|
01-01-2013, 10:48 PM
|
#1
|
Rivet Master
Currently Looking...
Seattle
, WA
Join Date: May 2003
Posts: 620
|
No power to roof AC
I tried a search on the subject and couldn't find any info.
Before I take the moho to an RV repair place, I'll ask the gurus out there what you all think.
I have a 28' with only one roof AC. It's the original Coleman with heat strip. After starting the generator, I attempted to make the AC work, but nothing happens. I took the ceiling cover off and the on-off switch cover off as well. Put a meter up there and no juice! All the components look nice and clean and new.
So where do I look to see if it's a simple fix?
__________________
2000 Ford E-350 Super Duty 418ci/6.8L Triton V10 21’ Chinook Concourse XL
|
|
|
01-01-2013, 11:39 PM
|
#2
|
Rivet Master
2005 25' Safari
Salem
, Oregon
Join Date: Mar 2006
Posts: 8,378
|
Hi, have you checked yor circuit breakers?
__________________
Bob 2005 Safari 25-B
"Le Petit Chateau Argent" Small Silver Castle
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
|
|
|
01-02-2013, 08:04 AM
|
#3
|
Rivet Master
1988 32' Excella
Robbinsville
, New Jersey
Join Date: May 2012
Posts: 3,164
|
Quote:
Originally Posted by ROBERTSUNRUS
Hi, have you checked your circuit breakers?
|
Good 1st question.
2nd question; Did you overload your generator? (Are you getting 120V power to the rest of the trailer?)
|
|
|
01-02-2013, 11:19 AM
|
#4
|
Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
|
There could be two different circuit breakers in the circuit. One at the generator itself. The second is likely to be a 30 amp single breaker box hidden somewhere in a closet or under a bed, etc. If either is tripped you won't have power to the A/c.
Do you have a factory service manual showing the layout of the 120vac wiring system? If there is a separate 30 amp breaker it will likely be shown on one of the pages in manual.
Good luck!
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
|
|
|
01-02-2013, 02:09 PM
|
#5
|
Rivet Master
1989 34.5' Airstream 345
Silverton
, Colorado
Join Date: Oct 2003
Posts: 2,102
|
Does the 28 have a control switch(dial-type) for the various big-draw items(AC, Microwave)?
__________________
Michael & Tracy
1989 345 Motorhome
CHARTER MEMBERS: FOUR CORNERS UNIT, AND PROUD OF IT!!!
We live for the moment, 'cause when you get there, it's gone...
|
|
|
01-02-2013, 07:04 PM
|
#6
|
Rivet Master
Currently Looking...
Seattle
, WA
Join Date: May 2003
Posts: 620
|
I read the owner's manual and found the circuit breaker in the bathroom closet where the central vacuum is located. All the breakers were on, but I turned all off, then on again to make sure. Still doesn't work the AC. There are only two fuses at the generator, one says "IGN", so I think they pertain to 12V only. This will be intereseting to find out why no juice to the AC with GENSET on.
This 28' model does not have the manual control switches for AC, microwave, I bet because it only has the one roof AC.
__________________
2000 Ford E-350 Super Duty 418ci/6.8L Triton V10 21’ Chinook Concourse XL
|
|
|
01-02-2013, 08:18 PM
|
#7
|
Rivet Master
1982 28' Airstream 280
Port Angeles
, Washington
Join Date: Aug 2008
Posts: 1,943
|
Quote:
Originally Posted by Astrodokk
I read the owner's manual and found the circuit breaker in the bathroom closet where the central vacuum is located. All the breakers were on, but I turned all off, then on again to make sure. Still doesn't work the AC. There are only two fuses at the generator, one says "IGN", so I think they pertain to 12V only. This will be intereseting to find out why no juice to the AC with GENSET on.
This 28' model does not have the manual control switches for AC, microwave, I bet because it only has the one roof AC.
|
You need to go back to basics. You should have an automatic transfer switch to change from AC cord to generator supply. Do you have 120 volts if the 30 amp cord is plugged in? Also is there 120 volts at the outlets in the coach? Now when you disconnect the cord and start the generator do you have 120 volts at the outlets? If not pull the cover off the breaker box in the closet and check for 120 volts. If no voltage at the box go to the box in the aft under-body compartment where the 30 Amp cord is connected. This is where the transfer switch is located. If you can identify where you have 120 volts and where you don't then you can look for a fix.
__________________
Cheers, Dan
________________________________________
"Socialist governments traditionally do make a financial mess. They always run out of other people's money. It's quite a characteristic of them."
~ Margaret Thatcher ~
|
|
|
01-06-2013, 12:25 PM
|
#8
|
Airstream Driver
1994 30' Excella
1992 35' Airstream 350
Austin
, Texas
Join Date: Feb 2002
Posts: 5,224
|
Quote:
Originally Posted by Smartstream
You need to go back to basics. You should have an automatic transfer switch to change from AC cord to generator supply. Do you have 120 volts if the 30 amp cord is plugged in? Also is there 120 volts at the outlets in the coach? Now when you disconnect the cord and start the generator do you have 120 volts at the outlets? If not pull the cover off the breaker box in the closet and check for 120 volts. If no voltage at the box go to the box in the aft under-body compartment where the 30 Amp cord is connected. This is where the transfer switch is located. If you can identify where you have 120 volts and where you don't then you can look for a fix.
|
on his 28' model (since it is a 79 build) the transfer switch does not exist. Instead you plug your 30 amp shore plug in a receptacle in the cord department to use the Generator power. Was it plugged into that receptacle, Astro?
__________________
1994 30' Excella Front Kitchen Trailer
1990 25' Excella Travel trailer
1992 350LE Classic Touring Coach
AIR #13
|
|
|
01-06-2013, 02:02 PM
|
#9
|
Rivet Master
Currently Looking...
Seattle
, WA
Join Date: May 2003
Posts: 620
|
The coach electrical cord is plugged into the recepticle (which is generator supplied 110V power when plugged in).
I disconnected it and plugged it into shore power with an adapter, but all I hear is a slight hum at the roof AC.
I think I'll take it in to a pro to repair it, as I think it could be something internal to the Ac. All the recepticles work with either Genset or shore power.
__________________
2000 Ford E-350 Super Duty 418ci/6.8L Triton V10 21’ Chinook Concourse XL
|
|
|
01-06-2013, 02:28 PM
|
#10
|
Rivet Master
1974 20' Argosy 20
Richmond
, Kentucky
Join Date: Jan 2003
Posts: 9,116
|
Whenever we get that hum on the 310 ac units it usually turns out to mud dauber nests gumming things up.
Brad
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
|
|
|
01-07-2013, 11:14 AM
|
#11
|
Rivet Master
1984 31' Airstream310
Honokaa
, Hawaii
Join Date: Jun 2010
Posts: 993
|
We had the "hum" at our rear a/c unit when we bought it. When I got on the roof and took the cover off, found that a piece of foam rubber that was supposed to seal the cover to the fan housing had gotten sucked into the fan and kept it from turning. Pulled it out, and now she runs...
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|