Roche cobas b 221 system

Roche Diagnostics May 2009
D-76 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Value flag s
o Call up "General fluidics test" and check that tubing paths are open and without
leaks, particularly the range VBI and BG measuring chamber.
h [System] > [Diagnostics] > [General fluidics test].
e For details, see diagrams in Chapter 2 Fluid actions.
Flag no. 2035 "Linearity not OK"
The sensitivity of the MSS sensor is too low.
Possible causes: o Sensor worn out
Remedy: o New installed MSS cartridge:
O After a polarization check the MSS linearity (Glu, Lac, Urea) using the sensor
report and perform a 2P calibration.
e For the details, see Sensor limits (Sensor report) on page D-135.
o Replace MSS cassette.
o Replace S3 Fluid Pack A.
Flag no. 2036 "Interference sensitivity"
The sensitivity of the MSS sensor is too low.
Possible causes: o Sensor worn out
Remedy: o New installed MSS cartridge:
O After a polarization check the MSS linearity (Glu, Lac, Urea) using the sensor
report and perform a 2P calibration.
e For the details, see Sensor limits (Sensor report) on page D-135.
o Replace MSS cassette.
o Replace S3 Fluid Pack A.
Flag no. 2040 "Cuvette not OK"
Calibrated layer thickness of the cuvette is outside the expected range.
Possible causes: o Contamination of the cuvette
Remedy: o Replace cuvette.
e For the details, see Replacing the cuvette on page B-59.
o Call up "Polychromator calibration".
o Call up "COOX calibration".
Flag no. 2041 "Ref. point not OK"
Reference point is outside the expected range.