- Error message on the 2695 LCD screen states "restriction missing" when performing adjust seals procedure or compression check.
- Alliance 2695.
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
- Change the component responsible for high system pressure; column, pin plug, or restrictor tubing.
- 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.
Part number for the optical switch is WAT270933.