All codesService call
SC851
Network I/F error
BController / HDD
Level B — stop, power-cycle may clear
First check
NIC failed. Reseat the network board, try another cable/port, then the NIC.
What it means
Network I/F error. Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- NIC failed. Reseat the network board, try another cable/port, then the NIC.
On-site steps
Parts to have on the truck
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.