While camping, after a very bad storm, I had the Onan Marquis 7000 running with the rear A/C set on 'auto' and went to bed. During the night I heard the A/C compressor kicking on and off as the temperature would change. Around 4 in the morning I got up to use the boys room and noticed no power to the coach and the genset was still running. All the breakers, fuses, gfi's and the ATS switch have been checked out. I have no power at the junction box or at the main breakers. Before I go an spend a lot of time dropping it out of it's compartment and/or buying an expensive voltage regulator, can anyone think of something that I may have missed? Oh, and I have shot the rings with some contact cleaner already even thought they looked fine. The old gal has 403 hours on her.Thanks!

There should be breakers on the Genset as well. Did you check those?

Most generators have their very own circuit breaker located right on the generator. It will usually trip before any of the inside breakers.

The breakers were the first thing that I checked and they had not been tripped. I did reset them, reset the gfi and all of the other breakers in the coach. I also changed every fuse even though none appeared to be blown.

The generator has two breakers on it, one I believe is 20 amp and one 30 amp. It has a 5 amp slow blow fuse inside on the circuit board, one that pulls out of the front to the circuit board and a fuse that is the plastic horseshoe type on the side. I didn't see any others.

Have you checked the contactor's in the ATS to see if the one for the genny has dropped out.

Genset is producing no power | Good Sam Community

st687
Explorer
Aug 19, 2013
TicToRyde wrote:
Would something like the ATS switch fail in middle of the night when everything seems to be working fine? That's what is puzzling. One minute it's working the next I have nothing.

Yes,if the magnetic coil goes out the contactor opens.
TicToRyde
Explorer
Aug 19, 2013
Would something like the ATS switch fail in middle of the night when everything seems to be working fine? That's what is puzzling. One minute it's working the next I have nothing.
TicToRyde
Explorer
Aug 19, 2013
Not yet. To get to the ATS switch requires some major work to obtain access. I believe it defaults to the generator but am not sure. I know when I plug in the shoreline I hear it click and then the power comes on.
st687
Explorer
Aug 19, 2013
Have you checked the contactor's in the ATS to see if the one for the genny has dropped out.
TicToRyde
Explorer
Aug 19, 2013
The generator has two breakers on it, one I believe is 20 amp and one 30 amp. It has a 5 amp slow blow fuse inside on the circuit board, one that pulls out of the front to the circuit board and a fuse that is the plastic horseshoe type on the side. I didn't see any others.
TicToRyde
Explorer
Aug 19, 2013
The breakers were the first thing that I checked and they had not been tripped. I did reset them, reset the gfi and all of the other breakers in the coach. I also changed every fuse even though none appeared to be blown.
rgatijnet1
Explorer III
Aug 19, 2013
Most generators have their very own circuit breaker located right on the generator. It will usually trip before any of the inside breakers.
RCDave
Explorer
Aug 19, 2013
There should be breakers on the Genset as well. Did you check those?

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