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Old 11-23-2021, 01:54 PM   #1
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Help! I have an electrical issue that has me scratching my head??

We have a 2009 Monaco Camelot 42 DSQ ISL 425 Cummins. Got a funny electrical problem?? No matter what I use for a power source, 15 amp house supply, generator or 30 amp or 50 amp shore power I cannot run even one 1500 watt heater in the coach, even at half power it will trip the 30 amp breaker in the inverter? I have a Magnum MS 2000 inverter and a IOTA Energy transfer switch. I have gone into both the inverter and transfer switch and made sure all connections are tight and still have the problem? But I can run all three A/C units for as long as I want. Something is just not right here? Our old coach a 2004 Gulfstream had no problem running 2 heaters full blast on 2 different circuits of course. But if my wife turned on the coffee maker it would trip the breaker. Plus the amp reading in the power distribution panel quit showing amp draw. I have also turned off my main power switches, unplugged the CAT 5 connectors into the inverter and plugged them back in. Nothing helps? Is this just the way it works? It's just like everything is running through the inverter and not the transfer switch? Please help!!
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Old 11-23-2021, 03:18 PM   #2
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First thing you need to do is get rid of the IOTA Energy transfer switch this is a known problem to cause fires. It was actually under recall during the Monaco bankruptcy so most didn't get replaced.



Other then that I would check all the connections in the inverter, main service panel, and subpanel.


The breaker on the inverter may be weak, if you have to replace anything I'd start there.



I redid one of my none inverter circuits and put an outlet in the bedroom so I could run a small heater from it and not off the inverter.
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Old 11-23-2021, 03:25 PM   #3
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Your 2k inverter has a 30 amp pass thru. Verify that all your AC draws on the inverter circuits are less than 30 amps, including that heater. Your AC units are obviously not on the inverter circuit, so, that doesn't matter. If all amp draws in the inverter circuit are significantly less than 30 amps, then you likely have a defective CB in the inverter.
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Old 11-23-2021, 03:34 PM   #4
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Quote:
Originally Posted by jacwjames View Post
First thing you need to do is get rid of the IOTA Energy transfer switch this is a known problem to cause fires. It was actually under recall during the Monaco bankruptcy so most didn't get replaced.



Other then that I would check all the connections in the inverter, main service panel, and subpanel.


The breaker on the inverter may be weak, if you have to replace anything I'd start there.



I redid one of my none inverter circuits and put an outlet in the bedroom so I could run a small heater from it and not off the inverter.
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Old 11-23-2021, 06:24 PM   #5
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Well that's not what I wanted to hear. I've done all the testing and tightening, (I am a certified mechanic by the way) and it sounds like this is the way my coach was built to begin with. Not a very good design in my opinion.
But it looks like I will need to get a new transfer switch. In all the knowledgeable minds on this forum, what is the best brand of transfer switch you would all recommend?

Thank you all so much for all of your help,
mdpuff.
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Old 11-23-2021, 06:36 PM   #6
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There were few MHs that ran the engine block heater thru the inverter.

Find yours, unplug it, and see what happens.
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Old 11-23-2021, 06:42 PM   #7
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Those push button CBs are pretty generic part I wouldn't but cheapest I find . you may find #s on it.
I have Lyght / Elkhart ATS seems to be good Esco is same but they charge up to double . Progressive Dynamics ATS gets praise.
The amp meter may be off, if a certain breaker is turned of in CB panel. They double tap a random breaker on both sides of CB panel and use for amps and volts come up kind of often.
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Old 11-23-2021, 07:47 PM   #8
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To reply to twin boat, I have flipped the breaker off for my block heater. Plus I know that the block heater is good, when I plugged it into 15 amp house shore power in sub freezing temp's the engine started right away without the glow plugs having to work so the engine was nice and warm to start it. So I have ruled out a block heater problem.

Thanks for your input, keep it coming folks, lots of good info here.
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Old 11-23-2021, 07:54 PM   #9
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If the space heater is the only appliance you have plugged into an outlet, it sure sounds like the inverter breaker is weak !
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Old 11-23-2021, 08:30 PM   #10
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Another question about my transfer switch. Looking inside my old IOTA Engineering switch it has very large, looks like #6 or larger wire coming in. The ones I've looked at online look like they only fit # 10 wire and are rated at 50 amps? What am I missing here??
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Old 11-23-2021, 09:59 PM   #11
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I replaced the factory IOTA switch with a Lyght LPT50BRD.

No issues with fitting the wires.
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Old 11-24-2021, 12:14 AM   #12
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Ok, after getting the batteries all charged up and turning off the block heater I can get one heater to work fine. Plug in 2 and after a while it will pop the breaker. 2 1500 watt heaters is just too much for one 30 amp breaker, no matter what it is. I guess that's just the nature of the beast. Just need to find a good transfer switch now.
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Old 11-24-2021, 05:19 AM   #13
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Quote:
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Another question about my transfer switch. Looking inside my old IOTA Engineering switch it has very large, looks like #6 or larger wire coming in. The ones I've looked at online look like they only fit # 10 wire and are rated at 50 amps? What am I missing here??

I noticed the same thing when working on my Esco ES50M-65N. Both incoming and outgoing wires seemed like #6 or bigger and some of those newer ones won't accept that wire size.
I ended up replacing just one contactor.
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Old 11-24-2021, 05:33 AM   #14
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A 30-amp outlet supplies 3,600 watts (30 amps multiplied by 120 volts). Therefore, the breaker on that outlet could meet code and still trip anywhere between a total load of 2,880 watts (80 percent of 3,600 watts) and 4,320 watts (120 percent of 3,600 watts).
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