Büchi Labortechnik AG
Help with faults | 10
Operation Manual Lyovapor™ L-200/L-200 Pro
91/100
Error message
Possible cause
Solution
5041
Only Pro instrument.
The actual pressure in ice
condenser is above defined
safety pressure during a
method run.
u
Resolve any leakages.
u
Choose lower shelf set
temperature.
5072
Short circuit at vacuum sen-
sor connection 1-2.
u
Disconnect vacuum sensor 1-2.
u
Check connectors and correct
wiring assembly.
5241
Final confirmation for the
aeration of the drying cham-
ber.
u
Confirm if aeration should be
done.
5242
Vacuum pump oil operating
hours exceed.
u
Change vacuum pump oil.
5243
User pressed skip button
during last method step in
phase.
u
Confirm step cancellation.
5270
The set ice condenser pres-
sure cannot be reached dur-
ing evacuation or vacuum
regulation.
u
Reduce sample loading for a
smaller sublimation rate.
u
Resolve possible leakages at
sealings, manifold valves, etc.
u
Check vacuum pump capacity
(open gas ballast, check for oil
contamination or aging).
5271
Actual ice condenser pres-
sure is lower than the set
value.
u
Stop the process.
u
Dry the ice condenser.
u
Speed up the sample loading/
sublimation.
5272
Pressure regulation valve
does not open.
u
Check acoustically if vacuum
regulation valve does open if a
higher pressure is set.
u
Check, if regulation and
aeration valves are swap
according operation manual.
5273
Actual ice condenser pres-
sure is higher than the set
value.
u
Stop flask attachment, until
pressure is at the target
pressure.
u
Check if the vacuum regulation
valve is closed correctly.
5274
Vacuum level cannot be
reached within given time-
out time
u
Resolve any leaks.
u
Check oil condition.
u
Check electrical connection of
pump.
5275
Pressure of 500mBar cannot
be reached within 30s
u
Resolve any leaks.
