Fanuc alarm SV0437
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
Converter: input circuit overcurrent reported through CNC.
Likely causes
- IPM/IGBT input bridge failure in converter
- Input supply imbalance
- AC reactor mismatched to PSM spec
Triage note: CNC-side view of PSM alarm 01. Verify AC reactor specification before condemning the PSU.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6087-H115 / A06B-6110-Hxx
PSU Module (series + rating dependent) · Primary suspect
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IGBT/IPM input bridge per rating
IGBT Module · Check if others ruled out
Need the part urgently?
Send us alarm SV0437 with your machine details — typical RFQ turnaround is 24–48h.