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It sounds like the AVR or automatic voltage regulator has gone bad which will cause you to have no voltage output. This is the first thing that I would look at or replace when having this issue.
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The AVR will be on the back end of the generator normally under a round metal cover that is held on with two screws near where the wiring comes out of the genset itself. As far as testing the AVR the only way to identify whether it is good or not is to basically check for voltage at the control panel where your plugs are.
Had the machine been sitting for a long time with no use?
Based on what you are describing then YES I would suggest AVR replacement. Anytime that you start or shutdown the generator you need to remove any load, turn off all outside items prior to shutting the generator off or trying to start the unit.
I would bet that when you started the unit with the AC and fridge on it created an instant load and damaged the AVR. This is the first thing that I would suggest to replace based on the information that you have provided.
You should always remove any external loads prior to shutting down or starting the generator.
No problem. I believe that everything will work just fine once you replace the AVR.
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