Waters 1500-Series, Руководство оператора

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Troubleshooting pump problems 6-7
Erratic flow
rate/pump
pulsations
(continued)
Dirty or malfunctioning
check valve(s)
Try to isolate the problem.
Varying pressure/flow usually
indicates an outlet check valve
problem. Try loosening, and
then retightening the check
valve to dislodge any stuck
particles. Often, a sticking
check valve is resolved by
letting the pump run for a few
minutes at pressure. If there is
no flow from one head, replace
the head’s inlet check valve.
(see page 5-14 ).
Inlet filter or inlet lines
blocked
Inspect lines for blockages.
Replace the inlet filter frit.
Pump plunger seal
leaking (under pump
head)
Replace pump plunger seal
(see page 5-6 ).
Worn pump plunger Replace the plunger (see
page 5-6 ).
Immiscible eluents in
pump head
Refer to the Corrective Action
under the "Pump not
delivering eluent" symptom
listed above.
Pump cavitation Refer to the Corrective
Action(s) under the “Pump not
delivering eluent” symptom
listed above.
Pump electronics
failure
Contact Waters Technical
Service.
High system
pressure due to
pump
Pump Flow parameter
set too high
Set the correct flow parameter
value.
Pressure transducer
out of adjustment or
defective
Contact Waters Technical
Service.
Determining pump malfunctions (Continued)
Symptom Possible cause Corrective action