150 1220 Infinity II LC System User Manual
9
Test Functions and Calibration
Solvent Delivery System
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.
Table 30 First plateau negative, second plateau positive
Potential Cause Corrective Action
Leaking outlet valve. Clean the outlet valve. Ensure the sieve in the
outlet valves are installed correctly. Tighten the
outlet valve.
Loose pump head screws. Ensure the pump head screws are tight.
Leaking seals or scratched plungers. Exchange the pump seals. Check the plunger for
scratches. Exchange if scratched.
Table 31 Ramp 3 does not reach limit
Potential Cause Corrective Action
Pump stopped due to error. Check the logbook for error messages.
Large leaks (visible) at the pump seals. Exchange the pump seals.
Large leaks (visible) at active inlet valve, outlet
valve, or purge valve.
Ensure the leaky components are installed
tightly. Exchange the component if required.
Table 32 Third plateau negative (pressure drop > 2 bar/min
Potential Cause Corrective Action
Loose or leaky fittings. Ensure all fittings are tight, or exchange
capillary.
Loose purge valve. Tighten the purge valve (14 mm 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.
Table 29 First plateau positive, second and third plateau negative
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