Knauer Azura V6840, User Manual

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P 2.1L user manual V6840, version
3. 5
Troubleshooting 29
System Messages
If other system messages are displayed besides those listed below, please
turn the device off and then on. Inform the Technical Support of the manu-
facturer in case the system message repeats itself.
The system messages are in alphabetical order:
When purging, the
pump switches off. Check if the venting screw on the pressure sensor
is turned up.
Pump does not
transport solvent

Purge the pump head to remove the air bub-
bles.

Clean the ball valves.

Exchange the ball valves.

If the pump head seals are defective, solvent
enters the piston backflushing; inform the
technical support of the manufacturer.

Exchange the pump head
Pressure and flow
rate variations

Purge the pump head to remove the air bub-
bles.

Let the pump run for 1 h.

Always tighten the inlet screw 1 and outlet
screw 1 on the pump head with a torque
wrench and 15 Nm.

Clean the ball valves.

Exchange the ball valves.

Exchange the pump head

Inform the Technical Support of the manufac-
turer.
Pump head leaks

Inspect the inlet and outlet screw fittings of the
pump head.

If the seals are defective, eluent enters the pis-
ton backflushing; inform the Technical support
of the manufacturer.

Exchange the pump head
Flow rate is not cor-
rect Check the following options:

Check the data for the solvent compressibility

Cleaning the Check Valves

Exchange the ball valves
System message Solution
A Auto pump head
type: head data
uninitialized!

Switch the device off and on

Check whether a pump head with RFID recog-
nition has been installed

Repeat the automatic configuration step in the
chromatography software

Remove pump head, clean it and install it again