Potential Causes Of Pressure Test Failure - Agilent Technologies 1200 Series Reference Manual

3 Troubleshooting and Test Functions

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)
Purge valve open.
Loose or leaky fitting.
Damaged pump seals or plungers.
Loose purge valve.
Potential Cause (Autosampler)
Loose or leaky fitting.
Rotor seal (injection valve).
Damaged metering seal or plunger.
Needle seat.
Potential Cause (Column Compartment)
Loose or leaky fitting.
Rotor seal (column switching valve).
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Corrective Action
Close the purge valve.
Tighten the fitting or exchange the capillary.
Run the leak test to confirm the leak.
Tighten the purge valve nut (14 mm wrench).
Corrective Action
Tighten or exchange the fitting or capillary.
Exchange the rotor seal.
Exchange the metering seal. Check the plunger
for scratches. Exchange the plunger if required.
Exchange the needle seat.
Corrective Action
Tighten or exchange the fitting or capillary.
Exchange the rotor seal.
1200 Series QP Reference Manual