Low dc power

[RBOC77]

We have a 2005 Monaco Diplomat M40PRQ and our coach has no house power. We believe it may be the Magnum inverter. I have checked the batteries, all good. I have checked fuses all good. I have checked the inverter and the light is steady green. Generator is on and the switch is on. The GFI outlet has no power. Ceiling lights are on. Any help would be appreciated.

[Thewellz]

It may be your automatic transfer switch. It should move to whatever incoming power source is connected. You mention the genny is on. When the coach is plugged to shore power is it the same? Ceiling lights would be 12v side.

[RBOC77]

Originally Posted by Thewellz

It may be your automatic transfer switch. It should move to whatever incoming power source is connected. You mention the genny is on. When the coach is plugged to shore power is it the same? Ceiling lights would be 12v side.

Yes it is the same as generator. I checked all the breakers and I am getting power.

[Dutch Star Don]

Your inverter has two push-in type circuit breakers on the side of it. They're about the size of a pencil tip. Open your bay door and you'll see the two CB's on one side of the Magnum inverter. See photo below....

[Dean n Mike]

I have had a similar issue. Check for 12DC power at the terminals of the inverter. There is likely a large Buss-type fuse between the battery bank and the inverter.

My inverter failed in such a way that there was an intermittent internal short in the inverter, and the fuse would blow when the short occurred.

The fuse on mine is bolted in its holder to the wall of the battery compartment. Fuse on mine is this one:

The bad news is that this was a costly repair, enough to make me consider just replacing the entire unit.