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Old 04-19-2013, 05:11 PM   #1
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Progressive Industries EMS / Transfer Switch issue

Hi Everyone - I have a '12 Winnebago Aspect 30c (30amp), and last year I installed a 30a Progressive Industries EMS. I installed it before the Transfer Switch, so it's only protecting my RV from shore power.

My issue is this - I've had about 6 times I can think of last summer when the AC was running on a hot day and the EMS shut the power off but wouldn't let the power come back on. It's hot in California today, and I have the AC running and it just happened again.

To get the power back on I have to run the generator. The transfer switch kicks over to the Generator, then when I shut it down it kicks back and all is well again.

I'm contacting Progressive about it, but I'm curious if anyone has had something similar happen?

Does this sound like a problem with the EMS, or a transfer switch problem?
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Old 04-19-2013, 05:22 PM   #2
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Have you checked the voltage at the shore power outlet? Your EMS may be protecting your system from low voltage.
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Old 04-19-2013, 05:30 PM   #3
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Quote:
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Have you checked the voltage at the shore power outlet? Your EMS may be protecting your system from low voltage.
Yes, and I'm pretty sure it's protecting me from a drop in voltage probably due to the park wiring. When I check the readout (with the RV power still off) though, it shows me 122 (today), and usually right around 120. Makes me think the power dipped - possibly because a bunch of other RVs had their AC kick on at the same time or something similar - and by the time I look at the reading everything is back to normal more or less.

The problem is, even when it's reading 122 volts, the power doesn't kick back on. I know power is getting to the EMS because the display is working. I suspect it's the Transfer Switch, but tough to say.

I figured I'd ask the forum because I'm expecting Progressive to blame it on the transfer switch and Winnebago to blame it on the EMS.
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Old 04-19-2013, 05:31 PM   #4
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Quote:
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Have you checked the voltage at the shore power outlet? Your EMS may be protecting your system from low voltage.
Exactly. That's why we have them. I know mine shut me down about 7 times last summer out West. It was 100 everyday for 35 days.
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Old 04-19-2013, 05:35 PM   #5
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The unit takes about 2 1/2 minutes to allow power back in after it shuts down. If your genny is starting up immediately the transfer switch may not switch you back. Totally a guess
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Old 04-19-2013, 05:41 PM   #6
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The unit takes about 2 1/2 minutes to allow power back in after it shuts down. If your genny is starting up immediately the transfer switch may not switch you back. Totally a guess
Hi Cliff - yes, I know it takes 2.5 minutes. I've sat and waited for 30 minutes + and got nothing. I even tried unplugging - replugging, taking a walk, etc.. The only thing that brings it back online is running the generator then turning it off. Weird, I know - but makes me think it's a transfer switch issue.

I'll see what progressive says.
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Old 04-19-2013, 05:43 PM   #7
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They are top notch and will set you straight IMO. Good luck and update us when you can.
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