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Old 05-02-2015, 09:49 AM   #1
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Help troubleshooting AC

I'm heading to a dog show but after testing my AC I can't get it to work on battery. I have an E7 error. My battery said 100% when I started 20 min ago but is down to 75% with just the radio on. I looked at the fuses and they are ok. I reset the switches in the fuse box by flipping them off and back on.... I don't know what to do.Click image for larger version

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Old 05-02-2015, 10:42 AM   #2
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I don't have an Interstate nor a newer A/C.
I may be wrong but I don't think the A/C will run off of the battery. But it will run off of the generator.
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Old 05-02-2015, 11:00 AM   #3
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Quick response - using my iPhone: AC can only run from the generator or while plugged into shore power. The standard inverter can only supply 1 killowatt, the AC consumes 2.5 kilowatts.


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Old 05-02-2015, 11:10 AM   #4
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OMG thank you!!! That Did it I called colonial service dept earlier and they said I needed to be plugged in and generator won't work but the generator does work Thank you thank you!!!


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Old 05-02-2015, 11:12 AM   #5
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I'm disappointed that I can't cool the back of the van while in transit though... Unless running the gen. While driving is ok.


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Old 05-02-2015, 12:04 PM   #6
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A couple of tips:
If you open the extreme rear windows a little while driving, the cool air from the cab AC will flow through towards the back of the van and out the rear windows and help cool the back of the van in the process.
Don't leave the inverter on unless you need 120v for some reason, and that will likely be for the TV or sockets for charging. It will drain the batteries unnecessarily, and maintaining the batteries is an important part of owning an Interstate.


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Old 05-02-2015, 01:54 PM   #7
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Thanks for the Tips!!! Really appreciate it 😊


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Old 05-02-2015, 02:27 PM   #8
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FYI...running the generator while driving is absolutely ok, they are designed for this purpose.


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Old 05-02-2015, 04:41 PM   #9
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If you start with a full tank of propane (a little over 14 gallons) you should be able to run the generator for about 24 hours before you run out of propane. Plan your fuel stops to include refilling the propane as necessary.

That's assuming you don't use propane for anything else while en route.

Also, if you intend to run the generator while underway, make sure the crankcase oil level is where it's supposed to be. The generator has a "low oil" sensor that will shut down the generator, and sometimes— not often, but sometimes— highway maneuvers will cause the oil to slosh enough to trigger the low oil sensor; more often if the oil level actually is slightly low.

If the generator shuts off that way, just pull over somewhere level, shut off the rooftop A/C, and restart the generator. Once the generator is running, restart the A/C and continue on your way.
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Old 05-05-2015, 08:08 PM   #10
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Well that's a little bit of a disappointment… A lot of the dog shows don't have electricity so I'm not sure I've bought the right RV for what I want to do… I want to be able to dry camp for three days with AC since I have dogs with a lot of hair.😁 I guess I could refill On propane after 24hrs but that means breaking down, finding LP and setting up again. Ugh!


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Old 05-05-2015, 08:13 PM   #11
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Not sure if there are many options for running AC for 72 hours straight without shore power.
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Old 05-05-2015, 08:48 PM   #12
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I've heard mention of a "Fast Idle" option that can be dealer installed that would allow extended use of the chassis A/C which should be sufficient at nite unless you're camped in Death Valley.
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Old 05-05-2015, 09:15 PM   #13
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Quote:
Originally Posted by k9jackie View Post
Well that's a little bit of a disappointment… A lot of the dog shows don't have electricity so I'm not sure I've bought the right RV for what I want to do… I want to be able to dry camp for three days with AC since I have dogs with a lot of hair.😁 I guess I could refill On propane after 24hrs but that means breaking down, finding LP and setting up again. Ugh!


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There is no B-van RV that I know of that would allow three days of AC without shore power. A Roadtrek E-trek or Advanced-RV would come close but there is a limit to using the Sprinter engine for stationary power. Only a large Class-C or Class-A with a big diesel generator and large fuel tank can do what you propose. Sorry - but the need for AC is a real challenge.


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Old 05-05-2015, 09:45 PM   #14
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There is no B-van RV that I know of that would allow three days of AC without shore power. A Roadtrek E-trek or Advanced-RV would come close but there is a limit to using the Sprinter engine for stationary power. Only a large Class-C or Class-A with a big diesel generator and large fuel tank can do what you propose. Sorry - but the need for AC is a real challenge.


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That's what I meant... I probably should have bought a class A but that's a lot to handle on my own! Plus they are not as pretty As my friend said, it's a touring coach not meant for extended stays. I'll have to think about it more but I may do a trade-in next year. This certainly has been a learning experience.
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