Possible cause

Solution

Leaking fitting

Locate the source of the leak. Tighten any tubing fittings or connections and replace them as needed (see Replace tubing and fittings).

Broken liquid line

When replacing tubing and fittings, the replacements must be of the same length and internal diameter (see Replace tubing and fittings).

Blocked or improperly installed line

Make sure that no tubing is crimped or blocked. For blocked waste tubing, verify that it is not elevated at any point after it exits the Dionex Inuvion IC System. Waste tubing lines use gravity to drain into the waste container. Replace any blocked tubing. For more information, refer to the suppressor manual.

Loose pump check valve

Procedure

  1. Verify that the check valves are firmly seated in the pump head. If necessary, tighten the check valves carefully with an open-end wrench just until the leak stops.
  2. If the leak persists, replace the check valve (see Replace the pump check valves).

Leaking seal wash port

Leaking from the seal wash port indicates a leaking piston seal. Replace the seal (see Remove and replace the pistons, analytical pump seals, and O-rings).

Damaged pump piston seal

Procedure

  1. Replace the piston seal (see Remove and replace the pistons, analytical pump seals, and O-rings).
  2. If the leak persists, replace the piston (see Remove and replace the pistons, analytical pump seals, and O-rings).

Pump head not tight against casing

Carefully tighten the pump head mounting nuts just until the leak stops. Do not overtighten!

Leaking pressure transducer

Procedure

  1. Verify that the pressure transducer tubing and fitting connections are tight. For tightening requirements, see Replace tubing and fittings. Replace any damaged tubing or fittings.
  2. If the pressure transducer continues to leak, contact Thermo Fisher Scientific Technical Support for assistance.

  3. NOTE

    Service on internal electronics of the Dionex Inuvion IC System and accessories must be performed by Thermo Fisher Scientific service engineers.

Leaking pump head priming valve

Procedure

  1. Verify that the priming valve is closed. To close the valve, turn the knob clockwise and tighten finger-tight. Do not overtighten! Overtightening may damage the valve and the pump head.
  2. If the leak persists, replace the priming valve O-ring (see Remove and replace the pistons, analytical pump seals, and O-rings).

Leaking suppressor

Refer to the suppressor manual for troubleshooting procedures.

Leaking injection valve or auxiliary valve

Procedure

  1. Verify that the liquid line connections to the transducer are tight. For tightening requirements, see Replace tubing and fittings.
  2. If the leak is from behind the valve stator, the rotor seal may be scratched. Rebuild the valve (see Rebuild the injection valve or auxiliary valve.

Leaking detector cell

Procedure

  1. Check for blockage in the waste line; trapped particles can plug the lines and cause a restriction and/or leak. If necessary, clear the waste lines by reversing the direction of flow.
  2. Verify that the plumbing downstream from the cell is clear; a blockage may overpressurize the cell, causing a leak.
  3. If the problem persists, contact Thermo Fisher Scientific Technical Support for assistance.

  4. NOTE

    Service on internal electronics of the Dionex Inuvion IC System and accessories must be performed by Thermo Fisher Scientific service engineers.