Here is the solutions for your question:
1. Measuring whether there is real electricity, the generator replaces the voltmeter.
2. Put it into automatic or manual mode.
3. Check and correct according to the circuit diagram.
4. New generators or machines that have not been used for a long time appear easily. They can be charged by charging buttons on the control screen or by 12V batteries. The positive pole is connected to F1 and the negative pole is connected to F2. If the voltage can not be established, the positive and negative poles of the batteries can be changed and retried.
5. Cleaning is the surface of the ring. The end surface of the carbon brush is sanded so that it coincides with the arc on the surface of the collector ring more than 70% and the spring pressure is strengthened.
6. Clean carbon brush and carbon brush grip make carbon brush move freely.
7. Check the forward and reverse resistance of the diode with the multimeter, such as damage and replacement.
8. Use a multimeter to check if the forward and reverse resistances do not meet the requirements of diode characteristics. If the resistance value is infinite, the multimeter 1K for diesel generator sets should be turned on. Then use one Eurometer to check if the resistance value is zero, replace or handle the windings. If the resistance value is not stable, check whether the connection of the joint is loose.
https://www.dieselgeneratortech.com/generator-set
SOURCE: Runs great but will not produce electricity
To flash the excitor circuit on a coleman ( the generator is built by generac) you need a 12 volt battery. You quickly apply 12 volts via your 120vac recepticals. NO MORE THAN ONE OR TWO SECONDS! Then check you ac voltage. Most of the time the brushes are burnt up when voltage is low. Check the brushes first. You can access them by taking the end cap off of the generator via two to four screws. The brush holder is easy to spot, two wires leading to the front of the amature. Hope this solves your problem.
SOURCE: Generator stopped producing electricity
if the generator has been sitting for a while you might have to excite the magnets to start producing power. plug in a reversible drill and with the generator running turn the drill in the reverse direction by hand while holding the trigger in the forward position.
SOURCE: I have an older b&s generator, and yesterday
It possibly could be the Brushes in the generator just wore out and need to be replaced.
bigc
SOURCE: Porter Cable Generator does not produce electricity
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.
SOURCE: Wolf 800 generator. Engine will run but very electrical power is
is the engine running at the correct speed
3000 rpm to produce 50hz
3600 rpm to produce 60hz
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