Plunger Errors; Procedure - Agilent Technologies 7890 Series Troubleshooting Manual

2
ALS and Detector Symptoms

Plunger Errors

Procedure

18
If the ALS reports a front or back plunger error, check the
following possible causes:
• The syringe plunger is sticking or is not securely connected
to the plunger carrier.
• The plunger solenoid is binding.
• The plunger carrier encoder is inoperable.
• The autoinjector plunger carrier mechanism will not move.
• The plunger does not move freely due to sample residue or
wear. Install a new syringe, making sure to prime the syringe
with solvent before installing.
1
Remove the syringe and check it for plunger stickiness or
binding. Replace the syringe if necessary (7693A, 7650A,
7683).
2
Check the viscosity of the sample against the viscosity
parameter. Reset the viscosity parameter if necessary.
3
Restart the sequence.
4
If the error occurs again, obtain Agilent service.
Agilent 7890 Series Troubleshooting