You will more than likely see an 82 error before the 15. The version 1 is somewhat temperature tempermental. Relays 443:1, 443:2 or 486 did not activate at the floor or deactivate when the car speed is above the SL1 setting. Replace it with an ADON version 2 and run an ADON learn on the system. This should take care of the issue.

Just for kicks and giggles, what is contract speed on the car? I'm wondering what SL1 is set at also. If the car has been running and this is a recent problem the SL1 setting is not the issue.