. Shouldn't be on at lowest suspension position, but may come on when putting the height back up from low as filling the suspension robs the system of pressure for a few seconds.
Close, the stop light for pressure indicates LOW pressure at the security valve. You're right in that when the car is in low there is no pressure in the suspension side as effectively all the valves (Height correctors) are set to open so no pressure can build and the car sits down. As a part of this there is no demand for pressure so there is still pressure in the system (hence why putting the car on low isnt enough to fully depressurise the entire system) Soooo during this state the security valve still sees it's minimum threshold of pressure so that's why the light is out. Neither the sensor nor the dashboard have any clue where the suspension lever is set. Once you put the car into med or high you open both Height correctors up and ask for a lot of pressure and volume of fluid, it is this sudden drop that causes the light to come on and stay on until the pressure is back at the aforemetioned 140bar.Hell Razor5543 wrote: If you have your Xantia bottomed out, there will be no pressure in the pnuematic system. When you move the lever to the normal position, the system will try and raise her up. As there is no pressure, the system will tell you this by illuminating the ! and STOP lights. IIRC, once there is 140 bar in the system (abou 2000psi), the lights should go out, and the car will start lifting.
I hope this helps.
A 1/3 of Team WFA 'Clarkson'CitroJim wrote: I'm a pink fairy
but the pressure switch in the security valve turns off the warning light at about 90-100 bars, while normal operating pressure is between 135-170 bars. (Cut in and cut out pressures for the regulator) The pressure warning light will go out before the suspension starts rising, as the suspension requires more pressure (even unladden) than the warning light pressure switch does. Absence of the warning light only tells you that there is enough pressure available to safely and effectively operate the front brakes.Its worth noting that the LHM level float needs to be checked with the car in the high position. Make sure the float is in the middle of the two red lines.Hell Razor5543 wrote:The other reason for the ! and STOP lights to come on is if the reservoir is low. If you look at the level float, you will see a brass disk at the bottom. If this disk drops down far enough it touches two contacts, causing those lights to come on. The down side is that if they come on when you are driving, you don't know why until you pull over and look at the float.
