dan_paris The meridian flip routine starts exactly when it should, but the motors move just for one second and stop.
This sounds amost like it is trying to perform a GOTO (that is how the ASIAIR asks a mount to perform a Meridian Flip) when the mount thinks the target is still on the correct side of the pier. I.e., the ASIAIR thinks the target has already transited the Meridian, but the mount thinks the target is still on the original side of the meridian.
To check, you can do this indoors, and in the daytime even, try to set up an auto run session.
Use SkySafari, or one of many iOS apps, to find the current Local Sidereal Time (no, the ASIAIR is too crippled to display it; and it may be wrong anyway).
Home the mount. Do not ever manually slew across the Meridian after this. Only use GOTO.
Add 1 hour to the Local Sidereal Time and use that as the target's RA. For the target declination, use your approximate Latitude. This will place the target one hour east of the Meridian, and close to Zenith. The declination is not important, but if you make it your Latitude, the OTA will be pointing straight up as a further sanity check.
Ask ASIAIR to GOTO to this target.
Now go to AutoRun and set up a fake session. Turn on Auto Meridian Flip. There is no need to turn on guiding or anything else.
Start AutoRun, and you should see autorun report something like "Meridian flip in x minutes" at the bottom of the Preview window.
If you had set the RA to the LST plus 1 hour, AutoRun should report 60 minutes for the value of x.
If it is off by more than one or two minutes, the ASIAIR and the mount are not in sync. It could be either because of time, UTC offset or Longitude.
Chen