ONAN GENSET CONTROL SERVICE MANUAL Pdf Download (2024)

FAQs

What do three flashes on an Onan generator mean? ›

• Three blinks indicates a service fault.

Onan Marquis Gold 5500 runs for 3 to 10 minutes then surges and dies. Code 36 means it shut down without being told to. Plenty of clean fuel, just changed fuel filter, pump primes, clean air filter, proper oil level.

Fault code 14 is a over frequency fault. This is caused by your generator running at a higher frequency than 60 Hz. I have a Kill A Watt meter that I plug into a 120 volt receptacle. One of it's readings is frequency.

The overload reset button is used in the case of sudden engine shutdown resulting from prolonged engine overload. Should the generator overload, AC power will be cut off, but the engine will stay running. Correct the overload condition and then press the overload reset switch on the front panel.

In this instance we find the primary cause of the issue causing Fault Code 45 - the speed sense fault - is an issue with the slip ring. Our technicians resolve the error by troubleshooting slip ring faults until we get the voltage to proper levels and get the Cummins 20kw RS20 or GSBB up and running.

Code 41 is Generator Rotor Fault. It means that the controller has detected a fault in the field circuit. Here is what I need you to do. Remove the controller from the genset, and unplug it.

Error Code 15 is an "UNDER FREQUENCY" alert. It means the generator is running slow (not running at full power).

We looked up code 12 in the manual which means overvoltage.

What is error code 12 on an Onan generator? ›

Code 12 is Over Voltage. It means that the generator is producing too much power. The first thing you need to do is to get a voltage and frequency reading to see where we stand. Connect a meter to the output leads of the genset, and try to start it.

If the generator does not see either one it will not run. Code 27 suggest that the generator is not seeing the correct AC voltage. Possibly either the ECU has gone bad or the Stator or a winding in the coils may have failed.

Field flashing is a common procedure used in cases where an alternator or generator has lost its magnetism and needs to be "kick-started" to begin producing power again.

What Does a Flashing Green Light Mean? That green light means your Generac is operating properly. If blinking, the green light may be indicating that your unit is running due to a utility power loss. Schedule maintenance if your unit displays a yellow or red light.