Roche cobas b 221 system

Roche Diagnostics May 2009
D-86 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Value flag s
o Perform "Calibration for Ready".
o Replace MSS cassette.
Flag no. 8071 "IfS calculation error (1)"
Microcontroller calculation error on interference sensor.
Possible causes: o An illegal calculation operation has occurred
Remedy: o Remove and replace MSS cassette.
o Remove and replace S3 Fluid Pack A.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Reinstall software.
e For the details, see Software update on page B-104.
Flag no. 8072 "IfS calculation error (2)"
Microcontroller calculation error on interference sensor.
Possible causes: o An illegal calculation operation has occurred
Remedy: o Remove and replace MSS cassette.
o Remove and replace S3 Fluid Pack A.
o Turn the instrument off, wait at least 3 minutes, and turn it back on.
o Reinstall software.
e For the details, see Software update on page B-104.
Flag no. 8073 "IfS sensor signal unstable"
Interference sensor signal cannot be reproduced.
Possible causes: o Unsuitable sample type used
o Measuring path contaminated
o Interference signals in the measuring path during measurement value acquisition
o Interference signals over the reference electrodes during measurement value
acquisition
Remedy: o If this interference applies to the complete MSS module, the reference electrode
must be changed (reference electrode only for instruments with urea installed).
o Perform "Calibration for Ready".
o Call up the stability monitor and check "Details" of the "Electrode slope". If the
MSS cassette is defective, it is displayed. Replace the MSS cassette.
e For the details, see Stability monitor on page D-120.
o Insert electrode simulator and act accordingly.