
Possible cause and action
Problem
• Air trapped in the pump heads
• Partially blocked solvent filters
• Leaking connections
• Piston seal leakage
• Check valve malfunction
• Piston damaged
See Examples of pump pressure curves, on page 390 for examples
of pump pressure curves.
Erratic pump pressure
• The cable between the system pump and the ICU is not con-
nected.
Contact Service.
• The cable between the sample pump and the ÄKTA pure instru-
ment is not connected.
Connect the cable.
• A fuse in the instrument ICU is broken.
Contact Service.
The pump is not found by
the instrument
• The air intake on the rear or on the left side of the instrument
is covered
Make sure that none of the air intakes on the instrument are
covered.
• Hot surroundings
Decrease the room temperature. Maximum operating tempera-
ture is 35°C.
• Hardware error
Switch off the instrument and wait until the temperature has
decreased. Restart the instrument. If this error is recurrent, gen-
erate a System error report and contact Service.
The internal temperature of
the pump is too high
• The pressure has increased due to increased viscosity
The viscosity increases in cold room. Lower the flow when per-
forming runs in a cold room.
High pressure alarm
388
ÄKTA pure User Manual 29119969 AB
8 Troubleshooting
8.6 Troubleshooting: Pumps
Summary of Contents for AKTApure
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