Agilent Technologies 1220 Infinity II LC User Manual page 150

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