All codes
Service call
SC823
Self-diagnostic error (extended)
BController / HDD
Level B — stop, power-cycle may clear
First check
Self-diag named a board. Read the subcode in SP5-990 before you replace a controller.
What it means
Self-diagnostic error (extended). Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- Self-diag named a board. Read the subcode in SP5-990 before you replace a controller.
On-site steps
Parts to have on the truck
- Controller
Related codes
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.