RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 09-22-2015, 07:47 PM   #1
Join Date: Sep 2015
Location: Wyoming
Posts: 79
Roof Air/Gen Set problem

We have just purchased a 2007 34DDS. We have an unusual problem: The air conditioners work fine on shore power. Once we disconnect shore power and switch to Genset, the front air conditioner starts, then when the back one starts, it shuts everything down. The air conditioners won't work running on inverter/battery. Any thoughts?

Thanks for your input!

Also, our dash air runs cool when we start the coach, but then goes hot and stays hot. Good thing we're getting cooler weather now!

Thanks for any suggestions!
ladytj1754 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-23-2015, 03:23 PM   #2
Senior Member
wa8yxm's Avatar
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,023
They should not work on Inverter.. But should on the generator.

However we are way short on info.. You need to do a few things.

First,, Obtain a decent clamp on ammeter.. Harbor Freight has one that is decent in the less than 20 buck range but Sears has two in the 50-150 dollar range that I would recommend.. They do both DC and AC (The HF one is AC only).

Now, identify the wires that feed power to the A/Cs.. Many places you may be able to access them.. Clamp on the white wire and read the amps. Just the wite, no other wire. (Or if you like just the black, you can use either one but I'd rather play with the white, safer)

Write 'em down and post.
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 09-23-2015, 04:10 PM   #3
Senior Member
Join Date: Oct 2014
Posts: 1,526
Correct, the roof A/C's should not work from inverter power. They only work from generator or shore power.

I will speculate on our dash A/C issue: Since it works when you first start, the A/C system itself is working. But, as the engine runs, the dash heater sounds like it is ON. The dash heater can certainly overpower the dash A/C (the air goes through both the heater core and A/C evaporator before coming out the vents.

Really don't have enough information to draw a conclusion on the roof A/C shutting down the generator. Could be something as simple as a clogged air filter that does not allow the generator to pick up the additional load. Could be as wa8yxm suggests a load issue with one of the A/C's. In addition to his amp-draw test, did you notice voltage (at any of the house-type outlets) when the generator shut down? If for any reason the generator is unable to supply voltage within its programmed range, it will automatically shut down.

More information will help in pinpointing the problem.

2003 Alpine 38FDDS
wolfe10 is online now   Reply With Quote
Old 09-24-2015, 06:46 AM   #4
Join Date: Sep 2015
Location: Wyoming
Posts: 79
Roof air

Thanks everyone for your input on this! We conducted some troubleshooting and found it may be the compressor on the roof air. The fan continues to work with the generator, but as soon as the cool function is activated, they both shut down. Going to take it to TransWest in Denver in a couple weeks to have them go through it.

Did not know it's not supposed to work on inverter. That's good to know. Makes sense.

ladytj1754 is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Roof Sag Quick and Dirty Fix Cliffy Travel Trailer Discussion 4 11-11-2015 10:33 AM
Possible Roof Sealant Problem SonnyB Entegra Owner's Forum 28 03-19-2015 02:51 PM
Need some help roof maintenance noserider Class A Motorhome Discussions 7 09-15-2014 10:24 PM
Found the roof leak !!!!! Bad Dome installation ! Karlos National RV Owner's Forum 1 03-03-2014 07:14 PM

All times are GMT -6. The time now is 06:54 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.