11 Error Information
Module-Specific Error Messages
2D-LC User Guide 314
Valve Switching Failed
Error ID: 24001
The valve drive was not able to operate the valve head correctly. Either due to
mechanical reasons or the movement couldn’t be detected correctly.
Valve Tag Violation
Error ID: 24006
The valve drive identified a different valve head than it had identified during the
last initialization.
Probable cause Suggested actions
1 Mechanical problems. Friction too high or
blockages on the valve drive’s motor or on
the valve head.
• Check valve head for correct installation
• Try to identify the source of trouble by
installing a different valve head if possible.
• Contact your Agilent Service representative.
2 Defect Sensor on the Valve Drive Motor
• Check valve head for correct installation
• Try to identify the source of trouble by
installing a different valve head if possible.
• Contact your Agilent Service representative.
Probable cause Suggested actions
1 A valve head has been exchanged
(hot-plugged) while the valve drive was still
powered on.
Change the valve head. It is important to have the
valve switched off for at least 10 s after or before
a new valve head has been installed.
Soft power-down power supply of the valve drive.
Whenever you want to power cycle the valve drive for a re-boot, it needs to be
powered off for at least 10 seconds.
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