Troubleshooting A Pump That Fails The Leaks Script - Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual

Troubleshooting a Pump That Fails the Leaks Script

Thermo Scientific
Follow this procedure to determine why the pump failed the Leaks script.
Note For information about running the Leaks script see
Value column on the Parameters page of the Leaks script, select A to test pump A or B to
test pump B.
This procedure systematically checks whether the following problems caused the Leaks script
failure:
• Excess air in the system
• Tubing connections between the pump and the pressure sensor
• Tubing connections between pressure sensor and the valve
• A worn piston seal (in the pump head
CAUTION Wear powder-free gloves and safety glasses when handling parts of the LC system
that come into contact with solvents.
❖ To troubleshoot a pump that has failed the Leaks script
1. Run the Flush Air script for the failed pump (see
Enter 12 µL for the Flush Volume parameter.
2. Do one of the following:
• If the Output page reports one of these messages, go to
That Fails the Flush Air Script"
– Aborting unable to build pressure
– Aborting check solvent level
• If the script passes, go to
3. Run the Leaks script for the failed pump or both pumps (see
• If the Leaks script fails, the leak is either in the pump, the valve, or the connecting
lines or fittings. Go to
• If the Leaks script passes, excess air in the system was the source of the problem.
Troubleshooting a Pump That Fails the Leaks Script
"Flush Air"
on page 174.
step 3.
step 4.
EASY-nLC 1200 Troubleshooting & Maintenance Guide
7
Troubleshooting
"Leaks" on page 44. In the
on page 33).
"Troubleshooting a Pump
"Leaks" on page 44).
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