Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual page 241

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b. Depending on the pressure, do one of the following:
• If the pressure is below the threshold of 10 bar, the solvent line is blocked.
Discontinue this troubleshooting procedure, and replace the solvent line that
connects port 6 of valve B to the flow sensor inlet.
c
• If the pressure is above the threshold of 10 bar, keep the pump running and go to
step 5.
5. To determine if valve B is blocked, do the following:
a. Remove the solvent line from port 1 of valve B, and monitor the pressure.
b. Depending on the pressure, do one of the following:
• If the pressure is < 10bar, valve B is blocked. Please contact product support.
• If the pressure is > 10bar, keep the pump running and go to
6. To determine if either the line that connects valve B to pressure sensor B is blocked or
pressure sensor B is blocked, do the following:
a. Remove the solvent line that connects valve B to pressure sensor B from
pressure sensor B, and monitor the pressure.
b. Depending on the pressure, do one of the following:
• If the pressure is < 10bar, the solvent line is blocked. Replace it.
• If the pressure is >20 bar, pressure sensor B is blocked. Replace it as described in
"Replacing a Pressure Sensor"
Troubleshooting a System Blockage
on page 89.
EASY-nLC 1200 Troubleshooting & Maintenance Guide
7
Troubleshooting
step 6.
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