Büchi Labortechnik AG
Cleaning and servicing | 9
Operation Manual Lyovapor™ L-200/L-200 Pro
83/100
Component
Action
Interval
Draining valve
u
Remove the strainer.
u
Fill ice condenser with water.
u
Open the drain valve manually.
u
Loosen deposits from drain valve using
compressed air.
Weekly
Heat exchanger
u
Remove dust and foreign objects from
the ventilation slots using compressed
air or a vacuum cleaner.
Monthly
View
u
Wipe down the display with a damp
cloth.
Monthly
9.2
Performing a vacuum test
The vacuum test checks the performance capacity of the vacuum system.
Time
re-
quired:
max. 10 min
Navigation path
➜
Configuration
➜
Servicing
➜
Vacuum test
Precondition:
R
Conditioning of the instrument has been completed.
R
A top-mount drying rack is fitted.
R
The top-mount drying rack does not contain sample.
u
Navigate to the action
[Vacuum Test]
via the navigation path.
u
Specify a required setting for the vacuum to be achieved.
u
Specify a required time within which the vacuum is to be reached.
u
Tap the function
[Start]
on the function bar.
ð
The vacuum test starts.
ð
The status bar shows the status Vacuum Test.
ð
If the vacuum pressure is not below 500 mbar after 30 s, the vacuum test
automatically aborts.
ð
After completion of the vacuum test, the
[Vacuum test]
line shows whether the
vacuum test has been passed or not.
Troubleshooting after failed vacuum test
Possible cause
Action
Top-mount drying rack not correctly fit-
ted
Fit the top-mount drying rack correctly.
Top-mount drying rack is damaged
Check function of PMMA parts, replace
manifold valves, clean drain valve.
O-rings dirty
Wipe down the O-rings with a damp
cloth.
