Fanuc alarm 8
αi SVM · Fanuc αi SVM
What it means
Inverter: DC link current alarm, L axis (first axis on multi-axis SVM).
Likely causes
- Short circuit between power lead phases or ground fault in power leads
- Short circuit between motor winding phases or winding-to-ground fault
- SVM inverter failure (IGBT shorted)
Triage note: B-65285EN 3.2.7 isolation: disconnect motor leads; alarm persists with leads off = SVM; alarm clears = megger leads then motor. Companion CNC alarms SV0600 detail 8.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6114-H2xx
Servo Amplifier Module αiSVM (rating-dependent) · Primary suspect
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Motor power lead set U/V/W/PE
Motor Power Cable · Common cause
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A06B-02xx/03xx-Bxxx
αiS/αiF Servo Motor (if megger fails) · Common cause
Need the part urgently?
Send us alarm 8 with your machine details — typical RFQ turnaround is 24–48h.