Dionex ICS-900 - Pump Difficult to Prime or Loses Prime

ICS-900 Operator’s Manual
58 Doc. 065215-02 9/09
• Leaking pump head waste valve
Make sure the waste valve is closed. To close the valve, turn the knob
clockwise, just until tight. DO NOT OVERTIGHTEN! Overtightening
may damage the valve and the pump head.
Inspect the pump head. If the waste valve is the source of the leak, replace the
waste valve seal (see Section 5.9
).
• Leaking MMS 300
Refer to the suppressor manual for troubleshooting procedures. Suppressor
manuals are included on the Dionex Reference Library CD-ROM
(P/N 053891).
• Leaking injection valve
Make sure the liquid line connections to the valve are tight. Replace any
damaged fittings. Refer to Installation of Dionex Liquid Line Fittings
(Document No. 031432) for tightening requirements. The manual is included
on the Dionex Reference Library CD-ROM (P/N 053891).
Liquid leaks from behind the valve stator may indicate a scratched rotor seal.
Rebuild the injection valve (see Section 5.10
).
• Leaking conductivity cell
Check the waste lines for blockage; trapped particles can plug the lines and
cause a restriction and/or leak. If necessary, clear the waste lines by reversing
the direction of flow.
Make sure the plumbing downstream from the cell is clear; a blockage may
overpressurize the cell, causing it to leak. If the problem continues, contact
Dionex for assistance.
4.3 Pump Difficult to Prime or Loses Prime
• Empty eluent bottle and/or no eluent connected
Fill the bottle. Make sure all connections are secure.
• Dirty check valve
Clean or replace the pump check valve (see Section 5.6
).