Did you ever replace your ecc and did it make any difference? I have a similar unit, only with two ac units and one heater. I have a different problem though. Sometimes, neither ac compressor will come on. And if I try to turn on both ac units, neither compressor will come on. The the lights on the ecc blink back and forth (shedding). Looking for ideas to try because the local dealer wants me to leave the unit for 6 weeks and I can't do that right now. Thanks

If neither a/c will come on and the EMS says "shedding", that suggests there is some other major amp load that is causing it to shed both a/cs. Running the microwave or a hair dryer, for example. With a 30A supply, you can't have much else running and still operate a/cs. Remember that your fridge and water heater can be sucking quite a few amps and the converter/charger is drawing same too. If your other loads reach around 10-15A total, there won't be enough amps available to start even one a/c compressor and shedding will begin as soon as one tries to start.

When this happens, try putting your fridge and water heater in LP mode and see if it helps. And leave the microwave off.

Will try it this weekend. Thanks.

mxman132 -

I have not yet replaced the ECC, #2 son and I took a couple of months to tour Alaska by motorcycle (what a great trip...).

I experience the same shedding problem you describe, usually when first starting A/Cs on the generator. When I check around, I usually find that the electric hot water heater is switched on, turning it off free's up enough current to get the A/Cs working.

I have decided to take a more indepth approach to the 30A limitation on my coach. Originally I thought I would jump in with both feet and change the coach over to a 50A system, but our experience has been that a large number of campgrounds only have 30a service, so I decided this was not worth the trouble. What I have decided to do is to put in kind of a hybrid electrical system.

The installed 30a EMS seems to work well as long as things like the water heater, washer dryer, electric heaters, etc are not left energized. So what I have decided to do is to change the power inlet to a 50a cord which will terminate in a new distribution panel. From there one leg of the power will go to the existing EMS / breaker panel. The other leg feed a new breaker panel and will get the water heater, washer dryer, 3 new outlets for electric heat (I will also be installing the electric grid under the floor when I remove the carpet and replace the flooring), and electric heat for the basement. Since we like to use the coach year round we need to do something to supplement the propane heat. My thinking is that when we are camping in cold weather we will make sure that we get a site with 50a electric and will be able to use the elctric heat to supplement the gas heat. When we can only get 30a, the electric heat, electric water heater, and washer dryer will not be used.

As far as the original temperature control problem, I will also replace the ECC and remote sensors with new units, hopefully this will resolve the control problem.

Call Intellitec... I had a problem with my rear furnace. After it ran for a while it caused a relay in the ECM module (the black box in the bedroom area) to chatter. I took it to the dealer twice, they tried all kinds of things (supposedly) and failed to fix it. After a couple months I finally got fed up with the dealer and called Intellitec. They said I should replace the EMS unit. Since it was out of warranty I had to pay for it myself, cost me $135, but at least it fixed the problem.

My point is, it may be worth the gamble and the frustraction to just get another EMS and/or whatever else is in that particular system that might affect the problem.

Well, I tried turning everything off, put the fridge on gas, and still, sometimes the ac compressor will not engage with the generator running. And I can never get both ac units to run at the same time. When I first got the coach, it would run both. I guess I need to learn how this system works so I can diagnose it. If the ECC is not too expensive, I may try it first.

mxman132, Here's something to check,

I pulled the coach out of storage and was running the generator to exercise it and noticed that the AC compressors would not engage. The generator was not running very smooth (surging a lot) and I wrote that off to being in storage for a long time since last use and figured i would run it some more after I finished the maintenance. It was time for an oil change so I completed the oil and filter changes and started the generator from the local start button on the generator. With the generator running I noticed the fuel filter on the engine was leaking fuel, the body of the gas filter was loose and leaking. I replaced the filter and the generator smoothed right out. I went inside and put both ACs in auto cool and both compressors engaged almost immediately and the generator voltage (measured at one of the 110v outlets) was a constant 120v with both ACs cooling. After a while I shut the ACs off and shut down the generator. A couple of hours later I started the generator up and put both ACs in auto cool and they engaged within the prescribed 2 mins and cooled the coach right down.

I do not know how long the filter had been leaking but after replacing it the generator runs much better and the ACs engage and cool like they ought to. If you only experience this problem on the generator then maybe it is time for a fuel filter change. My coach actually has 2 fuel filters for the generator, one on the inlet to the low pressure pump (under the left front corner of the base) and one before it goes into the carb. It was the one at the carb that was leaking. (I thought this generator was fuel injected but it sure looks like a carbureator...)