Fanuc alarm L
αi SVM · Fanuc αi SVM
What it means
Inverter: FSSB fiber communication error on COP10A side - slave-direction link failure.
Likely causes
- COP10A optical fiber cable failure (farthest affected unit)
- SVM COP10A interface failure
- Downstream SVM failure
Triage note: Section 3.2.13: replace COP10A cable farthest from CNC first, then offending SVM. Dirty/bent fiber tips are a common non-part cause - clean before ordering.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- Request a quote →
COP10A FSSB optical fiber cable
FSSB Optical Fiber Cable · Primary suspect
- Request a quote →
A06B-6114-H2xx
Servo Amplifier Module αiSVM (unit farthest from CNC showing L) · Common cause
Need the part urgently?
Send us alarm L with your machine details — typical RFQ turnaround is 24–48h.