Disconnect switch trips shore breaker

[baustin]

National Seabreeze 1999. When I push the disconnect switch on the panel just inside the entry door to get 12V power back it trips my land breaker. Can anyone help me with some trouble shooting? It is like I'm going to ground somewhere.

[bigskymt]

What happens if you're running the generator and then turn on the 12volt?

[baustin]

Since this started, have been unable to start generator. It pulls the battery down very fast.

[baustin]

Also, what is the 1 Amp fuse on the Custom Products PDC board for, It is blown.

[bigskymt]

I'm unfamiliar with your power distribution center but it seems illogical something that blows a 1 amp fuse can blow a main breaker.
You can try turning everything possible off and turning every breaker in the pdc off then turning on the disconnect.
I'm not sure I understand your inability to start the generator, the starting circuit for it is dependant on a good 12volt source only.
What condition are your batteries in?

[baustin]

Thanks for the reply. Your right, the bats are for sure down. Maybe even bad. Today's plan is to directly charge the bats, then try to start the gen. If that works will try to bring the 12V up without land connection. Then have bats. tested and replaced if needed. I'll also replace the 1 Amp fuse. I bought the coach second hand and evidently the PDC has been changed out before, because my owner's man. is different than the board there now. The one there now is an RV customs products 12V PDC Rev. 4

[baustin]

Thanks to everybody for the help. Bats charged, gen started, turned off all in house breakers, then started to flip breakers on one at a time. All went well. Did the same with land power on 20 Amp breaker. All went well until got to front A/C, then pop!
A/C unit probably needs a stop/start capacitor, because rear will start without blowing when by itself, but front throws breaker when by itself. Still don;t know what purpose the 1 Amp fuse serves on the PDC, but corrected that also at same time, Finally found one at Fry's.
Now, the only unknown to solve is why my front power grar slide will not shut off when it reaches the fully closed position, just proceeds to shear pin if not really very careful.
Any input would be appreciated.

[Edw]

SeaBreeze