20 Most Recent Generac Guardian Series 5502 10 kW Emergency Power System 5502 Questions & Answers


Your generator is equipped with a battery trickle
charger that is active when your unit is set up for
automatic operation. The trickle charger is
designed to help extend the life of your battery by
maintaining the battery when the unit is
not running.
you will need to review which circuit bord controls this and have that board replaced or serviced some of these gen heads have this built in and it will be the rectifier in the gen it self it will be a black 1x1x3/8 inch with a mounting hole in the center and 4 lug post for the wires replace this and your issue should be solved but consult your dealer for witch unit you have as to a control board external or the built in rectifier hope this helps.

Generac Guardian... | Answered on Feb 27, 2011


Check the automatic voltage regulator .Or if you have a bad neutral connection one leg will be very high and one leg low causing damage to sensitive equiptment.

Generac Guardian... | Answered on Nov 08, 2010


My cousin has one of these models and the same thing happened to his. It was the natural gas regulator valve that went out. He could hear the clicking noise which is the spark ignitor trying to ignite the gas pilot light. After replacing the gas regulator the unit work fine as ever

Generac Guardian... | Answered on Nov 03, 2010


Unplug the oil sensor.
The oil sensor is located behind the oil filter. I unplugged the oil sensor and it fired right up. Plugged it back in and it runs fine.
It might be because it is cold.
I don't know why but I turned it off and it starts right up now.

Generac Guardian... | Answered on Dec 23, 2020


The charger might be bad and you should get a new charger

Generac Guardian... | Answered on Nov 28, 2020


Likely an extremely low or dead battery.

Generac Guardian... | Answered on Oct 15, 2020


there could be a couple of things wroung the breaker tripped have to reset the breaker the plug in went bad a wire came off or broke or the doid blew out you will need a meter to get in and check these out to see if any of these are bad most of the time it is a bad breaker that could be esily fixed or wire to the plug in either way they are pretty easy to fix.good luck

Generac Guardian... | Answered on Mar 18, 2015


Was oil filter changed as well ? This may result in low oil pressure shutdown until filter is filled with oil. Is there a sump oil level sensor that has stuck when oil was drained and now causing a no oil shutdown ? The battery indicator may not be real if the battery is ok.

Generac Guardian... | Answered on Dec 07, 2014


The problem with the repair service is another matter. Emergency generator and it's switch gear are there for emergency purposes. It has to be exercised periodically. The switch gear should have a toggle switch to simulate a power outage. the switch cuts power to the sensor sensing power from the utility company. This tells the switch gear that power was lost, start the engine and switch over to generator power. Run for a period where engine reached running temperature and switch back to stand by to shut down. Do this periodically, and be grateful the event was not a disaster. Think of your back up electrical system as the spare tire of your car and similar equipment and enjoy your investment. Good people brings you happiness, bad people brings you experience !.

Generac Guardian... | Answered on Nov 26, 2014


our Iveco generator 400 kva Shaw us fault code (spn 65579)

Generac Guardian... | Answered on Aug 06, 2014

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