10 | Help with faults
Büchi Labortechnik AG
88/100
Operation Manual Lyovapor™ L-200/L-200 Pro
10
Help with faults
10.1
Troubleshooting
Problem
Possible cause
Action
Compressor fails to
start or switches off
No power supply to compres-
sor
u
Check the power supply and
switch on the device.
Compressor overheated
u
Allow the compressor to
cool down.
u
Check ambient conditions.
Circuit-breaker has tripped
u
Reset circuit of L-200.
Cooling tempera-
ture is not achieved
Wrong ambient conditions
Adjust ambient conditions. See
Installation site
Too much ice in the ice con-
denser
Defrost the ice condenser.
10.2
Faults, possible causes and remedies
Malfunction
Possible cause
Remedy
Instrument does not
work
Instrument is not connected to
the power supply.
u
Make sure that the power
supply is connected and
switched on.
Main valve or vac-
uum pump switches
over frequently
Vacuum system is leaking.
u
If necessary, replace tubing
and/or seals.
Main valve does not
switch over
Main valve fitted wrong way
round.
u
Fit main valve correct way
round (arrow pointing
towards vacuum pump).
Main valve lead not plugged
in.
u
Make sure that the electrical
lead of the main valve is
plugged into the correct
socket on the rear of the
instrument.
