Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-05-2009, 09:13 PM   #1
Winnebago Camper
 
Join Date: Mar 2009
Posts: 35
2004 Adventurer/W22 Basement A/C

I'm in over my head when it comes to electrical systems, but here's my problem:

The basement air in my 35U was on today, outside temp just under 90, and it could only keep the interior at 83. Something's not right. So I checked the return air, cleaned the outside fins (they weren't dirty) and noted that the system was pulling about 10-ish amps with the fan/AC on. I'm assuming only one compressor was working.

The coach is hooked up on a 30A service via the factory cord plus 75' extension. The service tripped once but has been fine since, though I've never seen the coach pull more than 18-20. The power panel is set to 30A service and the water heater, comp # 2, etc are lit.

If I start the generator, the coach draw heads near 20 (I'm assuming that compressor #2 kicks on), the temperature starts dropping, and the a/c system works fine.

So my assumption is that the a/c system is fine, comps 1 & 2 both work, but only one will work off 30A service after the generator is shut down. Why? The panel's only showing a max 20A draw, with all accessories supplied power. But the breaker blew once at about that draw (fine since). We're not close to 30A so why is comp # 2 not coming on?

Any hints on where to go from here?

Thanks in advance,

- Clay
__________________
2004 Winnebago Adventurer 35U/W22 Chassis
2004 Arctic Fox 860 on an '07 Silverado Duramax Dually
CMcCardell is offline   Reply With Quote
Old 09-05-2009, 09:34 PM   #2
Winnebago Camper
 
Join Date: Nov 2006
Location: Marysville, WA.
Posts: 10
Hi Clay, there is a selector button at that panel that says 20amp or 30amp Is the 30 amp selected. You just push it in to select. Hope that is it. Regards, Jerry Kraft
Jerry Kraft is offline   Reply With Quote
Old 09-06-2009, 08:09 AM   #3
Winnebago Camper
 
Join Date: Mar 2009
Posts: 35
Hi Jerry -

Yes, 30A is selected -

- Clay
__________________
2004 Winnebago Adventurer 35U/W22 Chassis
2004 Arctic Fox 860 on an '07 Silverado Duramax Dually
CMcCardell is offline   Reply With Quote
Old 09-06-2009, 12:50 PM   #4
Winnebago Owner
 
Join Date: Dec 2001
Posts: 212
I dont believe you ext cord will handle the amp draw of the second comp cutting in. Maybe thats why it wont work on ext cord but will otherwise. Try plugging in without ext cord if poss.
__________________
2004 adventurer/22.5 workhorse....
jdsr is offline   Reply With Quote
Old 09-06-2009, 10:03 PM   #5
Winnebago Owner
 
Dunnpe's Avatar
 
Join Date: Aug 2007
Location: Antioch CA
Posts: 79
jdsr hit it on the head. Unless you have an extension cord that has wires rated to carry a 30A draw you aren't getting that amount of amps to your coach. If I use a 12ga wire approx 75 long can't get the amps needed to go throught it. I use a 10awg approx 75 foot long ext. cord and it handles the 30 amp easily.
__________________
2003 Itasca Suncruiser 33V
8.1 GMC, Workhorse, Allison, Koni's
2004 Honda Element toad
Dunnpe is offline   Reply With Quote
Old 09-08-2009, 09:29 AM   #6
Winnebago Camper
 
Join Date: Mar 2009
Posts: 35
Thanks folks -

That makes sense, I suppose, but - how does Comp #2 know not to come on because of the extension cord limitation, when the panel is set to 30A?

- Clay
__________________
2004 Winnebago Adventurer 35U/W22 Chassis
2004 Arctic Fox 860 on an '07 Silverado Duramax Dually
CMcCardell is offline   Reply With Quote
Old 09-08-2009, 10:22 AM   #7
Winnebago Owner
 
Join Date: Dec 2001
Posts: 212
Quote:
Originally Posted by CMcCardell View Post
Thanks folks -

That makes sense, I suppose, but - how does Comp #2 know not to come on because of the extension cord limitation, when the panel is set to 30A?

- Clay
What Im thinking is it trys to come on but the cord wont allow that much amp draw. Its takes more amps for startup then running amps.This might not be your problem at all but to find out plug mh into outlet without ext cord and see if it works if poss. My guess with it working on the generator the cord might be the problem. You can call rvp. Those guys IMO are great to work with on their units.
__________________
2004 adventurer/22.5 workhorse....
jdsr is offline   Reply With Quote
Old 09-08-2009, 11:06 AM   #8
Winnebago Camper
 
Join Date: Nov 2006
Location: Marysville, WA.
Posts: 10
Hi Clay, I have to go along with the fact that your total length of extension cord is just too long. There is an electrical term called voltage drop. That happens when the conducting wire gets very long. Voltage drop is also afected by the size of the conductor, the smaller the wire the more the voltage drops. There is a formula, but I don't remember what it is. I am a retired electrician, but that was almost 20 years ago. In the length that you are using, instead of 120volts it could drop to as little as 100volts. That may be enough to start compressor # 1, but too little voltage for both compressors. I really think you should find a way to connect directly using only the cord that is wired into your rig. Regards, Jerry Kraft
Jerry Kraft is offline   Reply With Quote
Old 09-08-2009, 12:29 PM   #9
Winnebago Camper
 
Join Date: Mar 2009
Posts: 35
Thanks all - I appreciate the input/advice! At least (for a change) it's not something with the coach itself, in a likelihood -

Unfortunately the power isn't close enough to where I can feasibly park the coach - it's probably not a big deal as we're over the hot part of the year here in Wyoming, but I need to get an electrician to do some work around here at some point and I'll see what he says.

Thanks again!

- Clay
__________________
2004 Winnebago Adventurer 35U/W22 Chassis
2004 Arctic Fox 860 on an '07 Silverado Duramax Dually
CMcCardell is offline   Reply With Quote
Old 09-09-2009, 10:40 AM   #10
Winnie-Wise
 
bruceh's Avatar
 
Join Date: Aug 2007
Location: Coarsegold, CA
Posts: 260
I always keep one of those cheap CW voltmeters plugged into an AC outlet. I am betting that it would show low voltage in your case.
__________________
2001 Winnebago Adventurer, 35U, W-20 8.1
F+R Trac bars, F+R sway bars, SafTsteer, F Sumo Springs, 4 Koni FSDs
bruceh is offline   Reply With Quote
Old 09-10-2009, 03:59 PM   #11
Winnebago Owner
 
Dunnpe's Avatar
 
Join Date: Aug 2007
Location: Antioch CA
Posts: 79
Clay, if you Google " Extension Cord voltage drop you will find "Approximate voltage drop in extension cord gages" a pdf file that has a chart that explains the drop in layman terms
Hope this helps
__________________
2003 Itasca Suncruiser 33V
8.1 GMC, Workhorse, Allison, Koni's
2004 Honda Element toad
Dunnpe is offline   Reply With Quote
Old 09-11-2009, 10:34 AM   #12
Winnebago Camper
 
Join Date: Mar 2009
Posts: 35
Quote:
Originally Posted by Dunnpe View Post
Clay, if you Google " Extension Cord voltage drop you will find "Approximate voltage drop in extension cord gages" a pdf file that has a chart that explains the drop in layman terms
Hope this helps
Great tip, Peter - much appreciated!

- Clay
__________________
2004 Winnebago Adventurer 35U/W22 Chassis
2004 Arctic Fox 860 on an '07 Silverado Duramax Dually
CMcCardell is offline   Reply With Quote
Reply


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
Workhorse W22/Chevy Vortec 8.1L GoneFishin General Maintenance and Repair 16 10-20-2010 09:09 AM
W22/W20Brakes FriendlyHenry Running Gear, Axles, Brakes, Wheels and Tires 10 01-11-2010 08:06 PM
2004 Adventurer/W22 trailer wiring CMcCardell Winnebago Class A Motorhomes 8 05-08-2009 12:44 PM
UVW on a Sunrise/Voyage 35A W22? FrankO Winnebago Class A Motorhomes 8 02-20-2008 04:54 AM
Single wheel weight on W22 Petro Running Gear, Axles, Brakes, Wheels and Tires 12 06-01-2005 02:00 PM

» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 09:47 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
×