HR Neptune 2005

[aline]

we were connected to 110 power had AC running, we started the generator for a few minutes then shut it off. Now the Ac won't run on power, only on the generator. Any Info would be greatly appreciated

[pplwizard]

Your transfer switch relay is stuck

[G.G.]

Originally Posted by aline

we were connected to 110 power had AC running, we started the generator for a few minutes then shut it off. Now the Ac won't run on power, only on the generator. Any Info would be greatly appreciated

Happened to us, and it was the automatic transfer switch.

[Lault]

That is it, go out and hit it, it may switch back.

[aline]

Where is the transfer switch located???

[onechaddude]

On my 07 Neptune it's in the same compartment as the shore power cord. Black box about 8"x8" square and about 4-5" thick.

Chad

[JeepTJ5]

If you get your transfer switch to work again, I HIGHLY recommend that you DO NOT transfer under load. If you're on mains power and want to use the generator, turn off all the loads in the coach - especially the air conditioners - before you start the gene. Also, when you are about to disconnect from mains - or turn off the gene - turn all the loads off so they're not there when you reconnect. Your transfer switch will last much longer.

When the transfer switch transfers under load, the contacts arc and heat up, and may fuse - which is probably happened in your case. If you get it working again you may have shortened its life. It would be a good idea to open up the transfer switch (with no power of any kind connected) and burnish the relay contacts. You may want to have a professional do it if you have not done it before. Otherwise, the contacts may heat under load (because of the previous pitting) and fail or even catch fire. (less likely)

Good luck!