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Old 08-10-2022, 03:53 PM   #1
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ATS and Surge Protector Recommendations

I think I'm having problems with my Surge Guard 40250-RVC which is an ATS/surge protector combo. (At least, I hope that's the problem, since I would prefer that over a generator problem.) I'd like some specific recommendations, please, to replace the unit with a separate ATS and surge protector. I've heard good things about Progressive Industries for the surge protector, but I don't remember reading anything about the ATS.

Thanks,
Paul
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Old 08-10-2022, 04:11 PM   #2
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SurgeGuard makes a good transfer switch so that would still be a good replacement. Having a surge protector/EMS ahead of the transfer switch is good idea and can help protect the ATS. The PI units are great and the Hughes Power Watchdog is also a nice unit and has BlueTooth capability built in.
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Old 08-10-2022, 05:58 PM   #3
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Thanks, Lt. Dan! Do you have specific model numbers you would recommend? The Bluetooth sounds cool, but the PI warranty sounds even better.
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Old 08-10-2022, 06:42 PM   #4
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If you have a multiplex system that ties into the ATS, you will almost need the RVC model which has that capability. Not all transfer switches have that. On the PI, the HW50C is a hard wired unit that I've used in a couple of coaches. The Hughes is just called the Power Watchdog. One advantage to the Hughes is the surge module is user replaceable unlike the PI. Hughes makes both a portable and hard wired unit just like PI does.
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Old 08-10-2022, 07:21 PM   #5
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I'm not sure what you mean by "multiplex system". I have the Precision Circuits, Inc. Power Control System that's supposed to shed power as needed. I also have Magnum inverter. Do either of these require the RVC? I don't care if the remote power display won't work anymore, as long as I have a working ATS and some kind of power protection.

Also, maybe I should describe my original problem and see if you think it sounds like the ATS is the issue or if it's more likely a generator issue:

First, when on shore power, everything works completely fine. However, when running the generator, I'm having intermittent problems. Sometimes the generator will shut down when an air conditioner tries to start. Sometimes it won't. Sometimes the ATS is cutting the power to the coach, but the generator continues to run. On at least one occasion, I heard the ATS quickly switching on and off, back and forth, or whatever it's doing (chattering?). The other morning as a test, I started the generator, and I was able to turn on one air conditioner, then the other, then the water heater, then a hair drier, and the generator sounded fine for all of these; but when I added the microwave, the generator quickly ground to a halt as if I suddenly called for an extreme amount of power.

Considering the age of the unit and the description of the problem, someone suggested that it was more likely the ATS than the generator, and I liked that idea, since it seems easier and less expensive to replace the ATS than to get the generator diagnosed and fixed. But maybe that's off base. Would anyone care to take a shot?

Thanks,
Paul
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Old 08-10-2022, 09:52 PM   #6
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6500 watts with those loads plus loads you didn't see like the battery charger. No wonder it shut down.
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Old 08-11-2022, 12:47 AM   #7
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I think you have a generator problem.

If you overload it, the breaker should trip, not have the engine grind to a halt.
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Old 08-11-2022, 05:55 AM   #8
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6500 watts with those loads plus loads you didn't see like the battery charger. No wonder it shut down.
Ah! I didn't realize it was that much. That explains that, but it doesn't explain why I'm losing power with only one or two air conditioners running. That's mostly when I'm noticing the issues.

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Old 08-11-2022, 06:08 AM   #9
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Quote:
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I think you have a generator problem.

If you overload it, the breaker should trip, not have the engine grind to a halt.
Excellent point!

Because I was starting to notice problems, I recently changed generator spark plugs, air filter, fuel filter, oil and filter. Hearing that fuel pumps often fail, I bought a fuel pump, but I didn't replace it since the original seemed to be doing fine, for example, when priming. (I originally bought the replacement because it wasn't getting fuel, but that was because of a hole in the line, which is now repaired.) I suppose I could try the new fuel pump.

Also, I wonder if it's more of an air conditioner problem. At close to 10 years old, could it be that the capacitors are no longer up to snuff?

Thanks,
Paul
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Old 08-11-2022, 09:02 AM   #10
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Update:

Just had a mobile repair guy out. He adjusted the throttle on the generator which did seem to be one issue, but he also narrowed the problem down to a failing circuit breaker on the generator side of the transfer switch. Although I've read here that the SurgeGuard 40250 can't be "repaired," he seemed to think he could replace the breaker, if he could find one. Apparently he's having trouble getting them right now. He's checking some more, but if anyone has any suggestions as to how to get the appropriate breaker quickly, I'd sure appreciate it.

Another option might be to get a replacement ATS. I've seen some on Amazon that look like they could be here in a day or two, and I'm going to be at this campground for Sunday morning. (Today is Thursday.)

Thanks,
Paul
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