Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-25-2010, 07:30 PM   #1
2 Rivet Member
 
1973 31' Sovereign
Austin , Texas
Join Date: May 2009
Posts: 24
Troubleshoot my new converter set up

Hi all.

When I got my trailer none of the 12 volt system was working--a former owner had actually removed the univolt and not replaced it with anything. I bought a new 40 amp converter and 12 v fuse block. I am running the system without a battery as I am always hooked up to shore power (for now).

I am not very experienced with electricity, but I was pretty sure I had everything wired up correctly, plugged the new converter in, and...nothing.

Here's what I did:
1. Ran thick gauge red and black wires from the converter to the fuse panel.
2. Attached all the 12v wires to the fuse panel (purple, brown, etc.)
3. Added 20 amp 12v fuses from an auto supply store.

Am I missing a step here? Any help would be appreciated.

Thanks in advance!
__________________

__________________
seventythree is offline   Reply With Quote
Old 01-25-2010, 08:03 PM   #2
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Quote:
Originally Posted by seventythree View Post
Hi all.

When I got my trailer none of the 12 volt system was working--a former owner had actually removed the univolt and not replaced it with anything. I bought a new 40 amp converter and 12 v fuse block. I am running the system without a battery as I am always hooked up to shore power (for now).

I am not very experienced with electricity, but I was pretty sure I had everything wired up correctly, plugged the new converter in, and...nothing.

Here's what I did:
1. Ran thick gauge red and black wires from the converter to the fuse panel.
2. Attached all the 12v wires to the fuse panel (purple, brown, etc.)
3. Added 20 amp 12v fuses from an auto supply store.

Am I missing a step here? Any help would be appreciated.

Thanks in advance!
Sounds like you didn't connect to a ground.

What's a "thick gauge" wire??

40 amps is really stretching it for your trailer, as 55 to 60 would be far superior.

At 40 amps, you will be overloading the charger many times. Don't be surprised if it burns out soon.

Running a charger without a battery, is asking for more problems. The battery helps to regulate the voltage. Without the battery, you probably will burn out many light bulbs.

What kind of charger??

Andy
__________________

__________________
Inland RV Center, In is offline   Reply With Quote
Old 01-25-2010, 08:22 PM   #3
2 Rivet Member
 
1973 31' Sovereign
Austin , Texas
Join Date: May 2009
Posts: 24
Oops. It is a 30 amp IOTA converter/charger that i got from best converters. Not grounding could be why it isn't running?

Thanks.
__________________
seventythree is offline   Reply With Quote
Old 01-25-2010, 08:30 PM   #4
2 Rivet Member
 
1973 31' Sovereign
Austin , Texas
Join Date: May 2009
Posts: 24
Should I run a ground wire from the converter to the fuse panel and then from the fuse panel to the inside trailer wall?
__________________
seventythree is offline   Reply With Quote
Old 01-25-2010, 08:39 PM   #5
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Quote:
Originally Posted by seventythree View Post
Should I run a ground wire from the converter to the fuse panel and then from the fuse panel to the inside trailer wall?
All the 12 volt DC circuits, have a ground for a return wire.

If the negative side is not grounded, then nothing will work.

Your 30 amp charger, will be history in no time.

Sorry.

Andy
__________________
Inland RV Center, In is offline   Reply With Quote
Old 01-26-2010, 04:35 PM   #6
2 Rivet Member
 
1973 31' Sovereign
Austin , Texas
Join Date: May 2009
Posts: 24
Thanks for the help. I'm going to exchange the 30-amp for a 55 and retry this project in a couple weeks.
__________________
seventythree is offline   Reply With Quote
Old 01-26-2010, 04:37 PM   #7
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Quote:
Originally Posted by seventythree View Post
Thanks for the help. I'm going to exchange the 30-amp for a 55 and retry this project in a couple weeks.
Now your talking "real power".

Andy
__________________
Inland RV Center, In is offline   Reply With Quote
Old 01-26-2010, 04:56 PM   #8
Rivet Master
 
TomW's Avatar
 
1967 26' Overlander
Huntsville , Alabama
Join Date: Dec 2003
Posts: 2,918
Images: 2
Enlighten me

Quote:
Originally Posted by Inland RV Center, In View Post
All the 12 volt DC circuits, have a ground for a return wire.

If the negative side is not grounded, then nothing will work.

Your 30 amp charger, will be history in no time.
I do not follow your logic.

If nothing will work, why will the charger be history? If nothing works, there is no current draw.

A 40 amp charger (as he specified in post #1) is sufficient to power the member's Airstream as it was designed. As no one asked about increased power requirements, why the testosterone about "real power"?

Tom
TomW is offline   Reply With Quote
Old 01-26-2010, 05:30 PM   #9
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Quote:
Originally Posted by TomW View Post
I do not follow your logic.

If nothing will work, why will the charger be history? If nothing works, there is no current draw.

A 40 amp charger (as he specified in post #1) is sufficient to power the member's Airstream as it was designed. As no one asked about increased power requirements, why the testosterone about "real power"?

Tom
Tom.

Airstream discovered the hard way, why Univolts were dying so often.

They switched to higher Univolts that stopped the burnout problems.

Charge the battery, run the water pump, run a few lights, run the furnace and you are way past the 30 amp that might be available.

Keep in mind, in spite of a 30 amp output for a Univolt, that 30 amps is not to be used anyway near the maximum output.

That's why Airstrean finally went to and has stayed with 55 amps.

The 73 manual says that the fuse for the furnace, is 20 amp.

Now the system is performing, without cooking, even if extra batteries are added.

Any power supply that operates at or near full power, will not last very long.

Andy
__________________
Inland RV Center, In is offline   Reply With Quote
Old 01-26-2010, 05:36 PM   #10
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
I would expect that modern, switching power supplies would be able to run at 100% rated output capacity continuously without failure.

Modern converters are current limited. Older ones were not.
__________________
Jammer is offline   Reply With Quote
Old 01-26-2010, 06:05 PM   #11
2 Rivet Member
 
1971 27' Overlander
Chesapeake , Virginia
Join Date: Dec 2009
Posts: 28
12V Diagrams

Here is a couple a diagrams that might help you
Attached Thumbnails
Click image for larger version

Name:	12voltdp.JPG
Views:	106
Size:	32.0 KB
ID:	94824  
Attached Files
File Type: pdf 12v diagram internal.pdf (2.79 MB, 72 views)
__________________
VaGem is offline   Reply With Quote
Old 01-27-2010, 09:20 AM   #12
2 Rivet Member
 
1973 31' Sovereign
Austin , Texas
Join Date: May 2009
Posts: 24
Thanks for your help, all.

I'm still a little confused about wiring the system--especially because I'm doing it without a battery for now.

In the bundle of 12v wires there are two thicker white ones, I assume that these are the ground wires. Where do I attach these? Also, where should I run a ground line from the converter to?
__________________
seventythree is offline   Reply With Quote
Old 01-27-2010, 11:28 AM   #13
2 Rivet Member
 
1971 27' Overlander
Chesapeake , Virginia
Join Date: Dec 2009
Posts: 28
Here is a diagram I made for my A/S. It is a simplified electrical diagram for both 120VAC and 12VDC. Not all airstream are the same, they will differ quite a bit. Hope this helps
Attached Files
File Type: pdf Simplified Electrical.pdf (15.9 KB, 109 views)
__________________
VaGem is offline   Reply With Quote
Old 01-30-2010, 10:03 PM   #14
Rivet Master
Commercial Member
 
New Borockton , Alabama
Join Date: Sep 2002
Posts: 1,288
Images: 21
Running a modern switching converter without a battery will not hurt a thing.
Airstream has a thing for the single stage Parallax and as of yet, I don't kow why.
I might also upgrade to a larger unit but not because it will fail sooner. Never had one claim in 7 years for that. That is just not true.

Jammer is correct, you can run them at max output and it won't hurt anything except if you run out of power which is really not likely even with a 30 amp but you are just limited on charging current.
__________________

__________________
Randy...Converters, Inverters, Trimetric, Surge Protectors, Zamp Solar, AGM Batteries
www.bestconverter.com
68 Overlander is offline   Reply With Quote
Reply

Tags
converter, wiring, 12 Volt, 12 volt, univolt


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
Guide to troubleshoot your fridge problem Cristina1966 Refrigerators 4 07-03-2017 09:52 PM
Converter fuse blowing (new converter) wannaroam Batteries, Univolts, Converters & Inverters 28 07-06-2015 03:39 PM
Getting set up BayouFishin Member Introductions 14 08-24-2008 07:25 AM
Then depression set in.... till General Repair Forum 19 10-01-2004 10:42 AM
hitch set-up? remark83 Hitches, Couplers & Balls 3 05-16-2003 07:24 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:21 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.