Fanuc alarm A.
αi SVM · Fanuc αi SVM
What it means
Inverter: IPM alarm (N/H axis), including IPM overheat (OH) variant.
Likely causes
- IPM/IGBT failure (third-axis inverter stage)
- Power lead short / ground fault
- Motor winding short
- IPM overheat from duty/ambient
Triage note: CNC companions SV0449 detail A. and SV0603. On 2-axis units this code indicates SVM control-board failure - replace module.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6114-H3xx
Servo Amplifier Module αiSVM 3-axis (rating-dependent) · Primary suspect
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IPM power module per SVM rating
IGBT Module · Check if others ruled out
Need the part urgently?
Send us alarm A. with your machine details — typical RFQ turnaround is 24–48h.