3-26 Troubleshooting, Testing, and Maintenance
Injector troubleshooting
Before using the troubleshooting tables in this section, use those that appear
earlier in the chapter to identify the part of the system in which the problem
originates.
Erratic flow/pump
pulsations
Gas dissolved in mobile
phase
Sparge solvents.
Air bubble in pump
head
Prime pump to remove
bubble.
Dirty check valve(s) Clean check valve(s).
Faulty check valve(s) Replace check valve(s).
Plugged solvent
reservoir filter
Clean or replace the
filter.
Kinked or bent tubing Remove bend from
tubing. If symptoms
continue, replace
tubing.
Leaky plunger seals Replace seals.
Broken plunger Replace damaged
plunger.
Defective solvent
proportioning valve
Call WatersTechnical
Service.
Squeak Pump seals not wetted Prime pump.
Binding plunger seal Replace plunger seal
assembly.
Pump troubleshooting (Continued)
Symptom Possible cause Corrective action
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