Fanuc alarm SV0436: SOFT THERMAL (OVC)
0i-D servo alarm (load) · Fanuc 0i-D
What it means
Digital servo software OVC: calculated motor current exceeded thermal envelope for the allowed time
Likely causes
- mechanical drag (ways, ballscrew, chuck jam)
- vertical-axis brake not releasing
- undersized/worn motor
- OVC parameter thresholds wrong after amp swap
Triage note: Electronics rarely the cause - check load meter and servo guide current trace; motor replacement only after mechanical inspection clears
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- Request a quote →
A06B-2082-B105
AC Servo Motor (match model/suffix) · Check if others ruled out
Need the part urgently?
Send us alarm SV0436 with your machine details — typical RFQ turnaround is 24–48h.