Roche cobas b 221 system

Roche Diagnostics May 2009
Service Manual · Version 9.0 D-87
cobas b 221 system 7 Troubleshooting
Value flag s
Flag no. 8074 "IfS ref. point not ok"
Problem at reference point of MSS standby solution at interference sensor.
Possible causes: o Aspiration of MSS standby solution not ok
o Aspiration of MSS reference solution not ok
Remedy: o Call up "Aspirate standby solution".
h [System] > [Utilities] > [Fluid actions] > [Fill routines].
o Call up "Fill ref. electrode MSS".
o Perform "Calibration for ready".
o Call up "Wetting routine" for MSS.
h [System] > [Utilities] > [Fluid actions] > [Wetting routines].
o Call up "Contact path test" for MSS and aspirate standby solution.
e For the details, see Contact path test on page D-95.
o Replace MSS cassette.
Flag no. 8075 "IfS ADC error"
Interference sensor ADC error.
Possible causes: Problem with ADC of an interference sensor on the amplifier board.
Remedy: o Replace MSS module.
o If the conductivity is not OK, replace mainboard.
e For instructions, see Replacing the Mainboard unit on page B-89.
Flag no. 8076 "IfS mean not OK"
Final calibration value of an interference sensor (IfS) is out of range.
Possible causes: o Transponder error on S3 Fluid Pack A
o Defective electrode
o Incorrect Baro value
Remedy: o Call up "System Calibration" for MSS.
o Replace MSS cassette.
o Replace S3 Fluid Pack A.
o Check Baro settings.
e For instructions, see Baro sensor on page D-101, Baro settings on page B-5.
o Insert electrode simulator and act accordingly.