Fanuc alarm SV0442
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
Converter: DC link precharge failure reported through CNC.
Likely causes
- Recharge current-limiting resistor defective
- Too many amplifier modules per PSM
- DC link short circuit downstream
Triage note: CNC-side view of PSM/PSMR alarm 05.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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PSM distributing/precharge board
Amplifier Control Board · Common cause
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A06B-6087-H115 / A06B-6120-Hxx
PSU Module (rating-dependent) · Common cause
Need the part urgently?
Send us alarm SV0442 with your machine details — typical RFQ turnaround is 24–48h.