MAGDOS
BW 1 02 98 / 12
Lutz-Jesco GmbH
Improved changes are always reserved without notice.
NATURE OF PROBLEM
POSSIBLE CAUSE
RECOMMENDED ACTION
Pump not delivering or
Valves leaking or blocked.
Clean valves and bleed pump.
output too low.
See also start-up of pump
BW 1 02 98 / 4.
Valves incorrectly installed.
Reassemble valves.
Ensure that valve balls
are located above valve
seats.
Suction valve or suction line
Clean and seal suction line.
leaking or blocked.
Suction lift too high.
Install pump at lower position.
Install pulsation dampener on
suction side.
Install priming aid.
Viscositiy too high.
Install spring-loaded valves.
Enlarge line cross-section.
Use special metering head.
-----> Contact JESCO.
No stroke movement
Pump set to zero stroke.
Correctly adjust pump stroke.
observed.
Diaphragm return spring broken.
Replace spring.
Fuse blown, LEDs off.
Check power supply line,
replace fuse (section 14).
Solenoid defective.
Check coil resistance and isolation;
replace solenoid, if required.
Red low liquid level
Feed tank empty; level control or
Fill tank or check suction line.
indication LED on.
dummy plug incorrectly inserted.
Frequent diaphragm
No support plate.
Replace diaphragm with support
failures.
ATTENTION!
plate. When replacing diaphragm,
Not all diaphragms are supplied
check if deflector plate or diaphragm
with support plate (acc. to spare
rod have been corroded by pumped
parts list). See section 8, "Replacing fluid.
the diaphragm", BW 1 02 98 / 4.
Diaphragm was not screwed
Screw in new diaphragm as far as
into the diaphragm rod as far
stop. Support plate must then be
as stop.
clamped between diaphragm and
diaphragm rod.
Back pressure to high
Check system. Clean blocked
(measured at discharge
injection nozzle. Reduce pressure
connection of pump).
peaks resulting from extremely
long tubes by installing pulsation
dampeners.
Media sediment in
Flush metering head.
metering head.
Pump delivering too much.
Pressure on suction side too high.
Install back pressure valve
(Pump siphoning).
in discharge line.
Stroke stop shifted.
Readjust stop (see item 10).
Stroke frequency too high.
Reduce frequency.
If the problem cannot be corrected on the basis of the above data, return the pump to the factory or contact our After-
Sales Service for further measures. Repairs will be carried out immediately.
15. Troubleshooting
