Roche cobas b 221 system

Roche Diagnostics May 2009
D-50 Service Manual · Version 9.0
7 Troubleshooting cobas b 221 system
Module stops
Errors 20115...20118 "module error AQC"
The required position was not reached.
o Call up "Wash AutoQC".
h [System] > [Wash & cleaning] > [Wash AutoQC].
o Check all plug connectors on the AQC board.
o Replace the AQC board.
e For instructions, see Replacing the AQC board on page B-124.
Error 20120 "AQC wash error"
The SS2 detects a bad wash profile of the AQC sample line.
o Call up "wash AQC" and visually check whether a water-air mixture is being
aspirated through the wash tube.
Water only:
O Wash nozzle is blocked; clean or replace nozzle.
Air only:
O Check function of AQC motors and if necessary replace them.
o Check wash port for damage and if necessary replace it.
e For instructions, see Replacing the wash port on page B-135.
o Check AQC needle for damage or blockage and if necessary replace it.
e For instructions, see Replacing the AutoQC steel tube on page B-133.
o Replace the T&D disk.
e For instructions, see Replacing the T&D disk on page B-26.
Errors 20122...20141 "AQC pos. error"
The required position was not reached.
o Call up "Wash AutoQC".
h [System] > [Wash & cleaning] > [Wash AutoQC].
o Check function of AQC motors and if necessary replace them.
h [System] > [Component test] > [Aggregates] > [AutoQC motors].