Bayer HealthCare Rapidlab 800 - Manual (Page 317)

4Ć33 Troubleshooting the System
D21 Processing Error:
Problem
An internal communication problem between the system processors has occurred.
Qualifiers: 1 3
Solutions
Qualifier Procedure
1 Shut the system down and restart as described in Shutting Down and
Restarting the System in Section 5.
3 Disconnect the CO-ox sample path as described in Disconnecting the
CO-ox Sample Path, page 4-92. You can continue to analyze samples
on the base model.
Check that the communications cable connecting the CO-ox module
to the base model is installed correctly.
Shut the system down and restart as described in Shutting Down and
Restarting the System in Section 5.
If the D code reappears, contact your Service Representative.
D21