11 Troubleshooting
WARNING!
Warning of hazardous or unknown feed chemical
Should a hazardous or unknown feed chemical be
used, it may escape from the hydraulic components
when working on the pump
.
– Take appropriate protective measures before
working on the pump (protective eyewear, protective
gloves, ...). Read the safety data sheet on the feed
chemical.
– Drain and flush the liquid end before working on the
pump.
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic compo‐
nents if they are manipulated or opened due to pressure
in the liquid end and adjacent parts of the system.
– Depressurise the system prior to undertaking any
maintenance or repair work!
11.1 Faults without Fault Alert
Error description Cause Solution Personnel
Pump does not
prime in spite of full
stroke motion and
bleeding
Minor crystal‐
line deposits
on the ball
seat
due to the
valves drying
out
Take suction tube out of the storage container and thor‐
oughly flush out the liquid end
Technical
personnel
Major crystal‐
line deposits
on the ball
seat
due to the
valves drying
out
Dismantle the valves and clean them - refer to "Repair" Technical
personnel
Fluid is escaping
from the backplate
The screws in
the dosing
head are too
loose
Tighten the screws in the dosing head crosswise - refer
to "Repair" for tightening torque
The
diaphragm is
not tight
Replace the diaphragm - refer to "Repair" Technical
personnel
Green LED indicator
(operating indicator
)
does not light up
The wrong
mains voltage
or no mains
voltage is
connected
Connect the pump correctly to the specified mains
voltage - according to the specification on the nameplate
Electrician
Safety information
Troubleshooting
35
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