The sequence for opening is as follows: When you push the button to open:
1. The air seal begins to deflate
2.once deflated, the pins retract from the slide
3. the slide motor begins to move the slide out
4 once out, the slide seal inflates
Mark, there is one other automatic function that occurs when the "air seal begins to deflate" and that is the tag axle exhausts and drops the rear of the coach to take the "CHARGE" off of the chassis. The normal stance of the entire chassis is to drape over the steer and drive axles. The TAG AXLE actually pushes and tries to take the restful arch out of the shell.
If you don't hear the hiss of air loss and the rear of the coach doesn't sink when you begin the sequence to run the front slide out, manually dump the tag axle before you run the room out and see if you still have error codes.
If error coder don't show up, then there maybe a programming glitch that isn't including DUMPING TAG.
Just a thought from remembering our previous slideroom coach issues.
Jim and Chris
2001 Featherlite Vogue XLV 2 slide with Rivets-current coach, 1999 shell
Previous 22 years,
We have owned every kind of Prevost shell but an H3-40