Forum Discussion

brianseay1's avatar
brianseay1
Explorer
May 16, 2020

50amp Smart EMS ???

Got the rv out for the first time this season and have already ran into a problem. I noticed my AC units would not come on after I got set up at the CG. Everything works except the AC units and water heater when on electric setting. Microwave works fine, all lights are working.The things that go thru the EMS are the only things not working. I have no lights coming on at all on the panel board.
I did the following things
1)checked the 50amp breaker at the shore power connection.
2) checked breakers in my breaker box, all seem fine
3) checked fuse in fuse box for the EMS, fuse was fine. indicator light comes on when you remover the fuse.So I assume everything is good there.
4) started generator up to see if it would work off of it, but nothing changed.
Is there something I am missing ? I'm thinking the EMS panel has gone bad. But I hate to buy a new one until I know for sure that's what it is. Is there anything I can check or have I checked it all ? Any help is greatly appreciated, it is mighty warm inside the coach without AC.....
  • Hey Doug just to follow up with you, I got my AC units working, so that saved the weekend getaway. Thanks for the help, and thank you to everyone that replied. The EMS control board went out. I bypassed it with the AC units and have them working now. Going to order a new board when I get home. Thanks again for the help.
  • Just a quick note, I ordered a new EMS board and installed it the other day. Everything is back up and running. Thanks for all of the help.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,188 PostsLatest Activity: Jan 18, 2025