Siemens ADVIA 1800, Operator'S Manual, Page: 169 / 222

Maintenance 169
NOTE: The remainder of this procedure describes the steps to clean the WUD and
DWUD wash stations. Perform the entire procedure for the WUD lines and nozzles, then
repeat the entire procedure for the DWUD lines and nozzles. The various parts are
described as the "DWUD/WUD," meaning one or the other, depending upon which is
being cleaned at the time, and does not mean both simultaneously.
WARNING
Be careful of unexpected movements of the nozzles. These movements can cause
injury or damage to the nozzles.
2. Prepare the WUD/DWUD for cleaning:
a. With the system in READY mode, log on as
supervisor
.
b. Place paper towels on top of the RRV and DTT cuvettes directly under the
WUD/DWUD nozzles as a precaution.
c. Using a 4-mm hex wrench, loosen the captive screw ( 1 ) that secures the
WUD/DWUD wash head to the WUD/DWUD mechanism.
Figure 5-34. WUD and DWUD captive screw
NOTE:
Use a shallow tray for washing the nozzles. A tray with a depth of
35–40 mm is most suitable. Trays with higher sides may require additional wash
solution.
d. Lift up the WUD/DWUD wash head and place it in a shallow plastic tray on top
of the paper towels.