Troubleshooting 3-27
Rheodyne injector valve
The table below addresses Rheodyne injector symptoms that can occur during
operation.
Waters autoinjector
The table below lists autoinjector symptoms that can arise while operating a
Waters autoinjector. Refer to the documentation that accompanies your
autoinjector for additional troubleshooting information and service
procedures.
Tip: Replace both the needle and seal pack at the same time, because needle
seal-pack sets are individually matched for optimal performance.
Rheodyne injector troubleshooting
Symptom Possible cause Corrective action
Leakage Stator screws need
tightening
Tighten stator screws;
replace rotor seal.
Scratches on rotor seal Replace rotor seal.
Needle seal leakage Syringe needle smaller
than needle seal
Try another syringe
needle; gently push on
plastic needle guide to
deform PTFE sleeve to
provide a better needle
fit.
Plugged valve passages Unfiltered solvent or
sample
Remove the stator and
clean the passages with
a small wire (0.015-inch
maximum diameter).
Autoinjector troubleshooting
Symptom Possible cause Corrective action
Leak at seal pack Damaged needle, seal
pack
Replace needle and seal
pack.
Cannot maintain high
or low pressure
Leak at needle, seal
pack
Replace needle and seal
pack.
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