HI Ron.
I have the -4 model. After I paired my unit. I did manually open and close the door to no effect on the “unknown” status. I tried to re-link the tilt sensor as described in this thread Linear GD00Z-4 Z-Wave - Stays as “Unknown”
No luck. I purchased a new CR2032 battery. Maybe the voltage is too low on the battery that came with the tilt sensor? I will know more tomorrow.