Dionex ICS-90 - 4.3 Pump Difficult to Prime or Loses Prime

4 • Troubleshooting
Doc. 031851-05 12/04 4-5
• Leaking MMS III
Refer to the suppressor manual for troubleshooting procedures. The
suppressor manual is included on the Dionex Reference Library CD-ROM
(P/N 055405), located in the ICS-90 Ship Kit.
• Leaking injection valve
Make sure the liquid line connections to the transducer are tight. Refer to
Installation of Dionex Liquid Line Fittings (Document No. 031432) for
tightening requirements. Replace any damaged fittings.
Liquid leaks from behind the valve stator may indicate a scratched rotor seal.
Rebuild the injection valve (see Section 5.9
).
• Leaking DS5 Detection Stabilizer
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 reservoir and/or no eluent connected
Fill the reservoir. Make sure all connections are secure.
• Eluent reservoir not pressurized
Make sure the gas line is properly connected between the air regulator and the
reservoir, and that the inlet gas supply is regulated to between 0.55 and
0.83 MPa (80 and 120 psi) and connected to the air regulator. Make sure the
eluent reservoir cap is screwed on tightly. See Section B.9
and Section B.10
for detailed connection instructions.
• Dirty check valve
Clean and/or replace the pump check valve (see Section 5.5
).
• Liquid leaks at junction between pump head and pump casting
Replace the piston seal (see Section 5.6
).