Troubleshooting 4-27
Troubleshooting error messages and pump malfunctions
The table below is a guide to troubleshooting pump problems. It lists pump
error messages and pump-related symptoms and their possible causes, and
suggests corrective actions.
Troubleshooting error messages and pump malfunctions
Symptom Possible cause Corrective action
Error message on
the display reads:
Hi Press
Pump flow rate set too
high
Set to correct flow rate.
HPL set too low Set HPL to correct value.
Blocked column Clean column per column care
and use manual.
Viscous eluents in use Check eluent viscosity (the
observed pressure may be normal
for the column/eluent blend). If
necessary, change to less viscous
eluent.
Defective pressure
transducer
Contact Waters Technical
Service.
Blocked outlet tubing or
fluid path (in pump
outlet, detector, column,
or injector)
Locate source of blockage. Clean
or replace tubing according to the
appropriate operator’s manual.
Ambient temperature
has changed
Stabilize operating temperature.
Error message on
the display reads:
Lo Press
Pump flow rate set too
low
Set to correct flow rate.
LPL parameter set too
high
Set LPL parameter to correct
value.
Eluent reservoir empty Fill reservoir.
Air in eluent lines Prime the pump (see “Priming
the pump” on page 3-15).
Incorrect eluent used Change to correct eluent.
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