Class A Power inverter issue. need help!

[RatandRed]

I have a 2006 Mandalay 40f diesel pusher. recently started receiving a Internal fault -1 error on my Magnum ME2012 power invert-er. when hooked up to shore power or running the generator even with the invertor turned off the fault would occur within 10 min and I lose all but battery powered items. It will still invert the 12vdc to 110vac after a reset but occasionally and inconsistently will fail and reset on and off. after doing some research I conclude that the error code is an Internal bridge fault and that my Main control board is failing and has taken the auto switch (AC board) out with it. I have ordered a whole new unit at a great price with warranty but need to get by until it arrives which could be a few days. can someone please help me with instruction on how I can Bypass the inverter to run off of the shore power hook up I have. my refer is residential and I have no way tho charge the batteries other then solar which cannot keep up when the panels are not able to get good sunlight.

Thanks.

[BCarp]

I would go buy yourself a 4 inch metal junction box and cover, and 2 nm cable clamps. then you just need 2 or 3 wire nuts.

Disconnect shore power, disable any auto generator start. Turn off the inverter.

Remove the inverter cover, label which cable is input and which is output (for reconnection later) Disconnect the wires, run them into the new junction box, tighten down the cable clamps and wire nut black to black, white to white, and twist the bare grounds together. You should then screw the ground wire to the junction box and close the cover.

Attached is the type of box I'm talking about. If you need to drive the coach anywhere before you get the new inverter, I'd screw it to the wall. The NM cable clamps will go into knockouts in the side of the box and key you secure the cables.Attachment 282966

[RatandRed]

Originally Posted by BCarp

I would go buy yourself a 4 inch metal junction box and cover, and 2 nm cable clamps. then you just need 2 or 3 wire nuts.

Disconnect shore power, disable any auto generator start. Turn off the inverter.

Remove the inverter cover, label which cable is input and which is output (for reconnection later) Disconnect the wires, run them into the new junction box, tighten down the cable clamps and wire nut black to black, white to white, and twist the bare grounds together. You should then screw the ground wire to the junction box and close the cover.

Attached is the type of box I'm talking about. If you need to drive the coach anywhere before you get the new inverter, I'd screw it to the wall. The NM cable clamps will go into knockouts in the side of the box and key you secure the cables.Attachment 282966

That is a little easier said then done. I am at an RV resort and I have a 50 plug in circuit box. with a breaker switch. so the only things I am able to actually access and modify for a bypass are on my own rig. but with what you stated, would I not be able to just take the input wires to the invert-er and the output wires from the invert-er and wire nut them together?

theoretically this would bypass the invert-er but also disable the battery charger portion which would be ok as I have an external battery charger I could utilize..

[twinboat]

In a little confused with your statement that you lose all of your 12 volt items when the inverter faults.

The 12 volt items come from the batteries not the inverter.

If your losing 12 volt items and the inverter is faulting, I would suggest that you have a battery cable or battery problem.

Maybe the inverter fuse, that they often tap off to supply house loads, has a bad connection.

Have you looked over the 12 volt battery connection areas?

[RatandRed]

Originally Posted by twinboat

In a little confused with your statement that you lose all of your 12 volt items when the inverter faults.

The 12 volt items come from the batteries not the inverter.

If your losing 12 volt items and the inverter is faulting, I would suggest that you have a battery cable or battery problem.

Maybe the inverter fuse, that they often tap off to supply house loads, has a bad connection.

Have you looked over the 12 volt battery connection areas?

You mis read my post - I lose all BUT the 12 volt

[twinboat]

Originally Posted by RatandRed

You mis read my post - I lose all BUT the 12 volt

Got it now.

[BCarp]

Originally Posted by RatandRed

That is a little easier said then done. I am at an RV resort and I have a 50 plug in circuit box. with a breaker switch. so the only things I am able to actually access and modify for a bypass are on my own rig. but with what you stated, would I not be able to just take the input wires to the invert-er and the output wires from the invert-er and wire nut them together?

theoretically this would bypass the invert-er but also disable the battery charger portion which would be ok as I have an external battery charger I could utilize..

Yes, I said to remove the wires from the inverter and run them into a junction box, just so the connection is protected. If you have enough room, you could just wire nut them inside the inverter.

This method would disable the charger on the inverter.

Or:

If the terminals on the inverter are large enough, you could connect both the input and output wires to the input terminals on the inverter instead of wire nuts.

This would allow the charger to still function.

[RatandRed]

Originally Posted by BCarp

Yes, I said to remove the wires from the inverter and run them into a junction box, just so the connection is protected. If you have enough room, you could just wire nut them inside the inverter.

This method would disable the charger on the inverter.

Or:

If the terminals on the inverter are large enough, you could connect both the input and output wires top the input terminals on the inverter instead of wire nuts.

Yes, Got it, so we are on the same page. and did that and I have power back. the inverter still faults &
will not charge but i have a separate charger i can plug in. thank you for confirming my hypothesis