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Old 05-10-2021, 05:30 PM   #1
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Seems to be my week, electrical issue

Got to Florida today and get hooked up and after 10 minutes or so of turning on the 3 AC units, I trip the main breaker at the post. Weird, but weird things happen. Turn the breaker back on and same thing. Something is obviously wrong.

I turn off the front AC unit and leave the other two on and no problems. Turn on the front with the Mid unit and breaker trips. Same thing with the front on and rear on. Turn off the front and leave the mid and rear on, again, all is good.

So, problem with the front AC unit I assume. Haven't been on the roof yet to take a look but wondered if this sounds familiar to anyone and what you might suggest I check. Appreciate any suggestions.
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Old 05-10-2021, 05:43 PM   #2
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First thing i would check is start capacitor on unit. That with a weak breaker could cause this problem.
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Old 05-10-2021, 05:53 PM   #3
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One would hope that the onboard EMS ( Energy Management System ) would shut down power to the front A/C before the post breaker tripped.
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Old 05-12-2021, 11:08 AM   #4
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I assume you have 50a. The pedestal breaker should hold. If not their breaker is bad. If you have an ems with amperage display you can verify the load...even though- all 3 a/c's are not on one leg of your panel. My guess is the campground.
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Old 05-12-2021, 01:27 PM   #5
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Quote:
Originally Posted by Skip426 View Post
One would hope that the onboard EMS ( Energy Management System ) would shut down power to the front A/C before the post breaker tripped.
The EMS doesn't load shed on 50 amp service, it only sheds if on 30 amp or less.

Its disabled on 50 amp and generator.
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Old 05-14-2021, 08:03 PM   #6
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Quote:
Originally Posted by puttin View Post
I assume you have 50a. The pedestal breaker should hold. If not their breaker is bad. If you have an ems with amperage display you can verify the load...even though- all 3 a/c's are not on one leg of your panel. My guess is the campground.
You are spot on and I really appreciate the help on this. As soon as I read your post it reminded me of a time 2 1/2 years ago when the same thing happened. Campground manager came down and instantly knew it was the breaker. It happened so quick and I was so new to the game I guess it didn't stick in the old brain.
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