Dometic E7 Error

[ArtBro]

I have an 2019 Airstream Serenity 27FB with dual Acs. The rear AC is throwing an E7 error (loss of 120v). Front AC is working fine.

I tripped the breakers and reset the thermostat.

any suggestions would be great!

Art

[Arizona Bob]

Hi there,

I am experiencing the same issue. Did you ever figure out what the issue was?

Bob

Thanks
2017 27' Tommy Bahama

[capt_ron777]

Me too. Would love to know what the problem/ answer was.

[Foiled Again]

I only have 30 amp and 1 A/C, but every time I have gotten an E-7 it is simply because my main 30 amp fuse has popped. I cannot run the induction burner if the A/C is on and the water heater and refrigerator are on electric. Normally I remember to turn the water heater off before making morning coffee but get only about 5 seconds after hitting start on the burner to say, oh crud... and reset the alarm clock.

[peggy2ten]

Our E-7 code would not disappear with multiple resets of the thermostat--eventually determined cause bad power connection at the roof unit.

[wulfraat]

Assuming you are not at a campground with truly awful voltage <109v......

If resetting breakers and ccc2 unit do not correct the issue it’s very likely you have a an issue with a physical/mechanical connection either in the junction box in the ceiling (need to remove return registers to investigate - I believe there is a connection made below the intake) or at the main board outside in the AC itself (need to remove the shroud to access the main board)

Check those out quickly as a next step.

PS - also check the physical connection of the wiring at the breaker itself in your panel.

[pmclemore]

If you have a 50amp plug (which you certainly do if you have two ACs), it is possible that your campground pedestal may be dead on one leg.

Try using a 50-30 dogbone, plugging into the 30amp side, and then trying only the ac that hasn't been working. If it now works, then you know the problem is with the pedestal.

Pat