Fanuc alarm LVDC: Low DC link voltage alarm (LED legend)
βi SVU/SVM · Fanuc βi SVU/SVM
What it means
The 'LVDC' legend LED on the β SVU lights when the main-circuit DC link voltage falls below its threshold. Usually a supply-side problem rather than a failed servo unit.
Likely causes
- Incoming AC supply dip or low voltage
- Tripped input breaker / blown input fuse
- Rectifier or charge circuit failure inside SVU
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6093-Hxxx (SVU, only after supply checks pass)
amplifier · Check if others ruled out
Need the part urgently?
Send us alarm LVDC with your machine details — typical RFQ turnaround is 24–48h.