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2018/03/03 17:24:51

Conaway2

Generac SE10000 Generator - low power output

One side of the 240V outlet seems to have no voltage. I reset breakers - no luck. This gets used 3-4 times a year. What should I consider replacing, as this unit is around 25 years old. Also, any idea where I can find parts for this generator ? I have had no luck so far finding parts.

10 comments Leave a comment

AVB

The parts look up is on Jack's Small Engines website for that Briggs/Generac generator.

https://www.jackssmalleng...-0-se10000-10-000-watt

2018/03/03 17:54:49

Roy

Check for a burnt smell around the control panel which would indicate a fried winding. Remove the control panel and check for a loose or corroded connection. If everything looks good use a multimeter to check for continuity across wires 11 and 22 and 11 and 44. A high or infinite reading will reveal an open winding which means replacing the stator.

2018/03/03 20:35:38

Conaway2

Thanks - got the parts list.

2018/03/04 19:10:04

Conaway2

Roy - no indication of corrosion or overheating. Continuity across the terminals you suggest is good - very low resistance. I have read that bad capacitors can cause the symptoms I’m seeing with this generator, however y multimeter does not measure capacitance. Are there other diagnostic measurements I can make ?

2018/03/04 19:14:13

Roy

That unit doesn't have capacitors, the output is controlled by an automatic voltage regulator which is working if one winding is producing power. You have a broken wire, corroded or loose connection or a failed receptacle.

2018/03/05 21:17:45

Conaway2

It does have 2 45uF capacitors and no voltage regulator or brushes. I had the capacitors tested today and they are fine. I measured the voltage again today at the 240 V sockets and measured 246 VAC. I have an electrician coming tomorrow morning....

2018/03/05 21:28:48

Kathy Bthomas

If you are looking for a generator to give you peace of mind in a power outage, this is not the one for you. First time running the Generac Generator, it had electrical problems, the wheels fell apart, air cleaner came apart and fuel guage did not work.

2018/03/06 04:39:18

Kathy Bthomas

I was without my brand new Generac Generator for 3 months! Save yourself a lot of headaches, don't buy a Generac generator.

2018/03/06 04:39:20

AVB

Roy
That unit doesn't have capacitors, the output is controlled by an automatic voltage regulator which is working if one winding is producing power. You have a broken wire, corroded or loose connection or a failed receptacle.

This particular does have a pair exciter capacitors. Also there is a pair of diodes/capacitors/varistors across the two field windings on the rotor. If either one the diodes/capacitors/varistors across one of the fields has failed the output will be be between 130 – 180V.

Now here the wiring diagram for the generator that show these components that I pulled from the Briggs Power Portal. It looks like the OP is dealing a Synchronous Alternator; although, it could still be an Asynchronous Alternator.

Conaway2
It does have 2 45uF capacitors and no voltage regulator or brushes. I had the capacitors tested today and they are fine. I measured the voltage again today at the 240 V sockets and measured 246 VAC. I have an electrician coming tomorrow morning....

With this info it sounds like you may just have loose connection or a fail circuit breaker causing your problem.

2018/03/07 02:46:13

AVB

Roy
That unit doesn't have capacitors, the output is controlled by an automatic voltage regulator which is working if one winding is producing power. You have a broken wire, corroded or loose connection or a failed receptacle.

Also this particular alternator has a self regulating setup using a capacitor; hence, no AVR. In this case there is pair of capacitors.

The capacitor is connected across the excitation winding. The current that flows through the capacitor produces a current in the rotor windings; this regulates the strength of the rotor magnetic field. It is the rotor magnetic field that generates the voltage in the power windings. The capacitor value is chosen to give the correct generator output voltage therefore it is important to always replace the capacitor with one of the same rating.

2018/03/07 07:39:52

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Generac SE10000 Generator - low power output

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