Possible cause and actionProblem
•
To high flow rate for drop sync
Decrease the flow rate or disable drop sync.
•
Air in the flow path
Check the flow path for air. Fill system and purge pumps. If this
error is recurrent, generate a System error report and contact
service.
•
Unclean drop sync sensor
Clean the drop sensor photocell located above the tube sensor
with a damp cloth.
•
The tubing is not correctly mounted in the tubing holder nut
Check that the tubing is correctly mounted, see Connect tubing
to ÄKTA pure, on page 107.
The fraction collector failed
to detect a drop and has
changed tube without drop
sync.
•
The fraction collector movement is blocked
Make sure that the fraction collector can move and is free from
obstructions.
The tube sensor has not de-
tected a new tube.
•
The flow rate is too high
Reduce the flow rate.
•
The fraction volume is too small
Collect larger fractions.
•
Too many fraction collector instructions have been sent
Wait for a while and try again.
The delay queue is full or
there is a tube change
overload.
Fraction numbering continues from where it was at the time of
the No tube error
Fraction numbering does
not start at 1 when the
fractionation is restared af-
ter a No tube error
Manually reset the fraction number in the System settings menu.
386 ÄKTA pure User Manual 29119969 AB
8 Troubleshooting
8.5 Troubleshooting: Fraction collector
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