor and cable test good, the power unit is the likely cause
Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.
Reviewed by AutomIQ repair technicians. Code and name from the SINAMICS S120/S150 List Manual.
Related SINAMICS S120 faults
- F07011Motor overtemperature
- F07900Motor blocked/speed controller at its limit
- F30002DC link voltage overvoltage
- F30003DC link voltage undervoltage
- F30004Overtemperature heat sink AC inverter
- F30005Overload I2t