User manual

82 Bio-inert Quaternary Pump User Manual
7 Error Information
Module Error Messages
Pressure Below Lower Limit
The system pressure has fallen below the lower pressure limit.
Pressure Signal Missing
The pressure signal of the damper is missing.
The pressure signal of the damper must be within a specific voltage range. If
the pressure signal is missing, the processor detects a voltage of
approximately -120mV across the damper connector.
Probable cause Suggested actions
1 Lower pressure limit set too high.
Ensure the lower pressure limit is set to a value
suitable for the analysis.
2 Air bubbles in the mobile phase.
• Ensure solvents are degassed. Purge the
module.
• Ensure solvent inlet filters are not blocked.
3 Leak.
• Inspect the pump head, capillaries and
fittings for signs of a leak.
• Purge the module. Run a pressure test to
determine whether the seals or other
module components are defective.
4 Defective damper.
Please contact your Agilent service
representative.
5 Defective main board.
Please contact your Agilent service
representative.
6 Defective active inlet valve (AIV)
Replace AIV cartridge.
Probable cause Suggested actions
1 Damper disconnected.
Please contact your Agilent service
representative.
2 Defective damper.
Please contact your Agilent service
representative.