Thermo Scientific Dionex Easion, Operator'S Manual

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Dionex Easion Operator’s Manual
52
Doc. 155028-01 08/20
4.2 Liquid Leaks
•
Leaking fitting
Locate the source of the leak. Tighten or, if necessary, replace the liquid line
connection (see
Section 5.2 ). For tightening requirements, refer to Installation
of Dionex Liquid Line Fittings (Document No. 031432).
•
Broken liquid line
Replace the line and fittings (see Section 5.2 ).
•
Blocked or improperly installed line
Check that the lines are not crimped or otherwise blocked. Also, if the
blocked line is a waste line, make sure it is not elevated at any point after it
exits the Dionex Easion. If a line is blocked, replace it (see
Section 5.2 ).
•
Loose pump check valve housing
Make sure the check valves are firmly seated in the pump head. If they are
not, tighten them carefully with an open-end wrench just until the leak stops.
•
Damaged pump piston seal
1. Replace the piston seal (see Section 5.8 ).
2. If the problem persists, replace the piston (see Section 5.9 ).
•
Pump head not tight
Carefully tighten the pump head mounting screws just until the leak stops.
DO NOT OVERTIGHTEN!
•
Leaking pressure transducer
Check that the liquid line connections into the pressure transducer are tight.
Refer to
Installation of Dionex Liquid Line Fittings (Document No. 031432)
for tightening requirements. Replace any damaged fittings.
•
Leaking pump head waste valve
1. Make sure the waste valve is closed. To close the valve, turn the knob
clockwise, just until tight. DO NOT OVERTIGHTEN! Overtightening
may damage the valve and the pump head.
2. Inspect the pump head. If the waste valve is the source of the leak, replace
the waste valve seal (see Section 5.10 ).