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JHSJMS · 08-12-2014, 11:05 AM

My MH has the Intellitec 50 amp Smart Energy Management System. All worked fine while on a trip a short time ago. Now, sitting in my driveway, I noticed that the EMS display panel was not lit up. I was plugged into a 20a breaker to maintain batteries. The MH also has a Zantrex Freedom 458 inverter.
I disconnected power and started the generator to see if I would get display. Again nothing on the EMS.
AC's do not work. I do here a click in the ceiling when I turn them on but they will not run, fan only will not run either.
At the Transfer Switch, I have 120v on each line for the Gen. I also see a green indicator light on a board that indicates operational.
At the breaker box I have 120v on each leg of the 50a breaker.
The AC relays located next to the breakers have 120v at each breaker location (CB 1-4). There is no power on the relay side of 1-4, even if I try to start the AC's.
Any advice on the next couple of troubleshooting steps would be appreciated.

Scooter · 08-12-2014, 03:38 PM

I did not see that you set your EMS aside and plugged into shore power direct. Is that possible..... or is your EMS hard wired?

Tha_Rooster · 08-12-2014, 04:51 PM

Are the AC's the only thing not working,do the outlets and microwave work?

JHSJMS · 08-12-2014, 06:19 PM

Not able to isolate the EMS. It is hard wired within the breaker box.
I will check all other 110 outlets and appliances.

LEMO · 08-13-2014, 08:07 AM

I had a similar problem. I disconnected from shore power and switched off the Battery Main and Battery Aux. After a while I switched on the batteries and reconnect shore power and the EMS system reset and has functioned correctly since.

Hope this helps, it worked for me.

JHSJMS · 08-14-2014, 12:56 PM

With a little more troubleshooting this is what I know.
All 110 items that are controlled by the EMS ( AC's, Water htr, Washer) do not work. All other 110 works.
Transfer switch appears to work fine. When plugged in I get 110 at power outlet and panel side. When running the generator I get 110 on the gen and panel side.

At the EMS breaker panel. I have 110 at each breaker and on the breaker side of the EMS relays.

On the circuit board, I am getting 12v at the power plug (J2). The 3amp fuse is fine.

I fear that my problem is the circuit board. The big buck item.

JHSJMS · 08-15-2014, 06:29 AM

I found the problem. The 12v plug on the EMS board was getting intermittent power. When I unplugged it to check voltage it was good but must be because I put strain on the wire.
The other end is plugged into a fuse board below the EMS panel. That plug was not secure.
After properly securing the plug the EMS is working normal.
I found this problem by luck. I just started wiggling all connectors and when I pushed on this one I heard the EMS relays kick in.