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Guardian model #004722-0 liquid cooled generator. In manual or auto mode engine starts fine,then after about 15 seconds starter engages again while motor is running, then after about 10 sec. starter engages again,and this keeps repeating, something is not telling the circuit board that the engine is already running ? Is there a part that needs to be replaced ? Thanks, Mike

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Hi Mike,
Your particular model generator uses the output of the generator to decide if the engine is running or not. You need to look at wires S15 and S16 at the control board to see if you're getting 120VAC while the generator is running. A quick simple test is to just see if there is output at the power wires that go to the transfer switch from the generator. The thing you don't say that ought to be happening is that the control board should crank the engine 3 times with a 15 sec or so pause in between crank attempts, then it should shut down and light up the "fault" lamp and quit.
Bottom line is that if you're getting 240 VAC across the output at the breaker, you've probably got a bad controller or wiring to it broken, otherwise you've got some kind of excitation problem keeping you from making electricity.

Regards,
Carl

Posted on May 03, 2009

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