Question about Electrical Supplies
Generator does not produce electricity
You need to determine if it is a Brushed or Brushless generator and follow the tests on the link below. (You will locate the brushes on the end of the alternator in a 12o'clock position if they are fitted).
Then contact Generator Guru with the results and they will let you know what needs replacing. This is a free service.
Posted on Sep 25, 2015
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Posted on Jan 02, 2017
Hi, remove the electric control panel & check the wiring as sometimes we have seen the wires coming off the voltage change over switches.
Also some of these units you can check the connections in the rear of the alternator & if it has brushes that they are not stuck.
Another problem we have had is the trip switches have went faulty but still switch operates ok, they need to be checked with a probe type tester for conductivety.
Posted on Nov 29, 2008
Check the following:
Exiting windings could have losts its 12volt exiting load. In that case it must be exited by 12 volt external battery
Another common problem is burned off wire or loose connection
Posted on Feb 11, 2009
Here are a a few possibilities to look at:
1) Bad connection at the outlets themselves (loose wire) regarding neutral, hot wires.
2) Bad Excitation Capacitor. The Exc. Cap. is responsible for energizing the field wiring of the alternator. If the field is not energized, there will not be a magnetic field developed, therefore, no electrical output.
3) Open Field / Stator winding. If Field winding is open, no magnetic field will be developed. If Stator winding is open, no voltage will be induced.
4) Generator speed is too slow. If the RPMs of the engine are too slow, the output of the alternator will fail as well. Note that from normal speed, voltage output will occur but at reducing frequency until ouput ceases altogether, usually at about 47Hz. If your alternator is a 2 pole, engine speed should be 3600 rpm nominal. If alternator is a 4 pole (most aren't), engine speed would need to be about 1800 rpm nominal.
5) Generator speed too fast. If RPMs are too fast, output may fail as well. See above.
6) Excitation Fuse has blown. There is sometimes a fuse in the excitation circuit. To check this, you will likely need to pull the end housing off the alternator. Pay attention to bearings / bushings.
Posted on Nov 27, 2009
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