Dionex ICS-1000 - Erratic Flow;Pressure Reading; Excessive System Backpressure

4 • Troubleshooting
Doc. 031879-01 3/03 4-15
4.6 Erratic Flow/Pressure Reading
• Pump needs priming
Prime the pump (see Section B.12
).
• Damaged piston seal
Replace the piston seal (see Section 5.6
).
• Dirty pump check valve
Clean or replace the check valve (see Section 5.5
).
• 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 on the Dionex Reference Library CD-ROM
(P/N 053891).
4.7 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 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 5.1.3
).