2767 Sample Manager leaks from wash pass valve - WKB93575

SYMPTOMS

• Leakage from wash pass valve
• Headspace forms in the syringe

ENVIRONMENT

• 2767 Sample Manager
• 2525/2545 Binary Gradient Module
• ACQUITY UPLC ELS Detector
• 3100 Mass Detector

CAUSE

Clogged sample probe—the wash pass valve malfunctioned due to high pressure when expelling liquid from the syringe.

FIX or WORKAROUND

1. Replace the wash pass valve (700002120).
2. Select Waters 2767 > Prime System in Inlet Editor and confirm that there is no leakage in the flow path and no head space in the syringe.

ADDITIONAL INFORMATION

https://support.waters.com/KB_Inst/Mass_Spectrometry/WKB88971_2767_not_injecting_the_correct_volume

https://support.waters.com/KB_Inst/Purification_SFx/WKB14782_2767_Syringe_Command_Overflow