Roche Diagnostics May 2009
Service Manual · Version 9.0 D-63
cobas b 221 system 7 Troubleshooting
Value flag s
Flag no. 1012 "Sample pos. error (6)"
Conductivity at sensor input was too low.
Possible causes: o Blockage
o MSS output pump tube is defective
o No fluid in the measuring chamber
Remedy: o Replace MSS output pump tube.
e
For the details, see Replacing the pump tube on page B-67.
o Call up fill routines "Aspirate standby solution" and "Fill ref. electrode MSS"
(reference electrode only for instruments with urea installed).
h [System] > [Utilities] > [Fluid actions] > [Fill routines].
o Perform "Calibration for Ready".
h [System] > [Calibrations] > [Calibration for Ready].
o Run "MSS polarization".
o Perform a wetting routine for MSS.
h [System] > [Utilities] > [Fluid actions] > [Wetting routines].
o Call up "General fluidics test" and check that tubing paths are open and without
leaks. h [System] > [Diagnostics] > [General fluidics test].
o Replace MSS cassette.
Flag no. 1013 "Sample sep. error (2)"
No air packet was detected between calibration solution and sample. The sample was
not aspirated or aspirated too late.
Possible causes: o Deposits or blockage in measuring path
o MSS output pump tube is defective
Remedy: o Replace MSS output pump tube.
e
For the details, see Replacing the pump tube on page B-67.
o Call up fill routines "Aspirate standby solution" and "Fill ref. electrode MSS"
(reference electrode only for instruments with urea installed).
h [System] > [Utilities] > [Fluid actions] > [Fill routines].
o Run "MSS polarization".
o Call up "General fluidics test" and check that tubing paths are open and without
leaks. h [System] > [Diagnostics] > [General fluidics test].
o Replace MSS cassette.
Flag no. 1014 "Sample pos. error (7)"
Conductivity at BSA sensor inside MSS cassette is too low.
Possible causes: o Unhomogenous sample/calibration solution
o Insufficient sample/calibration solution detected
o Measuring path insufficiently wetted
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