39
© Lutz-Jesco GmbH 2020
Subject to technical changes.
200318
BA-10491-02-V01
Piston diaphragm dosing pump
MEMDOS KMS LB/LA
Operating instructions
13.1.7 Loud noises on the dosing pump
Possible cause
Remedy
Roller bearing defective
è
Contact the manufacturer.
Tab. 36: Type of fault: Loud noises on the dosing pump
13.1.8 The drive is overloaded
Possible cause
Remedy
Shut-off valves closed
è
Open the shut-off valves. Inspect
the dosing pump for possible
damage.
The drive motor's electrical
data does not match that of
the mains supply
è
Check the electrical installation.
Pressure peaks due to
acceleration with long suction
lines
è
Install a suction pressure
regulator.
System backpressure too
high (measured at discharge
connection of dosing pump)
è
Clean blocked injection nozzle.
è
Install pulsation dampeners to
reduce pressure peaks if pipes
are too long.
è
Check function of safety valves.
Tab. 37: Type of fault: The drive is overloaded
13.1.9 Motor hums and does not start.
Possible cause
Remedy
The drive motor's electrical
data does not match that of
the mains supply
è
Check the electrical installation.
System backpressure too
high (measured at discharge
connection of dosing pump)
è
Clean blocked injection nozzle.
è
Install pulsation dampeners to
reduce pressure peaks if pipes
are too long.
è
Check function of safety valves.
No or insufficient oil in the
gearbox
è
Fill up the gearbox oil.
Tab. 38: Type of fault: Motor hums and does not start.
14 Spare parts
Required set for a complete service:
n
One diaphragm spare parts kit including hose diaphragm and one set
of O-rings
Further spare parts
n
Dosing valves
n
Safety valves
