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Operating faults
8
Operating faults
Fault description
No dosing
Pump dosing too less
Dosing pump does not work
No suction by pump
Dosing head is leaky, medium
comes out through the
membrane breakage drain
417101113 Rev. 9-08.2019
Cause
Back pressure too high
Valve on the pressure side
closed
Motor overheated/defective
Suction line leaky
Back pressure too high
Mains cable damagedt
Wrong voltage
Sediments, sticking of the
valves
Diameter of suction-
respectively pressure hose is
to large (especial at version
with 20 l/h)
Dosing head is loose
Membrane is torn
32
Remedy
Reduce pressure
Open valve on the pressure
side
Allow motor to cool or replace
pump
Check suction line
Check back pressure
Change mains cable
Secure actuation
Flush out the dosing head over
the suction line; possibly also
remove valves and clean or
replace
Use smaller hose sizes. (e.g.
6/12 mm / version with 20 l/h)
Tighten dosing head fastening
screws diagonally
Replace pump
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