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Troubleshooting and Test Functions
Evaluating the Results
Potential Causes of Pressure Test Failure
After isolating and fixing the cause of the leak, repeat the pressure test to
confirm the system is pressure tight.
Potential Cause (Pump) Corrective Action
Purge valve open. Close the purge valve.
Loose or leaky fitting. Tighten the fitting or exchange the capillary.
Damaged pump seals or plungers. Run the leak test to confirm the leak.
Loose purge valve. Tighten the purge valve nut (14 mm wrench).
Potential Cause (Autosampler) Corrective Action
Loose or leaky fitting. Tighten or exchange the fitting or capillary.
Rotor seal (injection valve). Exchange the rotor seal.
Damaged metering seal or plunger. Exchange the metering seal. Check the
plunger for scratches. Exchange the plunger if
required.
Needle seat. Exchange the needle seat.
Potential Cause (Column Compartment) Corrective Action
Loose or leaky fitting. Tighten or exchange the fitting or capillary.
Rotor seal (column switching valve). Exchange the rotor seal.