- Sep 15, 2015
is there any other alpine owners here?
TonyDtorch said:look what Google found....http://www.alpinecoachassociation.com/chassis/Electric%20Aux%20Fan-03%20Alpine.pdf
youracman said:MYRV2- A/C problems always interest me. I researched your issue some....over in the irv2 Forum. [ irv2.com>Forums>Owners Forums>Alpine Coach] When the list of posts appears, look just above it and to the right side for "Search this Forum"; type in Fan; then hit GO. When you then read the thread(s) "Alpine dash air 2002" and "Hydraulic radiator fan" and "Radiator Fan" I believe you will conclude that Alpine didn't design your coach to work the way it does.....you almost surely have a hardware/or "black box" problem. Heck....what RV owner doesn't? For me......about 1 per trip. :^] )
Here's a recap of some info I found on that site......FWIW:
For 2003 and prior years a "Wax Valve" system was used to control the hydraulic fan. The wax valve turns up the fan speed when the engine warms up; it is spec'd to have a minimum fan speed (not zero) regardless of engine temp. Several posters said their fan does not have a minimum speed but instead behaves just like the fan on your coach; only one poster (owns a 2001) said his fan was always on anytime the engine was running......higher speed after warm up. One 2003 owner said Source Engineering had an orifice kit that would bypass some hydraulic fluid around the wax valve so the fan would always turn (at some lower speed) prior to engine warm up......I went to the Source Engineering website but unfortunately I didn't see that exact product shown.
For 2004 and on, an electronic control was used to modulate the fan speed.......versus a wax valve. As I read it, with the electronic controller, if the A/C is "On" the hydraulic fan is supposed to run at full speed .........regardless of ambient air temp or engine coolant temp. Since your coach is a 2004, the posts I read would indicate you should have an electronic controller. In any event, after reading several threads on the Alpine Owners Forum over on irv2, it sure seems that your hydraulic fan is designed to run if the A/C is on.
Suggestion(s): Post your problem on the irv2 Alpine Owners forum. Hopefully another owner of a 2004 or later coach will respond with good, meaningful data for you (probably several will.) Also, you might look online at sourcerv.com/products ....... that's Source Engineering and their phone number is listed there ........ a call just might be very beneficial....dunno.
Hope this sheds a little light ..... and helps some. Good luck with a fix, and safe travels.
That's how the Alpine should work as well .....YOU MUST HAVE AIR FLOW ACROSS CONDENSER So I still believe you have a FAN problem. ASE Master Auto 30+ years!Gary RV Roamer said:I don't have first hand knowledge, but I'm told the dash a/c system in mine take 3.5 lbs for a "normal charge" but 6.5 lb if the system is evacuated and requires a total new charge. That's for a Denso a/c system on a Freightliner XCM chassis with Cummins 8.9L. I don't think the chassis and engine type has much if anything to do with the a/c charge requirements, though. Gary 3.5 lbs sounds abt. right.
In my cooling system, activating the dash a/c switch forces the radiator cooling fan to run continuously. It's a variable speed hydraulic fan, so it typically is not running full speed, but it always runs at some low speed to keep air flowing over the condensor. That usually holds the engine and transmission temperatures down near their low thresholds, but still ok for proper performance.
I guess you could put an aux. fan/fans with a relay in series with the compressor circuit on the condenser. Comparing it to your car, well it will never work as well. A temp/differential more then 30 degrees is about all you expect when its that hot so 100 outside 70 feels better. You are removing heat from inside and shedding it outside. You never told me what kind of FAN you have so i'm still assuming its Hyd.? Most cars/truck with a fan clutch get some air flow cold. A wiring diagram would help and if its a Freight liner chassis maybe you can call them for some feedback. Good luck
I'm currently doing my first repair of this ongoing issue. Many calls, but never had one to fix. The wax valve isn't able to do anything for the A/C. Modified the stock brackets and installed a multiflow condenser with fans on a pressure switch.the dash ac on my alpine has not worked since I've own it... the dealer I bought it from added and let out freon.... no machine...
so beings I own an auto repair/ muffler shop that is worked and run by my sons, that and I paid about 4k for a machine to pull the old out, vacume the moisture out, and do a leak check...that and my boys went to school for auto air.....which is why they won't allow me to touch any of the equipment....
first thing that I find.... it only had .86 lbs of freon....next my son says, "I'm gonna vacume the system for 60 minutes to make darn sure there is no moisture in there
so that's done....he asked me how much freon it takes ....I read on line that the system takes 3.5 lbs....not gosable but all I know...
so it's vacumed down.... no leaks..... and time to charge......I say put the 3.5 that I read on the alpine section of a web site
would really like to know if that is right.... I will be expecting max performance from the system.... thanks for any and all replies