F30004Fault · Power unit (Motor Module)Usually repairable
SINAMICS S120 F30004: Power Unit Overtemperature Heat Sink AC Inverter
What F30004 means
The power unit's heat sink got hotter than its allowed limit.
Symptoms
Trips after the machine has run for a while, more often on hot days or in long heavy cycles.
Is it repairable?
Yes: fan replacement and temperature sensor repair are routine.
Common causes
- Failed or clogged cooling fan
- Dirty heat sink or blocked airflow
- Cabinet too hot
- Drive running near or above its rating
- Faulty temperature sensor
Safe checks
- 1Confirm the module fan is spinning
- 2Clean filters and fins
- 3Measure the cabinet temperature
- 4Compare the load current with the drive rating
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
- F30001Overcurrent
- F30002DC link voltage overvoltage
- F30003DC link voltage undervoltage
- F30005Overload I2t