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ICS-2100 Ion Chromatography System
92 Doc. 065291-01 3/09
• Damaged piston seal
Replace the piston seal (see Section 5.7
).
• Dirty pump check valve
Clean or replace the check valve (see Section 5.6
).
• Leaking liquid lines or fittings
Check the liquid lines and fittings for small leaks. Tighten or, if necessary,
replace the liquid line connection (see Section 5.3
). 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).
4.8 Excessive System Backpressure
• Restriction in the system plumbing
Check all liquid lines for crimping or blockage. Make sure the ferrule fittings
are not overtightened onto tubing. Refer to Installation of Dionex Liquid Line
Fittings (Document No. 031432) for details. The manual is included on the
Dionex Reference Library CD-ROM (P/N 053891).
If you have trouble isolating the restriction, refer to Section 5.2
.
• Plugged or damaged fitting
Isolate the faulty fitting by loosening fittings, one by one, until the pressure
returns to normal. Repair or replace the fitting (see Section 5.3
).
• Flow rate through the columns too high
Set the correct rate for your application. If an incorrect flow rate calibration is
suspected, calibrate the flow (see Section 5.1.4
).
• Clogged column bed supports
Refer to the instructions in the column manual for troubleshooting guidance.
Column manuals are included on the Dionex Reference Library CD-ROM
(P/N 053891).
• Contaminated columns
Clean the columns as instructed in the column manual or replace the guard
column.