One inverter won't charge from gen

[Jdaniel2509]

I have two magnum 2012 inverters on my coach. Had a couple of house batteries go bad so I replaced them all. My two remotes are stacked in a cabinet inside. Hooked to shore power, both inverters charge as usual. When I unplug and crank the generator the top remote does fine and bulk charges. The bottom remote stays on inverter with the green charge light flashing for around 10 seconds at a time. I think it is searching for power? Where do I start? Both work fine on shore power and I've reset both inverters underneath.
Thanks
Jimmy

[BFlinn181]

Here's the manual for your inverter/chargers.

http://www.allbatterysalesandservice...ers-Manual.pdf

Have you checked the breakers on the generator? It sounds like one might be tripped and not passing power on to the I/C. If the breaker has been reset, then you'll need to check the 120v input to the I/C. Also of course make sure all breakers or fuses on the I/C are not tripped or burned out.

[mel s]

Originally Posted by Jdaniel2509

I have two magnum 2012 inverters on my coach. Had a couple of house batteries go bad so I replaced them all. My two remotes are stacked in a cabinet inside. Hooked to shore power, both inverters charge as usual. When I unplug and crank the generator the top remote does fine and bulk charges. The bottom remote stays on inverter with the green charge light flashing for around 10 seconds at a time. I think it is searching for power? Where do I start? Both work fine on shore power and I've reset both inverters underneath.
Thanks
Jimmy

Jdaniel2509
If both inverters charge properly when on shore power, (and charged properly while running the generator), BEFORE you "replaced the house batteries" I suspect you wired something incorrectly when you replaced those batteries.Mel
'96 Safari

[Jdaniel2509]

I checked the breaker on the Onan. It had one 50 amp and I flipped it. I have double checked the batteries thinking the same thing Mel said. I'm guessing I will call Magnum tomorrow

[Jdaniel2509]

Is the transfer switch inside the two inverters?

[The Driver]

Originally Posted by Jdaniel2509

Is the transfer switch inside the two inverters?

No, it should be the first box your shore power cord goes into from the cord reel. Could be a real challenge to access behind your cord reel....

[BFlinn181]

Originally Posted by Jdaniel2509

I checked the breaker on the Onan. It had one 50 amp and I flipped it. I have double checked the batteries thinking the same thing Mel said. I'm guessing I will call Magnum tomorrow

What type and size generator do you have? Most all larger generators have two breakers.If your RV is a 50 amp shore power service, your generator must have to have two circuit breakers, each 180º out of phase to supply both legs of the electrical system. Also, while on generator, have you tried all air conditioners and both legs of your 50 amp service? Me thinks perhaps your inverter is giving a hint that all power isn't coming through. If no second breaker on the generator, check transfer switch to be sure it's delivering both legs of the 50 amp service.

[BFlinn181]

Originally Posted by Jdaniel2509

Is the transfer switch inside the two inverters?

There are 'mini-transfer' switches in the inverter because they provide 120 v A/C power when not connected to shore power or generator to some circuits in the RV.

[Jdaniel2509]

It's a 10 Onan. I only saw one 50 amp breaker on the front. I'll look tomorrow and see if I missed anything. And the ACs won't run but a minute on the generator because the bottom remote shows its trying to invert. While laying n my back in the bay I can hear a clicking inside the inverter every several seconds like it's trying to switch but isn't. The charge light on the bottom inverter will flash for 7-8 seconds as well then pause for a few, then start the blinking again.

[Jdaniel2509]

My bad. It's an Onan 12.5
In doing multiple resets today, 1 time I got both charging. 45
Minutes later I flipped on the ac and it shuttered and shut the ac off. Went to ac overload fault. I tried the rest of the day to get the resets to work with no luck. I called Magnum and I'm 22 in line!
Inverter just clicks every 10 seconds like it's trying to flip to charge but never does

[Jdaniel2509]

Fixed! There was a terminal block inside the genny cover that had 4 wires going in and 4 coming out. one has arched and basically burned into. Replaced the block and all is good. Thanks!

[The Driver]

Wow, good catch! Thanks for the report....