ECP2050
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Problem
Caused by / Conditions
Solution
Bubbles.
Check all connections on
capillaries and tubing before,
in and after the pump.
Try to purge the pump again
and watch tubing after
connected mobile phase filter,
for bubble formation. If any
bubbles are formed there,
exchange/rinse this filter.
You can use degassing unit.
Bad check valve.
Try to replace check valve
(see
).
Impurity in check valve.
Purge it with air flow or insert
in ultrasound bath (see
).
Damaged seal
– esp. when
using solvents as Acetonitrile.
It may seem like that bubbles
are formed inside the pumping
system, it is convenient to
exclude other source of
bubbles using degasser.
The pump is not run-in
properly after seals
replacement.
Run-in the pump under optimal
conditions (see
).
Electronic failure.
Contact service center.
Flowrate is lower then set
value.
Pressure stability.
Problems with lower flow rate
occur and usually relate to
problems with pressure
stability
– see solution above.
Solution agent.
Solution agents with very high
or very low viscosity may
cause these problems. As well
as not degassed solvents.
Calibration
After eliminating above
mentioned reasons, proceed
automatical calibration
FLOW
AUTFLOW AUTO
).
Electronic failure.
Contact service center.
Motor works hardly/loudly,
there isn’t indicated any
pressure and flow rate is low
or none.
Clogged frit of outlet valve.
Only if check valves with frit
are used.
Check the frit, try to clean it or
replace the check valve.
Electronic/mechanic failure.
Contact service center.
Reporting of errors and
warnings (Wxx, Exx)
E24
–
PRESSURE PEAK
OVER SAFYTY LIMIT!
Operating error. Locate and
eliminate reason for pressure
escalation
– stuck column,
clogged frit behind the unit or
other, above mentioned.
E41
–
PRESSURE OVER
HIGH LIMIT
