IBM RS/6000 - Manual (Page 217)

Table 36 (Page 5 of 5). Firmware Checkpoint Three-Digit Codes
Code Description
FFA Error during flash update
FFC Operating System boot - No errors reported by IPL ROS
FFD Operating System boot - Non-critical errors reported by IPL ROS
FFE No boot - Critical error(s) reported by IPL ROS or "F1" key pressed
Appendix A. Firmware Checkpoint Three-Digit Codes 193