Bayer HealthCare Rapidlab 800 - Manual (Page 311)

4Ć27 Troubleshooting the System
D12 Sample Door Position Error
Problem
Sample door detector cannot determine whether the sample door is open or closed.
Solutions
Check that your hand does not prevent the door from closing.
Check that the door is installed correctly.
Perform the Sample Entry Test as described on page 4-67.
If the D code reappears, contact your Service Representative.
D12