The Engine Monitor is a generator-set controller. It is used on generator sets from Cummins/Onan, including the 50.0 DDB 15R.
Also fitted to: Cummins/Onan 200 DFP 17R (60 Hz), Cummins/Onan 230 DFP 17R (60 Hz), Cummins/Onan DFS 17R / 60Hz, Cummins/Onan DFS 517R / 50Hz.
| Symptom | Remedy |
|---|---|
| Engine runs, shuts down and cranks for 75-seconds. Cranking cycle stops; fault lamp lights. | Check fuel supply. |
| Engine runs, shuts down, cranks for 75-seconds, cranking cycle stops, overcrank light ON. | 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 - no fault condition exists. | Be certain that no fault condition exists. Disconnect lead 29, 30 and 31 from TB11 inside control box (refer to wiring diagram). If fault lamp still lights with leads disconnected, remove and replace engine monitor plug-in printed circuit board. |
| Fault lamp lights after engine is running. | Check the following: a. Oil level-engine will shutdown after approximately 12-1/2 seconds if low oil pressure sensor does not open. b. Oil pressure sensor may be defective. c. High engine temperature - caused by low coolant level, faulty thermostat, etc. d. Faulty high engine temperature sensor. e. Faulty starter disconnect. |
| Fault lamp lights and engine shuts down after running for a period. | Check the following: a. Oil level. Engine will shut down if sensor is closed. b. Check engine manual for troubleshooting oil system. c. High engine temperature. Check coolant level; check water flow |
| Fault lamp lights and engine stops cranking after approximately 75 seconds. | See engine service manual for troubleshooting fuel system. After correcting fault, reset monitor by moving run-stop/reset-remote switch to reset position, then to either run or remote to restart engine. |
| Fault lamp lights immediately after engine starts. | Check for: a. overspeed condition as engine starts. b. high temperature condition. c. faulty high engine temperature sensor or overspeed switch. d. faulty starter disconnect. |
| Fault lamp lights, no fault exists. | To check a no-fault condition, disconnect leads from T B l l terminals 29, 30 and 31. If fault lamp lights with leads disconnected, replace engine monitor board. Reconnect leads. |
| High engine temperature fault lamp lights - no fault condition exists. | Be certain that no fault condition exists. Remove lead 31 from TB11 inside control box (refer to wiring diagram). If high engine temperature lamp still lights, remove and replace engine monitor plug-in printed circuit board. |
| High engine temperature lamp lights after engine is running. | Check for: a. Defective thermostat/thermostats. b. Low coolant level. c. Defective high engine temperature sensor. |
| High engine temperature lamp lights as soon as engine starts. | Check for defective sensor or actual high temperature condition. |
| High engine temperature light ON, no shutdown | Disconnect wire at TB11-31. Light ON after relay reset. Replace engine monitor board. |
| High engine temperature shutdown | A. Check coolant level; replenish if necessary. b. For city water cooled sets, check water flow, valves, etc. c. Check sensor; check thermostat. d. Check radiator model, check fan belts, radiator for obstructions, etc. |
| High engine temperature shutdown. | A. Coolant level. Replenish if necessary. b. City water cooled sets. Check water flow, valves, etc. c. Check sensor; check thermostat. d. Radiator model, check fan belts, radiator for obstructions, etc. |
| Low oil pressure fault lamp lights - no fault condition exists. | Be certain that no fault condition exists. Disconnect lead 30 from TB11 inside control box (refer to wiring diagram), if low oil pressure lamp still lights, remove and replace engine monitor plug-in printed circuit board. |
| Low oil pressure lamp lights after engine is running. | Check: a. Oil level - engine will shut down after approximately 12-1/2 seconds if oil pressure is low. |
| Low oil pressure light ON, no shutdown | Disconnect wire at TB11-30. Light ON after relay reset. Replace engine monitor board. |
| Low oil pressure shutdown. | A. Oil level. Replenish if necessary. b. Sensor. Faulty sensor will shut down engine. c. Refer to engine service manual for troubleshooting guide for oil system. |
| Oil pressure shutdown | A. Check oil level; replenish if necessary. b. Check sensor; faulty sensor will shut down engine. c. Refer to engine service manual for troubleshooting guide for oil system. |
| Overcrank fault lamp lights after engine has run for approximately 75 seconds. | Replace start-disconnect circuit board. |
| Overcrank fault lamp lights and engine stops cranking after approximately 75 seconds. | See engine service manual for troubleshooting fuel system. After correcting fault, reset monitor by moving run-stop/reset-remote switch to reset position, then to either run or remote to restart engine. |
| 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. |
| Overcrank fault lamp, lights and engine stops cranking after approximately 75-sec'onds. | 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 lamp lights - no fault condition exists. | Replace overspeed circuit board. |
| Overspeed light on, no shutdown | Disconnect wire at TB11-29. Light on after reset; replace engine monitor board. |
| Overspeed shutdown | A. Check governor and throttle linkages for freedom of movement. b. Check overspeed switch. |
| Overspeed shutdown. | Check governor and throttle linkages for freedom of movement. Check overspeed switch. |
| When pressing test lamp button - one or more fault lamps do not light. | Fault lamp/lamps burned out - replace. |
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.