15 Troubleshooting
WARNING!
Warning of dangerous or unknown feed chemical
Should a dangerous 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 (e.g. safety glasses, safety gloves, ...).
Observe the safety data sheet for 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 components if
they are manipulated or opened due to pressure in the liquid
end and adjacent parts of the system.
– Disconnect the pump from the mains power supply and
ensure that it cannot be switched on again by unauthor‐
ised persons.
–
Depressurise the system before commencing any work
on hydraulic parts.
WARNING!
Fire hazard with flammable media
Only with combustible media: These may start to burn when
combined with oxygen.
– During filling and draining of the liquid end, an expert
must ensure that feed chemical does not come into con‐
tact with oxygen.
15.1 Faults Without a Fault Message
Fault description Cause Remedy Personnel
Pump does not prime in
spite of full stroke motion
and bleeding.
Minor crystalline deposits
on the ball seat due to the
valves drying out.
Take the suction hose out of the storage
tank and thoroughly flush out the liquid
end.
Technical per‐
sonnel
Serious crystalline deposits
on the ball seat due to the
valves drying out.
Dismantle the valves and clean them -
refer to the "Repair" chapter.
Technical per‐
sonnel
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 the "Repair" chapter
for the tightening torque.
Instructed per‐
sonnel
The diaphragm is not leak-
tight.
Replace the diaphragm - refer to the
"Repair" chapter.
If a diaphragm rupture has been indicated,
clean the diaphragm rupture indicator -
refer to the "Repair" chapter.
Technical per‐
sonnel
Green LED display (oper‐
ating indicator) does not
light up.
The wrong mains voltage
or no mains voltage is con‐
nected.
The specified mains voltage as per the
voltage specification can be found on the
nameplate.
Electrician
Safety information
Faults without a fault message
Troubleshooting
73
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