Only trained and experienced persons with knowledge of fuels.
Onan generator service fault 3.
I have a onan emerald 3 generator with some problems and i talked to hank awhile back and would like to ask him some more questions.
Each cummins generator has a model spec number description which is shown on the serial number tag attached to the generator.
Press stop once to cause the two digit second level fault code to blink.
3 flashes a pause and then one flash tells you that your onan generator is going faster than 3 400 rpm.
Portable generator onan 2400 service manual 56 pages portable generator onan mobile genset operator s manual 32 pages.
The service code looks like 13.
Here is a representation of the tag on onan qg 4000.
What to do if my cummins onan generator blinks 3 times.
If field flash voltage seems pretty normal the regulator could be the source of problem which you could determine simply by running 12 volts through a diode to the regulator.
You need to get a secondary code from the generator.
Pressing stop again will stop the blinking the two digit code con.
Nearly all onan generators also meet the national park service sound level requirement.
This is an over voltage fault.
If that happens to be the case the onan generator starts then shuts down issue could be taken care of by replacing the unit control board.
Three blinks indicates a service fault.
That is 60 decibels of noise or less at a distance of fifty feet.
Fault shutdown the indicator light will repeatedly blink 2 3 or 4 blinks at a time.
When the light blinks three times in a row it is indicating a service shutdown.
The trick here is to make sure you do not confuse 13 with 31.
Note the highlighted letter code in this case p which denotes the specification type of the particular generator which can then be referred to as spec p.
It will be set if the controller sees 19v or more at the genset.
You can double check by pressing the stop button 3 times in 5 seconds.
Two blinks indicates a low oil pressure fault.
These rules may allow you to run your generator later at night in rv parks with noise limits too but you should know their rules rather than assuming you re already compliant.