Büchi Labortechnik AG
Help with faults | 8
Operation Manual Pure Chromatography Instruments
81/102
8.4 Faults, possible causes and solutions (sample injection)
Malfunction Possible cause Solution
Leak around the in-
jection port
(Flash mode)
Dried sample or particulate
matter interferes with syringe
fitting
u Clean the injection port with
appropriate solvent or
remove particulate matter.
Defective injection port (Luer
fitting) adapter
u Replace the injection port.
Solid loader leaking Loader hardware is not prop-
erly set up
u Verify that the loader
hardware is set up correctly.
Leak around the
prep injection
valve/sample loop
Loose fitting u Find the loose fitting and
tighten it up.
8.5 Faults, possible causes and solutions (fraction collection)
Malfunction Possible cause Solution
Liquid not being col-
lected in fraction
tubes
Incorrect fraction collection
settings
u Verify that fraction
collection information is set
properly.
Liquid not centered
in fraction tube
Fraction collector is not cali-
brated
u Recalibrate the fraction
collector.
Fraction collector
(FC) arm does not
move
Fraction collector arm did not
home properly
u Reset the Fraction collector
arm.
Fraction collector arm motor is
slipping
u Tighten the motor coupler.
Fraction collector arm is ob-
structed
u Check for cable or burr in
the fraction collector arm
path and remove any
obstruction.
Tray not detected RFID tag is bad u Put another tray into the
same position to see if it is
recognized to confirm the
cause.
u Replace RFID tag.
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