Fanuc alarm SV0403: CARD/SOFT MISMATCH
αi/βi Servo (SV0xxx) · Fanuc 0i-D
What it means
The combination of the axis control card and the servo software loaded in flash memory is incorrect. This appears after PCB swaps or software loads that don't match the installed hardware series. Fit the correct axis card or install the matching servo software edition, then power down and up again.
Likely causes
- Wrong axis control card fitted (replacement of different revision)
- Servo software in flash ROM does not match card/hardware series
Triage note: Resolved by hardware/software pairing, not repair.
Need the part urgently?
Send us alarm SV0403 with your machine details — typical RFQ turnaround is 24–48h.