Kohler 10eozd Generator Under Voltage Code

[Rocketman]

Kohler 10eozd diesel gen set is setting under voltage code when first cranked and shutting down.
If I keep trying to crank, it will eventually (after maybe 5 or so times) run and operate fine.
Seems to be a bad (corroded) connection or something.
Any suggestions on where to look or what to look for would be appreciated.
The manual is not much help on this code other than call for service.

[bud37]

Heh there.....clean your positive and negative generator battery connections, also the generator ground strap if you have one. ensure the generator battery is full charged, then check the battery voltage with a DVM while cranking with the generator engine......that should tell you if the battery voltage is dropping too far during the load from cranking.....

It may simply be the battery is giving up......but checking before deciding is wise in this case.

[Rocketman]

The generator is cranking fine.
It is sensing an under voltage on the A/C output and shutting down after 10 seconds.
I don't think it is the battery since it cranks just fine. I will verify though.
Will check the grounding strap as well.

[tomschauer]

There is a good chance it is the capacitor. They are cheap and easy to change so I would start there.

[Rocketman]

Can you give me more info on the capacitor.
Where would it be located and any idea of a part number?

[km1125]

So it actually does START and then shut down? That wasn't clear in your first post. If that's the case, then I agree with Tom... probably a capacitor issue and it's getting weak and will eventually be too out-of-spec to produce any power.

[Rocketman]

Did some more work yesterday. After removing and reinserting all the connections on the controller it seems to be working fine. I am hoping it was just oxidation on the connections not allowing good contact for the sensors.
Will see.