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Troubleshooting and Test Functions
Evaluating the Results
All plateaus negative
First plateau positive, second and third plateau negative
Potential Cause Corrective Action
Loose or leaky fittings. Ensure all fittings are tight, or exchange
capillary.
Loose purge valve. Tighten the purge valve (14mm wrench).
Contaminated purge valve. Open and close purge valve to flush out
contamination. Exchange the valve if still
leaky.
Loose pump head screws. Ensure the pump head screws are tight.
Leaking seals or scratched plungers. Exchange the pump seals. Check the plungers
for scratches. Exchange if scratched.
Leaking outlet valve. Exchange the outlet valve.
Leaky damper. Exchange damper.
Potential Cause Corrective Action
Air in pump or new seals not yet seated. Flush pump thoroughly with isopropanol under
pressure (use restriction capillary).
Loose active inlet valve. Tighten the active inlet valve (14mm wrench).
Do not overtighten!
Loose pump head screws. Ensure the pump head screws are tight.
Loose outlet valve. Ensure the sieve in the outlet valve is installed
correctly. Tighten the outlet valve.
Leaking seal or scratched plunger. Exchange the pump seals. Check the plungers
for scratches. Exchange if scratched.
Defective active inlet valve. Exchange the active inlet valve.