Troubleshooting The Pump Leak Rate Test - Agilent Technologies InfinityLab LC Series User Manual

6 Troubleshooting and Diagnostics
Pump Leak Rate Test

Troubleshooting the Pump Leak Rate Test

Secondary Leak > 3 µL/min
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Dynamic Leak > 30 µL/min or Dynamic Leak Rate Test fails
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1290 Infinity II High-Speed Pumps User Manual
Leak between the OBV and automatic purge valve
• Check for visible leaks on fittings and connectors
• Connector not fixed / tight enough
• Connector damaged
• Leaky filter frit assembly
• Remove the seal wash tubes from the support ring and check for leak into
the seal wash path
• Main seal leaking/damaged
• Piston damaged
• Remove waste lines from the automatic purge valve
• Damage to rotor seal and/or stator head
Outlet valve not properly assembled
• Re-tighten the outlet valve
• Check the position of the gold seal
Air in the primary pump chamber
• Check for air in the solvent inlet lines and the Tuning signal
• Purge the lines, condition and if necessary prime the pump head
Abort due to over pressure
• Check solvent and solvent settings
• Purge and condition the pump head with water
Leak in inlet valve
• Check for moving air bubbles in tubing directly to the inlet valve
• Purge the lines with water to remove dirt
• Knock at the valve, clean it or replace it
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