Alliance 2695 Error: "Restriction missing" when running the adjust seals calibration - WKB6157

SYMPTOMS

• Error message on the 2695 LCD screen states "restriction missing" when performing adjust seals procedure or compression check.

ENVIRONMENT

• Alliance 2695.

CAUSE

High pressure and additional restriction (>2000 psi @ 1 mL/min) may cause this test to take longer and result in a "restrictor missing" error message.

FIX or WORKAROUND

1. Change the component responsible for high system pressure; column, pin plug, or restrictor tubing.
2. Adjust until you achieve a system pressure of less than 2000 psi when running at 1 ml/min. The bracket that holds the Optical Switch might need adjustment. There should be a gap of 5/16" between the top of the bracket and the injection tower.

ADDITIONAL INFORMATION

Part number for the optical switch is WAT270933.