Fridge on Battery while towing? - Page 4 - Escape Trailer Owners Community

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Old 05-06-2016, 12:19 PM   #31
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Originally Posted by Boots View Post
Hi, new here. Just picked up our 21'. First trailer experience. We had refrigerator on battery while towing and it discharged trailer battery--don't want to do that.
Do you know for sure that your tow vehicle is providing 12 volts to the trailer plug?

Some don't. Mine didn't, I added a 12 volt line to the 7 pin connector. I tow on propane but it's handy to be able to have the capacity to top up the batteries when solar isn't already doing the job.

Ron
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Old 05-06-2016, 12:28 PM   #32
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How does the refer know that the source is the tow 12v and not the internal Escape 12v battery? I'd like to understand the wizardly involved here?
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Old 05-06-2016, 12:44 PM   #33
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The refer doesn't need to know. Running the fridge off the battery is a one way trip down hill. The refer will know at some point that it's not getting enough voltage

If the tug is supplying voltage to the trailer it's like using a battery while it's hooked to a battery charger. Depending on the load the trailer battery will either very slowly discharge or, depending on the alternator and vehicle, arrive at the destination fully charged. The fridge doesn't care what the situation is as long as it's getting the required voltage.

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Old 05-06-2016, 01:14 PM   #34
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Exactly,
So the refer will not turn off when you turn off the ignition
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Old 05-06-2016, 01:16 PM   #35
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Quote:
Originally Posted by Klem View Post
Not sure if you are aware of the AES feature in all the modern Dometic frigs? It automatically switches off the propane for 15 minutes each time it senses a turn off of the ignition.

After 15 minutes it will restart the propane automatically. Check out your owner's manual.



12V OPERATION
AES will select the 12V mode of operation as soon as the vehicle engine is running (detected by the alternator connection of the fridge D+).
If the 12V DC goes down below 9V DC, the system will shut down completely.
It is not allowed to have a naked flame at a gas filling station. If you are not sure, that your stop is shorter than 15 min , you are advised to set the oN/oFF switch (1) to “oFF”, when stopping at a lling station SWITCHING bETWEEN ENERGY SOURCES
When switching from one energy source to another, there are some delays implemented in the AES system. The 15 min. delay between switching off the engine and starting gas mode is intended to delay the starting of gas mode e.g. when stopping at a lling station.
Didn't know that Klem Thankyou for the information . Pat
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Old 05-06-2016, 01:30 PM   #36
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A little more history for those that want walk down memory lane.

6.7 Frig Tinkering ideas?

I chose to 'trick' the AES into not 'seeing' the voltage rise/fall when turning on/off the ignition. My reason at the time was all those 15 minute shutdowns of propane have an impact on cooling performance and I wanted to see how much. The RML was such a piece of junk ... I couldn't tell a difference, it was too warm either way.

With the RMD replacement I still keep it disconnected so there is no chance the frig can kill our batteries. And the propane runs constantly when I choose propane.
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Old 05-06-2016, 01:55 PM   #37
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Good points Klem.

The bottom line is that there's a variety of systems out there. Some don't shut off automatically such an owner installed system that requires a manual shut-off with a switch or solenoid, and some that do shut off and some vehicles that don't provide power to the plug. Retro-fitted 4 pin to 7-pin typically don't have power to the trailer unless it's added.

So, unless buying new with a trailer package that specifically states what the 7 pin power situation is, new owners should find out for themselves. Handy feature to have on occasion.

Ron
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Old 05-06-2016, 02:19 PM   #38
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Quote:
Originally Posted by Klem View Post
A little more history for those that want walk down memory lane.

6.7 Frig Tinkering ideas?

I chose to 'trick' the AES into not 'seeing' the voltage rise/fall when turning on/off the ignition. My reason at the time was all those 15 minute shutdowns of propane have an impact on cooling performance and I wanted to see how much. The RML was such a piece of junk ... I couldn't tell a difference, it was too warm either way.

With the RMD replacement I still keep it disconnected so there is no chance the frig can kill our batteries. And the propane runs constantly when I choose propane.
Klem do we have this AES system ? We still have and now works 90% better orignal 4.3 . Pat
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Old 05-06-2016, 02:44 PM   #39
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OK, I’m a bit slow here, so I have a question: My wife likes to use the microwave in our 5.0. when we dry camp. We have the duel 6-volts and solar, but last summer the battery was just not keeping up. I plugged the trailer into the truck and ran the engine, hoping to augment the trailer battery. Did this do any good? If I don’t have the 12v line on my 7-pin connector was I wasting gas?
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Old 05-06-2016, 02:48 PM   #40
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Quote:
Originally Posted by Patandlinda View Post
Klem do we have this AES system ? We still have and now works 90% better orignal 4.3 . Pat
Hi Pat, from this manual IF the last digit of your model number has a '5' it's AES. If it's a '1' it's manual.

http://www.dometic.com/QBankFiles3/E...nual_17593.pdf

I had a long talk with s Dometic tech back in the RML days and he said the 15 minute shut down could get to be a problem if you did a series of ignition on/off cycles. So I disconnected the big DC connector but used a wire nut to keep the little red wire hot to power the electronics.

Who knows if in the newer frigs they upgraded the AES software control? Did they get some of the bugs out
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