Re: HWH wired issues
Reply #5 –
Had some time figured I would post the Active Air basics and to what to check while driving when the AA starts going wacky. I have included the manual for you to read over.
Here is some background
You can press the stop button ANY time (does not mater if you are going down the road) and it will shut down the computer which should stop all activity until you restart or you press the reset button.
You can press the reset button ANY time even going down the road. You will get a message to press the HOME button and it will reboot the computer. I have had to do this many time driving down the road when things were going wacky
You can adjust the pressure in each bag from the schraders valves which are accessible from a compartment. In my coach they are in the same compartment as the aqua hot. From these valves is a direct connection to the control block for each bag.
Your coach has total of 3 ride height sensors. 1 in the front, and 1 at the right and left sides of drive axle.
The tag axle air pressures are decided by the HWH computer based off what the 3 sensors are reporting back to the computer. Each height sensor has set values of Max High, High, Medium (This should be normal ride height) and low. If you go and look where all of the HWH equipment is located you will see a lot of LED lights on, off, or flashing. These lights are reporting what the computer and sensors are doing.
Each front air bags has a raise and a lower valve The raise only lets air in and the lower only lets the air out.
The drive Axle has total of 4 bags There is an air line going from each bag to the drive axle manifold assembly. The two on each side are connected together so both bags on each side should have the same air pressure. Each side of the drive bags has 3 valves, 1 lower, 1 raise, and 1 high volume raise
The tag axle is like the front axle with each side having two valves 1 raise and 1 lower.
From the HWH display and keypad.
Check the pressure page and see what the pressures are at the different bags.
(this is a good one to look at just to get familiar as to where pressures are when you are sitting and driving. )
In pulling up a picture of my pressure page, which I am thinking I was just sitting still the reading were
LT 91 LD 66 LF 98 System 127 RF 98 RD 75 RT 85
Yours may be different.
Other page to check is the "Status page 1"
This page shows you what the computer thinks is going on with the different ride height sensors. If you look at the page you will see
FT Sensor status,
LR sensor status,
RR sensor status,
L_Tag Sensor Stat,
R_Tag Sensor Stat
Remember there are only 3 ride height sensors. You can try to find the two for the tag but there are none. The computer just makes the Tag's height up.
While viewing this screen all locations should be showing you one of the three. High, Low, or Changing What should happen is the computer will add air to the bags if Low, release air if High and do nothing if it says changing. I have tried to get HWH to explain to me why sometime it may be high or low for a while and it looks like nothing is happening. I have not gotten a good answer to my question. When your coach starts going wacky you will need to look at this screen and see what it is showing. It is also interesting to watch also while just driving to see what is going on.
When you press the page forward button it takes you to the "Status Page 2" This page should be telling you what should be happening with the air valves/solenoids. Let say the LF Air Solenoid is saying "RAISE" then the one solenoid that is used to raise the left front should be on and letting air in the LF bag. If is says "LOWER" then the one valve for releasing air should be open and letting air out of the bag. If it says "OFF" then both valves should be off. While you are driving down the road you will see the status change as the computer decides to add or remove air from the different bags. When your coach is going wacky you should also take note of this page as to what it is showing.
In my coach the right rear was rising up like you were saying your front was. One of the tests I did was when it was acting up, sitting still with the engine running I went to the Man Air > Dump button and let all of the air out of the bags. I then went to pressure page and checked to make sure I had let all of the air out of all of the bags. I then sat there watch the right drive bag air pressure increasing, then went to the "Status Page 2" to see if the computer was trying to put air in the bag and it showed off. I then knew I had a leaking valve. James at FOT told me that if I have a valve leaking I can try raising and lowering that bag and it might stop leaking, which when I did it stopped the the moment. I did not know if it was the High volume valve or the regular rise valve so I replaced both.
I had asked HWH when they called me back Why, but the answer was an engineer would have to answer that question. Question was, with the leaking rise valve adding air to the bag, and the height control sensor was showing High, why was the computer not activating the lower valve to let the excess air out.
Topic: HWH wired issues