Possible cause

Solution

Leak in the system

Follow the troubleshooting steps in Liquid Leaks.

Pump waste or priming valve open

Close the valve by turning the valve knob clockwise until finger-tight. Do not overtighten! Overtightening may damage the valve and the pump head.

Flow rate is set to 0

Set the flow rate from the Inuvion ePanel.

Eluent valve is closed

Turn on the pump from the Inuvion ePanel.

Pump not primed

Prime the pump (see Prime the analytical pump).

Broken pump piston

Replace the piston (see Remove and replace the pistons, analytical pump seals, and O-rings).