I have a 1995 u280 with the hwh computerized air leveling
When I fire the coach up it does not always go into travel mode once it is aired up
Upon inspection I see that one set of bags hasn't filled
I can manually fill the bags then re level and after manually playing with the system the travel mode will come on
Also when parked the auxiliary air compressor will not come on if the system needs air
I am hoping that it is not the circuit board because I have read that they have to be rebuilt by hwh and the wait time is very long
I am in Yuma Arizona and cannot find a hwh service center
All suggestions are welcome
Donnie
I checked the compressor and it works
I had a similar problem this fall. The first thing I would do is to check the travel solenoid on the bag that isn't working. One quick test is to see if you can feel the magnetic pull with a screwdriver. I had other problems too, but that is where I would start.
In addition to the above suggestion, you might also try running the trouble shooting steps in the HWH Service Manual. Doing so might help you determine exactly what component is acting up. It is important to follow the steps precisely as listed - do not skip steps or assume something is working properly.
https://www.hwhcorp.com/ml11148.pdf
HWH repaired my computer. I had it back by the end of the next week. Considering UPS Ground shipping time, they had to have completed the repair in a day or two.
Thanks chuck
I'll go through the steps
ThAnks for the link to the manual
Donnie
Thanks Brett
Once I determine what the problem is I will call hwh
Hopefully they can turn it around that quickly if that is the problem
Donnie
The aux compressor will NOT come on unless the air in the tanks have depleted to < 70 lbs. The Foretravel levels DOWN until the air in the tanks is used up to that level. Once below 70 lbs can you hear the aux compressor run with a manual up arrow?
Twig
I will try that later in the week
Will not be able to until Friday
Thanks for the tip
Twig
Finally got a chance to get at the leveling system and yes the aux compressor does come on when I press the up arrow on the pad
It doesn't come on automatically when the pressure drops in tanks when the leveling system is left on
At present I am leveling the coach and then shutting the leveling system off
After about a week the coach goes a bit out of level and the tanks are almost empty so I start the engine air up and level the coach
You are
not giving the HWH system a chance to "do it's thing" if you prematurely turn it off, and then start the engine to level the coach.
To expand a bit on Twig's comment (above) there are
several conditions that must be met before the HWH aux compressor will
automatically run.
If the engine is off and the parking brake is set and the HWH leveling system is "ON" then the system is in auto-level mode.
If the HWH system is in auto-level mode and one or more yellow lights are showing on the touch panel, then the system will
release air from the appropriate air bags until level is achieved. It will continue to do this until one or more corners of the coach are all the way down to the hard stops. At that point, the system can no longer achieve level by releasing air.
The system will next try to achieve level by
adding air pressure to the appropriate bags. It will use the pressure stored in the front and rear air tanks to inflate the bags
until the system pressure drops below approximately 70-80 psi. At that point, if one or more yellow lights are still showing on the control panel, THEN the aux air compressor will be activated. Depending on the model year of the coach, the pressure from the aux compressor will either go directly to the 6-pack manifolds (bypassing the air tanks) OR it will go into one or more of the air tanks (and from there to the air bags).
Once the HWH system reaches the point where the aux compressor must run, it will continue to use that mode to maintain level as long as it works. If adding air to the bags will not achieve level, then the system will finally give up (EXCESS SLOPE indicator light on).
At which point, the "Excess Slope" light will likely come on.
Your nimble little fingers beat me to it. I was in the process of adding that note. 8)
Thanks Chuck
You could be correct we maybe are not patient enough
We will let the auto level do its thing and see what happens
Thanks
Donnie
Another little suggestion.
You say "after about a week the coach goes a bit out of level...". Your air system is apparently
very tight - so congrats on that!
In your case it would not be necessary to always leave the system turned "ON" (in auto level mode). You could turn it off when you first park, and leave it off until you notice the coach going out of level.
Then you could turn on the system by pushing the "AIR" button
twice. The system will wake up, go into auto level mode, query the level sensor, and if out of level one or more yellow lights will illuminate. The HWH brain will then take the appropriate steps (as discussed above) to correct the situation. Once level has again been achieved, you could turn the system off until the next time it is needed.
Using your system this way will eliminate one small (constant) parasitic drain on your batteries, and still allow the system to function as designed. It will also let you
avoid having to start the big engine
just to level the coach (this is a good thing).