Installation Instructions UFK 1.1100 Ex
KNF Flodos UFK1.1100Ex O&M-Rev2
20
7 Rectifying transfer problems
Symptom
Cause
Remedy
Pump does not
work; no movement
or sounds are de-
tectable.
No or incorrect control
Check that voltage and signal form comply
with the specification.
Pump does not
work; drive be-
comes very hot.
Motor is controlled with an
incorrect signal.
Check that voltage and signal form comply
with the specification.
The pump does not
prime, or vacuum is
insufficient.
External valve is closed.
Check external valve.
Counterpressure on pres-
sure side is too high.
Change the pressure conditions on the
pressure side.
Particles in the pump head Rinse the pump head.
Use a preventive preliminary filter.
Pump does not
transfer.
External valve is closed, or
filter is clogged or too small.
Check external valves and filter.
Connections or hoses are
blocked.
Check connections and hoses.
Remove blockage.
Flow rate is insuffi-
cient or unstable.
Incorrect control
Check that voltage and signal form comply
with the specification.
Cross-section of hydraulic
hoses or connectors too
narrow or restricted
Disconnect the pump from the system and
determine performance data.
Remove restriction (e.g. valve), if neces-
sary.
If applicable, use larger-diameter hoses or
connectors.
Higher counterpressure in
the system than assumed
for the design
Contact KNF representative.
Particles in the pump head Rinse the pump head.
Use a preventive preliminary filter.
Replace pump head.
Pump has reached the end
of its service life.
Replace the pump.
Leak on pump head Damage to the valve O-
rings
Replace the O-rings.
Diaphragm damaged
Replace the diaphragm.
Resonating diaphragm
damaged
Replace resonating diaphragm.
If the malfunction cannot be rectified, contact your local KNF
representative (
www.knf.com
).
Summary of Contents for UFK 1.1100 EX
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