Fanuc alarm SV0435: INV. LOW VOLT DC LINK
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
DC link voltage measured inside the servo amplifier fell below its threshold. Possible reasons range from genuinely low input AC voltage and loose input wiring, to a converter section failing to charge the DC link bus, to a blown DC link fuse in applicable models. Measure incoming line voltage and inspect charging circuit components before exchanging the amplifier.
Likely causes
- Low or single-phasing AC input supply
- Loose input terminal wiring
- Failed charging/precharge path in converter
- Amplifier internal rectifier/converter failure
Need the part urgently?
Send us alarm SV0435 with your machine details — typical RFQ turnaround is 24–48h.