Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 197

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4. Check whether the pump can draw solvent through the tubing that connects the pressure
sensor to the rotary valve as follows:
a. Disconnect the solvent line from the rotary valve (see
• For pumps A or B, disconnect the solvent line from port 1 of the valve.
• For pump S, disconnect the solvent line from port 6 of the valve.
Figure 142. Rotary valve layout for the EASY-nLC 1200 instrument
b. Place the free end of the solvent line into a small vial that contains the appropriate
solvent. Use solvent A for pump A and solvent B for pump B.
c. Run the Purge Solvent script and check that solvent is being aspirated from the vial
into the pump.
For information about the Purge Solvent script, see
d. Depending on whether the pump aspirated the solvent, do one of the following:
• If the pump does not aspirate solvent from the vial, go to
• If the pump aspirates solvent from the vial, the problem is probably resolved. To
verify that the system is working, go to
e. Reconnect all of the solvent lines, and run the Flush Air script again.
f. Depending on the results of the Flush Air script, do one of the following:
• If the Flush Air script fails, go to
• If the Flush Air script passes, you have completed this troubleshooting procedure.
Troubleshooting a Pump That Fails the Flush Air Script
Port 6 of valve S
step
step 6 on
EASY-nLC 1200 Troubleshooting & Maintenance Guide
7
Troubleshooting
Figure 142).
Port 1 of valve A
Port 1 of valve B
"Purge Solvent" on page
step 5.
4e.
page 176.
32.
175