Question about Generac Generator 15000 Watt 15kw
Has less than 150 hours although 11 years old. Motor runs great propane but shuts off every 15-18 seconds. Checked murphy switches oil & temp and they are fine. Notice generator is not putting out any current during run times. Unit is on my shop bench with outer case removed but still functional. Starts right up every time. We live rural on a ranch
You need to determine if it is a Brushed or Brushless generator and follow the tests on the link below. (You will locate the brushes on the end of the alternator in a 12o'clock position if they are fitted).
Then contact Generator Guru with the results and they will let you know what needs replacing. This is a free service.
Posted on Sep 25, 2015
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Posted on Jan 02, 2017
I install and work on these everyday. If you hooked up the transfer switch you probable have a control wire wrong. check the utility power sense wire. That lets it no when to start in auto. it could be a relay or fuses. or a control board.
Posted on Jul 09, 2009
Check the oil pressure switch
If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c
Posted on Aug 21, 2009
I have not seen yor generator in practice, but saw some pictures of it.
As it is an older model, but it is not rare for modern generators too, when they stay a lot of time (3 years is a good lot of time), they lose thier magnetism.
In order to build the magnetic field up again you can connect for a short time (1 - 3 seconds) by a working motor, a 12 V battery to the field terminals, + and - respected. A series diode 10 - 25A to battery can stop the built up field voltage to overcharge the battery.
Posted on Aug 01, 2010
Testimonial: "Thank you for the prompt reply - it seems to make sense and I'll try it."
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