Bayer HealthCare Rapidlab 800 - Manual (Page 315)

4Ć31 Troubleshooting the System
D19 Fluid Detector Error:
Problem
Fluid detector millivolt (mV) reading is beyond predefined limits.
Qualifiers: FD3 FD4
Solutions
Perform a wash. Observe the fluid as it moves through the system for sufficient
wash flow, wash segments, and no leaks at the sample port.
Perform the Fluid Detector Test as described on page 4-66.
If the D code reappears, contact your Service Representative.
D19