Siemens ADVIA 2400 Maintenance Procedures page 58

9. Pour enough wash solution into the tray, so the center nozzle (yellow-labeled
overflow nozzle) is in liquid, without overflowing the tray.
10. Repeat steps 4 and 5, to clean the WUD/DWUD lines with the 10% Probe Wash 3 or
20% bleach solution.
11. Repeat steps 4 and 5 until the lines are cleaned thoroughly.
NOTE
As an aid to cleaning the aspiration lines, manually lift the WUD/DWUD wash head
in and out of the cleaning solution to introduce air into the lines.
12. When the operation mode returns to READY, lift the WUD/DWUD wash head out of
the tray and temporally place it on top of the WUD/DWUD assembly.
13. Using a lint-free cloth, carefully clean the stainless steel nozzles of the WUD/DWUD
wash head.
14. Remove, empty, and rinse the tray to remove any residual cleaning solution, then
place it back on paper toweling under the WUD/DWUD nozzles.
15. Place the WUD/DWUD wash head into the tray, then fill the tray with deionized
water.
16. Repeat steps 4 and 5 to flush out the cleaning solution with deionized water.
17. Repeat this sequence twice as many times as the sequence was run with the cleaning
solution, to ensure that no residual cleaning solution is left in the lines.
NOTE
A colored food dye may be added to the rinse water as a visual aid, to verify the blue
and yellow aspiration lines are not clogged and are working properly.
18. When the operation mode returns to READY, move the WUD/DWUD wash head on
top of the WUD/DWUD assembly and secure it by tightening the 4-mm captive hex
screw.
19. Remove the tray and paper towels from the system.
20. Repeat this procedure from step 2 for the other wash head, if needed, and then
proceed to step 21.
21. Exit the JEOL Maintenance window.
22. Run a Startup Wash (WASH3) procedure on the system, then verify proper hydraulic
operation and mechanical alignment of the WUD/DWUD assemblies during the
Startup Wash.
23. Run your laboratory's quality control material and verify the results are within
acceptable ranges.
162 ADVIA 2400 Operator's Guide