The Allis-Chalmers 2800 is a generator-set controller. It is used on generator sets from Cummins/Onan, including the DYJ Series.
| Symptom | Cause | Remedy |
|---|---|---|
| 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 | Oil level - engine will shut down after approximately 12-1/2 seconds if low oil pressure sensor does not open | Check oil level |
| Fault lamp lights and engine stops cranking after approximately 75 seconds | See engine service manual for troubleshooting fuel system, ignition system, etc.; After correcting problem, reset the engine monitor by moving run-stop/reset-remote switch to reset position; Release and return to run position | |
| Fault lamp lights immediately after engine starts | Overspeed condition as engine starts | Check for overspeed condition as engine starts |
| 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 | Defective thermostat/thermostats | Check thermostat/thermostats |
| High engine temperature lamp lights as soon as engine starts | Defective sensor or actual high temperature condition | Check for defective sensor or actual high temperature condition |
| 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 | Oil level - engine will shut down after approximately 12-1/2 seconds if oil pressure is low | Check oil level |
| 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, ignition system, etc.; After correcting fault, reset monitor by moving run-stop/reset-remote switch to reset position, then to either run or remote to restart engine | |
| Overspeed lamp lights - no fault condition exists | Replace overspeed circuit board | |
| When pressing test lamp button - one or more fault lamps do not light. Engine not running. | 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.