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I have a guardian generator #04456-3 12.000kw. during a recent…

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I have a guardian generator...
I have a guardian generator #04456-3 12.000kw. during a recent hot spell 95 degrees, the power went out. generator started fine and ran for approx. 20 minutes then stopped. all the lights were flashing.generator would restart then die out. this would keep happening. i assumed that the extreme heat was causing the high temp switch to kick out? i let the gen cool overnight and set the switch to manual the gen started then died out again any answers? natural gas, fuel good      
Submitted: 8 years ago.Category: Small Engine
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Answered in 17 hours by:
6/30/2010
Technician: Hank F., Technician replied 8 years ago
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 15,988
Experience: Certified on Onan and Generac generators
Verified

Hello,

It sounds like something has let loose in the electrical system.

 

Turn off the power supply to the genset.

 

Remove the control panel to access the circuit breakers.

 

Set a multimeter to VAC and connect the negative lead to a good ground. connect the positive lead to the back of one of the breakers.

Turn the set to 'Manual' and note how much voltage there is for the few seconds the set runs.

How much voltage do you measure?

 

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