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12
Troubleshooting
Safety notes
12.1
Faults without a fault alert
Fault description
Pump does not prime in
spite of full stroke motion
and bleeding
Fluid is escaping from the
backplate
The CAN LED flickers after
connection of the HMI to
the pump.
Green LED display (oper‐
ating display) does not light
up
12.2
Fault alerts
Cause
Minor crystalline deposits on
the ball seat due to the
valves drying out
Major crystalline deposits on
the ball seat due to the
valves drying out
The screws in the dosing
head are too loose
The metering diaphragm is
not tight
The software versions of the
pump and HMI are different.
The wrong mains voltage or
no mains voltage is con‐
nected
Red LED "Fault indicator" lights up.
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.
Remedy
Take suction hose out of the storage tank
and thoroughly flush out the liquid end
Dismantle the valves and clean them - refer
to the "Overhaul" chapter.
Tighten the screws in the dosing head in a
diagonal pattern - refer to the "Repairs"
chapter for tightening torque.
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.
Wait. In the log term, arrange for service to
update the pump software.
Connect the pump correctly to the specified
mains voltage - according to the specification
on the nameplate.
Troubleshooting
Personnel
Technical
personnel
Technical
personnel
Technical
personnel
Electrician
75
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