10 | Help with faults
Büchi Labortechnik AG
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Operation Manual Lyovapor™ L-300/L-300 Pro
Defrosting the ice condenser
Navigation path
➔
Configuration
➔
Service
➔
Defrosting system
Precondition:
R
A receiving vessel is installed. See Chapter 5.2.5 "Fitting the drain tubes", page 29
u
Pour approx. 5 L of warm water into the ice condenser through the open
intermediate valve.
u
Leave it to take effect for five minutes.
u
Navigate to the
Defrosting system
view via the navigation path.
u
Tap the drain valve that is to be opened.
ð
The control panel shows the drain valve highlighted in green.
u
Tap the function
[Open]
on the function bar.
u
Wait until the water has run off.
u
Tap the function
[Close]
on the function bar.
u
Repeat the instructions for defrosting the ice condenser until the temperature of
the defrosting water matches the ambient temperature.
10.5
Error messages
Error
message
Possible cause
Solution
5014
A power failure for 15 min.
u
Confirm to recover the instrument
and continue the process with risk
of sample melting.
u
Stop the process in standby,
release pressure manually by
activating the aeration valve in
service menu.
5042
Recovery of current drying
process.
Recovery of the latest process pa-
rameters (p, T) will be started auto-
matically.
u
Check samples after recovery.
u
Consider to use an UPS to keep
power fail time short.
5040
Only Pro instrument Primary dry-
ing: the actual sample tempera-
ture exceeded the collapse tem-
perature and safety tempera-
ture.
u
Choose lower shelf set
temperature.
Secondary drying: the actual
sample temperature is to close
to the set shelf temperature.
