Büchi Labortechnik AG
Help with faults | 10
Operation Manual Lyovapor™ L-300/L-300 Pro
107/118
Error
message
Possible cause
Solution
5041
Only Pro instrument.
The actual pressure in ice con-
denser is above defined safety
pressure during a method run.
u
Choose lower shelf set
temperature.
u
Resolve any leakages.
5071
Motor driver of intermediate
valve or main valve or both
valves are not working.
u
Aerate the drying chamber by
manual opening the manifold
valve.
u
Remove the KF sealing at PMMA
main plate.
u
Restart instrument by main switch.
5072
Short circuit at vacuum sensor
connection 1-2.
u
Disconnect vacuum sensor 1-2.
u
Check connectors and correct
wiring assembly.
5170
Low temperature coolant pres-
sure takes more than 10 min to
drop below 10.5 Bar.
u
Start conditioning again.
u
Reduce ambient temperatures
below 25°C and increase
instrument clearance.
5241
Final confirmation for the aera-
tion of the drying chamber.
u
Confirm if aeration should be
done.
5242
Vacuum pump oil operating
hours exceed.
u
Change vacuum pump oil if other
vacuum pump is used.
5243
User pressed skip button during
last method step in phase.
u
Confirm step cancellation.
5270
The set ice condenser pressure
cannot be reached during evacu-
ation 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 pressure is
lower than the set value.
u
Stop the process.
u
Dry the ice condenser.
u
Speed up the sample loading/
sublimation.
5273
Actual ice condenser pressure 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 timeout time.
u
Resolve any leaks.
u
Check oil condition.
u
Check electrical connection of
pump.
