Roche Diagnostics May 2009
B-34 Service Manual · Version 9.0
4 Components cobas b 221 system
Fluid mixing system (FMS)
6
Disconnect the two FMS cable connectors on the board (see above).
7
Disconnect the two cable connectors (ground) from the FMS actuators.
8
Open the bottle compartment cover and remove all bottles or packs from the
cobas b 221 system.
9
Disconnect all tube connections exiting from the FMS (see below, A).
10
Unscrew the four screws (see above, B) holding the FMS and pull the FMS
forward.
Use the reverse order for assembly.
A Cable connectors (red/greet/blue, yellow/red)
Figure B-20 FMS control board-2
A Tube connections B FMS holding screws
Figure B-21 FMS unit
Do not remove the fastening screws completely, because they are secured against loss.
Test the functioning of the FMS valves (V19 and VM) under
h
[System] > [Component test] >
[Valves] > [FMS].
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