Weird Inverter Behavior

[Blackcabby]

So this will probably make sense to those with solid electrical fundamentals, and I am sincerely interested in learning from someone like you. Here’s what happened...

Picked my coach up from the shop where a new BlueOx setup was installed. In the course of conversation, the mechanic told me that my 12volt salesman switch didn’t shut anything off. He had turned off the inverter - probably wanting to keep the house batteries from needing to be plugged in. At any rate, I got back to storage, turned off the inverter, plugged in to trickle charge the batteries and left the unit. About two weeks later, I return and find the damn 110v GFCI plug had tripped and the house batteries were non-responsive. The Magnum remote indicated the following error; ‘No Inverter Comm’. After leaving everything plugged in to 110v for 24 hours, I came back and found the systems to be the same.

I tried some of what I found posted on this site. Specifically, I flipped the 12volt salesman switch - nothing happened. I disconnected and reconnected the communication cable and network cable - nothing happened. I attempted to manually turn on the inverter at the inverter itself. I went and did those same things again in different order with no change. I cycled the house batteries kill switch - nothing happened. Then I pushed the retraction button for the shore power cable - it worked, but nothing happened with the inverter. All of this time I have been plugged in to 110 shore power. Then I go in the coach, try to turn on a 12v kitchen light - nothing happened. Then while walking to the front of the coach, the whole darn thing came back to life.

I am pleased that the inverter is now back, the charging system is recharging the batteries, and things seem to be on the path to happy again. BUT I DON’T UNDERSTAND!!! Can somebody with a solid understanding of the Tiffin electrical design please help explain this to me?

[Props2]

Generally when things get weird, and you have some weird things going on, I would suspect a ground problem.Faulty,intermittent grounds cause many unexplained problems. I question why the mechanic installing your Blue Ox system would be concerned about shutting your house system down. If you had not had this problem before, I would start looking at where this dude was working and go from there.

[powerboatr]

x2 check grounds and neutral connections.
particularity on the magnum inverter itself behind the little panel where the 120 volts wires go in. the little terminal strips screws do come loose


you must kill all power, disconnect the batteries at the positive lead, unplug any 120 source to the coach, before you start checking connections.


magnum has a start up procedure after a cold iron reboot. download their manual, its more indepth than what came with the inverter.
also check all connections on your shore power cable and transfer switch .
we just went through a power event from hades and it all fell back on a loose neutral and stuck relay inside the magnum

[Blackcabby]

Thank you!