Here's a quote from Understanding Your RV's "SHOREPOWER" :
? "This system is designed to prevent ?tripping? the circuit breaker at the pedestal/post if the RV user inadvertently turns on too much electrical equipment ? meaning the total amp draw will be greater than the rated level of the post?s circuit breaker.
The Intellitec 50 Amp Smart EMS? recognizes when electrical power is being supplied to the RV. Through its diagnostic programming, it can determine if the incoming power is 50 Amp power, 30 Amp power, or Generator power. If the incoming power is from a 20 Amp source, the RV user must identify this lower power level by pressing the ?30/20 Amp Select? switch on the display panel. The system cannot discern the difference between 30 Amp and 20 Amp power!
When functioning at 30 Amp (or lower) power, the system controls the ?On/Off? operation for a maximum of six electrical loads. These loads are typically ?heavy? loads (high amp draw) and their cumulative amp draw will trip the post?s breaker. Typical loads (in the order of lowest to highest priority) are the Electric Element in the Water Heater, the Rear Air Conditioner, possibly a Washer/ Dryer, and the Front Air Conditioner. (Other appliances may be attached to the system in larger RVs. However, the Microwave is controlled by the Inverter, if you have one.)
The system is also programmed with the ability to ?memorize? the amp draw of each electrical load (appliance) attached to it. The system "memorizes" and stores the amp draw for each controlled load only when it is 'shed' (turned off by the system). It subtracts the new total amp draw of the RV from the original total amp draw - the difference is the amp draw of the shed load.
The system continuously monitors the total amp draw. If it gets too high, the lowest priority appliance will be shed (turned off). If the amp draw continues to be too high (or goes higher), the next lowest priority load(s) will be shed until the total amp draw is below the power limit of 30 or 20 Amps. This means that, no matter what order you turn appliances on, the Water Heater will always be shed first, then the Rear Air Conditioner, etc. The Front Air Conditioner is the last load to be shed. This is all done in the interest of protecting the RV from excessive amp draw.
When a load is shed, the appropriate ?Power Status? light on the display panel may blink for the first two minutes. This indicates a time delay to protect an air conditioner?s compressor. Once the time delay is completed, and there is enough power available to operate the load, the light will turn on and the appliance will be restarted. If there isn?t enough power available, the light will turn off and the appliance will remain off until adequate power is available.
When plugged into a lower level power supply or running the generator, the RV?s total amp draw is displayed in a two digit ?Load Meter? window on the display panel. It behooves each RV user to check the existing amp draw before turning on more equipment.
NOTE: The load shedding capability on a 50 Amp Smart EMS? is automatically deactivated (turned off) if 50 Amp power is being supplied to the RV. Remember: Load shedding only occurs if a 50 Amp system is ?dogged? (adapted) down to a lower power source (30 Amp or 20 Amp), or operating on Generator power. This means, when the RV is attached to a 50 Amp power source, the 50 Amp ?Service Type? light on the display panel will be lit, as will all of the ?Power Status? lights (all loads able to operate), however, the ?Load Meter? will be blank. Because the load shedding is deactivated, there is no need for the system to monitor the total amp draw and does not do so.
So, my friends, when you are plugged into a 50 Amp power source, a blank ?Load Meter? does not mean the system is broken, but, instead, is working as designed!"
If you desire more technical detail, I recommend reading your Intellitec Manual very carefully. If you don't have one for your system, they are available at www.intellitec.com.
SarahW is on the mark. Highly recommend you go to http://www.intellitec.com/ and download the manual. You can also call them direct. They are very helpful. After unsuccessfully chasing a problem the last several days, that I was blaming on the EMS circuit board (replaced as previously noted) I called them this AM and they restored my confidence in the circuit board.
But first your issue. I took the liberty of pulling up your drawings and your original brochure https://winnebagoind.com/product-res...ct-information . Your Adventurer came std with a 5500W Onan @ 30amp. There was an option for a 7000W Onan @ 50amp. It appears that you do have a two stage compressor in your basement air. You should call Intellitec at 419-965-3014 and discuss your load shedding conundrum. BUT FIRST, look at your Onan and see which one you have, 5.5K or 7K, then look at your EMS display to see if you have a light for 50amp. Alongside the 20, 30, 50, Gen indicators will be a little screen that shows shedding order. As SarahW's excerpt describes, load shed is a 30 or 20amp function. Order of load shed is set at the factory, but the controlling dip switches on the (now infamous) circuit board can be reset at will (not likely smart). Armed with that information, when you speak to Intellitec, you should be able to ask pointed questions.
Since you asked about our latest go 'round with EMS, it goes like this. We pulled in, shut down the CUMMINS, made up the shore power, surgegard indicated green to go on all legs. But not one panel lit up on the One Stop. I blamed the EMS. Looked at trouble shooting in the manual, two choices. Laid my multimeter across J4 pin 4 (L1) and pin 6 (L2), read 240vac+/-. Good! Tested J3 pin 1 and pin 8 for 12vdc. Squat! Was sure another failed circuit board. Called Intellitec. Was informed that 12vdc does not come out of the circuit board, it comes in from 12vdc system and out to ONLY the EMC indicator panel. But, usually the rest of One Stop feeds from the same source. Guy tells me to look for a popped 12vdc breaker. The front TV breaker was popped. Reset it. One Stop lit up for a few seconds, then the breaker popped. Dark again. Guy tells me to look for a short in the entertainment area. Guy says only Winnebago knows why they fed the One Stop panel through the TV breaker. (And only W knows why they read the 3rd leg of 50amp off the water heater breaker) So, I pulled the TV out of the way, inspected that rat's nest of wiring , found a wire chafed by a sharp metal edge, cut and butt spliced it, set the breaker, all is well. Until our next electrical adventure.