Fanuc alarm 30: Overcurrent in converter input circuit (PSM alarm mirrored)
αi SPM · Fanuc αi SPM
What it means
Displayed on the αi SPM this code means overcurrent flowed into the input of the main circuit of the common power supply (IPM detection on smaller PSMs). Check the PSM status display for the primary code.
Likely causes
- Input supply voltage imbalance
- AC reactor specification mismatched to PSM
- IGBT/IPM failure in the PSM input bridge
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6110-Hxxx / A06B-6120-Hxxx (PSM)
power-supply · Common cause
Need the part urgently?
Send us alarm 30 with your machine details — typical RFQ turnaround is 24–48h.