robtlhughes
I have a 15 kw, liquid cooled Generac Guardian Generator, Model # 560047220A near-miss lightning bolt fried teh generator control board. I had the board rebuilt. I could then exercise the generator manually and it came on fine when the power was lost. But when I set it to exercise automatically once a week, it won't. If I push the exercise test button on the circuit board itself, the generator comes on, but doesn't turn itself off after 20-30 minutes.

So I bought a new circuit board. Same thing happens. Won't work automatically. And when I start it with the circuit board button, it runs until I turn it off. But, then, when I put it back in automatic operation, I comes on and stays on. The wiring looks fine. Any ideas? Thanks. Bob
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bronco
check the fuse's in the ATS should have 240 VAC between them. Replace if bad, if ok then check n1-n2 inside the CMA box to see it 240 is there. Please double check your model number I can't look it up. So I am not sure of the controls in your unit.
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Hotwire
rob,
Give us an update on your genset. What did you find so far?
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robtlhughes
Baffled by exercise problem

Hi, My model is (SG) 0047220. The board is a 076009A. I replaced the exercise switch and all the fuses are fine. No help: when I press the exercise button on the board; It runs but won't stop after 25 minutes. If I stop it manually and then put it in auto, it starts up again. To reset it, I have to not only disconnect the battery but also disconnect both wiring harnesses to the board. Once I get it back together, all is well--except for the exercise cyle. I have the wiring diagram, but an baffled.
Bob
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douglas123
Does your transfer switch have T1 and T2 fuses?. If so check them. There is a proper installation procedure for installing a new control board. Should have come with new board. Three pages. There is also troubleshooting guide for this board on the same pages. If you do not have this I can send it to you.
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