Community Forums

markmiiler · 11-24-2017, 09:40 AM

We are having bad issues. Traveled for holidays and my inverter has acted up. The inverter will operate producing 120 using battery but the pass through will not allow shore current or generator power into half of my breaker panel into coach. I have reset and have done a hard restart with not success. The control panel is now blank but lite up. I plan on by passing inverter but do not have house batteries being charger. HELP

wE STILL HAVE 1000 miles to get home.

WorldCat25 · 12-05-2017, 06:55 PM

Sorry for your problems.
I have the MS series from Magnum and had a similar problem. I tripped the 20 amp 120v circuit. I think I figured out that that circuit is fed from the inverter. In my case, plugging in to shore power did not power the circuit. I called Magnum (excellent by the way). They told me there should be a 300amp fuse or circuit breaker close the batteries in the line supplying DC power to the inverter. I found this fuse and it was only a 200amp fuse. I replaced it (ordered on Amazon). This provided 12VDC to inverter. A soft reset corrected the problem.

I still do not understand how tripped a 20amp circuit blew the 200amp DC fuse to the inverter.

Check that out. Good luck.

Toribk · 12-05-2017, 08:18 PM

Markmiller,

Verifying you reset the 30 amp breaker on the side of the inverter?

Toribk · 12-05-2017, 08:28 PM

Also,

Try unplugging the remote at the inverter, wait about a minute and plug it back in.

See if the remote comes alive again.

markmiiler · 12-07-2017, 04:19 PM

Yes The unit has a white pop out breaker on the side of it. They have 3 different units 15 breaker and a 20 breaker and also the 30 amp which is what we have.

Toribk · 12-07-2017, 04:58 PM

Ok...verifying that breaker is Not tripped?

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Toribk · 12-07-2017, 04:59 PM

If it is Not tripped, check to see in your bath and kitchen area that you don't have a GFI outlet tripped.

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Kiawah · 12-11-2017, 07:30 PM

You have lost the 120v input to the inverter/charger. We know this, because:
- you report that shorepower is not recharging the house batteries
- shorepower is not passing thru (the magnum) internal transfer switch, and
- the inverter IS working, and powering the ouput inverter circuits
- I can send an electrical chart if you need, which depicts how these different functions work in the magnum.

There are a couple things you can do.

First, open the circuit breaker box, and with your voltmeter check that the breaker feeding the inverter has 120v on it. Rare, but you could have a bad breaker. Check also that the connections of both black and white wires are tight.

Next verify at the inverter, that you have 120v at its input. You've already reset the breaker on the magnum itself. If you have power at the magnum, and the control panel has both the inverter and charger turned on, then your magnum is likely defective.

Your risk is the house batteries going dead. With the engine running while driving, they would be getting charged. While sitting however, you'll need to buy a standalone charger. Get at least a 40-50 amp 12v charger, and connect to your house batteries. You can get a smaller amperage if have to since anything is better than nothing, but with the colder temperatures and furnaces running, you're going to need a larger charger. Your magnum probably has a 100 amp charger as part of it, if it were working.

I do want to review your terminology however, just to make sure no misunderstanding.
- when you say half if your breaker box isn't working, you are referring to the sub panel half (those circuits powered by the inverter), correct? You are NOT referring to loosing one of the two phases coming in from your transfer switch, correct? When on shorepower or generator, everything on BOTH 50 amp legs are working, except the inverter/charger and its downstream inverter fed circuits.