The Engine Monitor Printed Circuit Plug-in Modules is a generator-set controller. It is used on generator sets from Cummins/Onan, including the DYH 250 kW Series.
| Symptom | Cause | Remedy |
|---|---|---|
| Engine runs, shuts down and cranks for 75-seconds; cranking cycle stops; fault lamp lights | Fuel supply | Check fuel supply. |
| Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, overcrank light ON | Fuel supply | Check fuel supply. |
| Engine stops cranking and fault lamp lights, after cranking approximately 75 seconds | See engine service manual for troubleshooting fuel system; After correcting problem, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset, then back to the required running position. | |
| Fault lamp lights and engine shuts down after running for a period | Oil level (engine will shut down if sensor is closed) | Check oil level. |
| Fault lamp lights immediately after engine starts | Overspeed condition as engine starts | Check for overspeed condition as engine starts. |
| Fault lamp lights, no fault exists | To check a no-fault condition, disconnect leads from TB11 terminals 29, 30 and 31; If fault lamp lights with leads disconnected, replace engine monitor board; Reconnect leads. | |
| High engine temperature shutdown | Coolant level | Check coolant level; replenish if necessary. |
| Low oil pressure shutdown | Oil level | Check oil level; replenish if necessary. |
| Overcrank fault lamp lights and engine stops cranking after approximately 75-seconds | See engine service manual for troubleshooting fuel system; After correcting fault, reset engine monitor relay by placing Run-Stop/Reset-Remote switch to Stop/Reset position, depressing Reset button, then to the required running position. | |
| Overspeed shutdown | Governor and throttle linkages | Check governor and throttle linkages for fr[eedom of movement]. |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.