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Old 10-01-2015, 05:16 PM   #1
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No power from inverter circuits

No power to anything that works through the inverter.
We've checked:

Breakers
GFCI outlets
Leg voltage

Everything works fine "except" what comes through the inverter

Any suggestions, it's a Magnum Elite
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Old 10-01-2015, 05:34 PM   #2
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Check two large 30-40A fuses.
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Old 10-01-2015, 05:41 PM   #3
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Quote:
Originally Posted by Flybob View Post
Check two large 30-40A fuses.
I don't know of any fuses that size, I have checked all the breakers and they are / appear to be ok....I have reset them
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Old 10-01-2015, 05:48 PM   #4
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It's a Magnum Energy
Model MS2000 inverter/charger

Should be a reset somewhere. ..just can't find it
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Old 10-01-2015, 07:46 PM   #5
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There will be a very large fuse between the battery bank and the inverter input. Should be anyway. That's how I would wire it. That will be on the 12V side of the thing.

It will look like this:

High Amperage Inverter Fuses & Breakers

I'm assuming a coach will have something like this. But this will only explain why the inverter isn't inverting. It will not explain why the bypass circuitry isn't working. There should be a breaker on your AC panel for the inverter. This breaker provides power to the inverter when you are connected to shore power and trips the bypass in the inverter to send 110V AC on through to the circuits connected to the inverter. On the other side of the inverter there will be breakers to the outlets that are provided inverted power.

So no inversion: large fuse on the AC side.
No power downstream of the inverter when plugged into shore power, breaker problem feeding the inverter, the inverter bypass (inside the inverter so nothing to be done about that) or the breakers on the output side of the inverter.

Pardon any ignorance of how large coaches are wired. I haven't seen any of those. Yet.
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Old 10-01-2015, 07:52 PM   #6
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Quote:
Originally Posted by Klipstr View Post
There will be a very large fuse between the battery bank and the inverter input. Should be anyway. That's how I would wire it. That will be on the 12V side of the thing.

It will look like this:

High Amperage Inverter Fuses & Breakers

I'm assuming a coach will have something like this. But this will only explain why the inverter isn't inverting. It will not explain why the bypass circuitry isn't working. There should be a breaker on your AC panel for the inverter. This breaker provides power to the inverter when you are connected to shore power and trips the bypass in the inverter to send 110V AC on through to the circuits connected to the inverter. On the other side of the inverter there will be breakers to the outlets that are provided inverted power.

So no inversion: large fuse on the AC side.
No power downstream of the inverter when plugged into shore power, breaker problem feeding the inverter, the inverter bypass (inside the inverter so nothing to be done about that) or the breakers on the output side of the inverter.

Pardon any ignorance of how large coaches are wired. I haven't seen any of those. Yet.
Thanks for the input, that's wayyyyyyyyyyy out of my league. I'll get on the phone tomorrow to a RV repair service.
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Old 10-01-2015, 08:07 PM   #7
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Originally Posted by CSMRetired View Post
Thanks for the input, that's wayyyyyyyyyyy out of my league. I'll get on the phone tomorrow to a RV repair service.
If you have an RV service person check the fuse, be sure to have them show you where it is and how to check it. It is not difficult and odds are that somewhere down the road it will need to be done again.
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Old 10-02-2015, 04:25 PM   #8
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Quote:
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Thanks for the input, that's wayyyyyyyyyyy out of my league. I'll get on the phone tomorrow to a RV repair service.
Based upon the wiring diagram in the Magnum user manual, it looks like this thing will neither charge the batteries for work as an inverter if the fuse on the main 12 volt line is blown or in case there may be a circuit breaker it would probably be a small inline circuit breaker about the size of an old Zippo lighter. That's the most likely spot for a problem. If your batteries are receiving a charge from the Magnum when plugged into shore power then it may not be a fuse in that power line, depending upon whether yours is wired like the recommendation in the Magnum user manual
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Old 10-10-2015, 10:05 AM   #9
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Wanted to update this.
It was a corroded connection at the lineout, found it by opening up the side panel. Apparently the wire nut was cracked and it had corroded and of course overheated. ....everything is in good order now.
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