Roche Diagnostics May 2009
Service Manual · Version 9.0 D-45
cobas b 221 system 7 Troubleshooting
Module stops
o Call up General hardware test and replace damaged parts.
h [System] > [Diagnostics] > [General hardware test].
Error 20080 "PP error"
The pump performance of the MSS output pump falls outside the specified range.
o To correct errors replace tubing at the MSS output pump and call up MSS system
calibration.
o Replace pump head of MSS output pump.
e
For instructions, see Replacing the pump head on page B-66.
o Replace MSS output pump.
e
For instructions, see Replacing a peristaltic pump on page B-64.
o Replace the mainboard unit.
e
For instructions, see Replacing the Mainboard unit on page B-89.
Error 20081 "MSS pol. running"
The MSS polarization phase is not finished yet.
o The sensor will be operational after the system calibration which is automatically
performed.
Error 20082 "MSS pol. not ok"
The blood sample required for MSS polarization could not be positioned.
o Repeat MSS polarization.
o Replace the MSS measuring chamber.
e
For instructions, see Replacing the MSS measuring chamber on page B-44.
o Check SS1 to SS4 sample sensors in the sensor test and if necessary calibrate by
calling up "Wash".
o Check SS1 to SS4 sample sensors visually for fluid residues.
Fluid present:
O Test corresponding valves and if necessary replace them.
e
For instructions, see Replacing the valves from sample distributor cartridge and Hb
cartridge on page B-83.
O Check tubing system for blockages and replace the relevant components.
No fluid present:
O Replace corresponding sample sensor.
e
For instructions, see Replacing the SS1, SS2, SS3 and SS4 optical sensors on
page B-39.
O Replace sample sensor board.
e
For instructions, see Replacing the sample sensor board on page B-91.
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