14 Troubleshooting
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.
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.
14.1 Faults without a fault alert
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 suction hose out of the storage tank and
thoroughly flush out the liquid end
Technical
personnel
Major crystalline deposits
on the ball seat due to the
valves drying out
Dismantle the valves and clean them - refer to
the "Overhaul" chapter.
Technical
personnel
Fluid is escaping from the
backplate.
The screws in the dosing
head are too loose
Tighten the screws in the dosing head in a
diagonal pattern - refer to the "Repairs"
chapter for tightening torque.
The diaphragm is not tight. Replace the diaphragm - refer to the "Over‐
haul" chapter.
If a diaphragm rupture has been indicated,
clean the diaphragm rupture reporter, refer to
the "Overhaul" chapter.
Technical
personnel
Green LED display (oper‐
ating display) does not
light up
The wrong mains voltage
or no mains voltage is con‐
nected.
Connect the pump correctly to the specified
mains voltage - according to the specification
on the nameplate.
Electrician
Safety notes
Troubleshooting
80
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