Inverter failure, Help

[Dennis Belfils]

Our Magnum MS2012 has completely failed. Tried soft & hard reset, but still totally dead. Was able to connect the 120vac to provide power to the 30amp inverter panel, but apparently the Automatic transfer switch talks to the inverter thru a network connection and the Aladdin ATS module, so now we can't get shore power. The only power available is thru the generator. Am I correct with my thought on the network and transfer switch? To make matters worse, there are no Magnum inverters to had.

[Fred Brooks]

    Dennis,
I am not clear on your statement " got 120 volts to the inverter panel" Please clarify. Do you have 120volts going to the input of the inverter/charger and "no 120volts" coming out? Fred

[Dennis Belfils]

The inverter gets its power from a 30amp breaker on the 50amp panel. From the inverter the 120vac goes to the 30amp panel. I disconnected the wires at the inverter and wire nutted them together. There are 3 data ports on the inverter. 1 for BTS, 1 for the remoter monitor & 1 for network. I can only assume where that goes as I have not found any info on it. I think it may have something to do with the Aladdin ATS module & therefore the ATS itself. Just not sure...

[Fred Brooks]

    Dennis,
Thanks. If you have by-passed the inverter/charger by connecting the input and output together, Then it sounds like the control pc board has failed internally. Keep in mind by doing this you have NO battery charger. You may want to put a stand alone shop charger on the house batteries. Fred

[Dennis Belfils]

Yes, the inverter is completely dead. My concern is if it talked to the transfer as we can't get the shore power contactor in it to work. The generator works fine, it's contactor pulls in. We are currently on our way to our summer rv park and I'm afraid I will have to bypass the transfer switch to use shore power till I can find/repair the inverter. I was hoping someone had an idea where and how the network communication works on the inverter....

[Scott Shearer]

Dennis,

The inverter does not interface with the transfer switch, the network data port at the inverter is for the for the Magnum Auto-Gen-Start (AGS).

Does your coach have an Aladdin ATS Interface Module (ATSM) or an AC Interface Module (ACI), 2006 MY should have an ATSM.

What is the make and model of your transfer switch?

Scott

[Dennis Belfils]

It has an ATS module

[Dennis Belfils]

Surge Guard ATS model 40250

[Scott Shearer]

Dennis,

If you coach has the original Surge Guard 40250 transfer switch, it is interface with the Aladdin ATSM for Aladdin data reporting only, does not control any functionality.

Do you not have ANY 120-vac in your coach when on shore power? Do the air conditioners work? What does your Aladdin Coach Electrical Status screen show?

Not a good idea to by-pass the transfer switch. I would remove the wire nuts at the inverter and double check the incoming voltage (from the main panel).

-Scott

[Dennis Belfils]

We have no shore power. The contactor (left one) in the ATS does not engage. The right contactor does on generator.

[Dennis Belfils]

I also show on the Aladdin display that only one leg of the 120 has any current thru it on generator

[Scott Shearer]

Before you by-passed it, did you happen to check the inverter operation, not pass-through but the actual INVERT function?

I believe that the Magnum MS2012 is a single-in/single-out inverter, if that is so, it only uses L1 to power the inverter itself (charger function) and to pass-through. If the incoming L1 is dead your inverter will only function in the ‘INVERT’ mode (no pass-through, no charger).

I think that your Surge Guard is suspect, have you checked all the terminals inside of it? I can attach an image of the internals if you don’t already have one.

[Fred Brooks]

    Dennis,
What is the voltage from the shore cord on the contactors inside the surge guard? red to white and black to white?

[Dennis Belfils]

228 vac across red/black

[Dennis Belfils]

Check the inverter a few times. Nothing on the remote display, no blinking green lite. Tried a hard and soft reset, nothing. Even if it didn't have 120 going to it, wouldn't I get a status lite or something in the display?