The Cummins PCC1302 is a microprocessor‑based power‑command controller used on diesel generator sets for monitoring, metering and control of engine speed, voltage regulation, and protection functions. Common failure points in this class of equipment include damaged input/output traces or components (capacitors, resistors, ICs), burnt fuses or blown relays, and degraded solder joints due to thermal cycling. First‑check diagnostics: verify the 24 V DC supply to the board, inspect for visible damage or burn marks on the PCB, confirm that all connector pins are seated and free of corrosion, and review any error codes displayed on the HMI panel or logged in the controller’s memory.[oss-gpt-20b]