Waters Prep Series Installation And Maintenance Manual page 112

Autoinjector troubleshooting (Continued)
Symptom
Reproducibility errors
Compression check
failed
3-28 Troubleshooting, Testing, and Maintenance
Possible cause
Syringe contains an air
bubble (usually seen at
the top of the syringe)
Leaks at the fluid
tubing connections
Seal pack failure
Syringe contains air
bubble (usually seen at
the top of the syringe)
Mobile phase not
properly degassed
Leaks at the fluid
tubing connections
High pressure limit on
PUMP SETUP screen
must be at least two
times compression
pressure
Parameters used for
Compression Check
unacceptable for solvent
Seal pack failure
Corrective action
Remove bubble.
Check for leakage at the
connections with the
corner of a tissue, and
tighten connection
slightly if the tissue is
moistened.
Replace seal pack.
Remove bubble.
Sparge mobile phase.
Check for leakage at the
connections with the
corner of a tissue, and
tighten connection
slightly if the tissue is
moistened.
Change pressure limit
on the PUMP SETUP
page; change pump flow
to adjust pressure.
Repeat the test using
default parameters on
Purge and
COMPressION test
screen. If the test fails
again, perform an
autocalibration and
repeat the test.
Replace seal pack.