Roche Diagnostics May 2009
D-108 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Important test routines
Status not ok – :
If an error value is displayed perform the following actions:
o Check primary light guide for damage and if necessary replace it.
e
For instructions, see Replacing the primary light guide on page B-56.
o Replace polychromator bilirubin.
e
For instructions, see Replacing the Polychromator Bilirubin on page B-54.
General fluidics test
h At the ready screen, press [System] > [Diagnostics] > [General fluidics test].
Overview The general fluidics test divides the cobas b 221 system into 11 ranges and performs
fluid tests in these ranges. The test results are displayed on the screen. The possible
test results are as follows:
o Ok – The test for that section could not find any errors.
o Leak or blocked – The range that has a leak or is blocked is shown exactly; the error
can be found in this range.
o Unknown – An error was detected that is not directly in this range but only affects
this range.
o Error – The range could not be tested because of errors in other ranges.
If errors are found, the relevant range must be tested for leakage or blockage from the
following diagrams. The 11 ranges of the general fluidics test are classified as
followed.
Figure D-14 COOX optical status
The general fluidics test described below applies to cobas b 221<5/6> systems!
For cobas b 221<1>–<4> systems, the number of areas in which fluidics tests can be performed is
reduced accordingly.
The vacuum pump is not tested within the general fluidics test.
e
For instructions, see Vacuum System on page D-101.
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