Siemens alarm A30030: Power unit: Internal overtemperature alarm
SINAMICS S120 drive warning · SINAMICS S120
What it means
The interior temperature of the converter crossed the warning threshold - an early-warning stage ahead of fault F30036. Cooling performance is degrading or the load/ambient combination has drifted beyond design. Use the grace period to clean filters and verify fans before the drive shuts down itself.
Likely causes
- fan degradation or filter clogging
- ambient temperature creeping up (failed cabinet cooling)
- increased duty cycle/load since commissioning
Triage note: Warning clears once temperature falls 5 K below the limit.
Need the part urgently?
Send us alarm A30030 with your machine details — typical RFQ turnaround is 24–48h.