WARNING!
Only motors with a frequency converter: Danger of elec‐
tric shock
The danger of electric shock remains for 3 minutes after
the mains voltage has been switched off on conducting
parts of the motor with an integrated frequency converter
and on the lines themselves.
– After switching off, allow the device to stand for 3
minutes before opening the terminal box.
CAUTION!
Only motors with a frequency converter: The motor can
be damaged
The input current limiter could be damaged if a motor
with an integrated frequency converter is restarted within
3 minutes of the mains voltage being switched off.
– After switching off, allow the device to stand for at
least 3 minutes before restarting.
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.
– Disconnect the pump from the mains power supply
and ensure that it cannot be switched on again by
unauthorised persons.
–
Depressurise the system before commencing any
work on hydraulic parts.
Fault description Cause Remedy Personnel
Pump does not prime in spite of
full stroke motion and bleeding.
The valves are dirty or
worn.
Repair the valves - see chapter
entitled "Repair".
Technical per‐
sonnel
The feed chemical has par‐
ticles larger than 0.3 mm.
Install a suitable filter in the suction
line.
Technical per‐
sonnel
Pump does not reach high pres‐
sure rates.
The valves are dirty or
worn.
Repair the valves - see chapter
entitled "Repair".
Technical per‐
sonnel
The motor is wired incor‐
rectly.
1. Check the mains voltage and
mains frequency.
2. Wire the motor correctly.
Electrician
The mains voltage has
failed.
Eliminate the cause. Electrician
Fluid is escaping from the back‐
plate.
The dosing head screws
are no longer tight enough.
Tighten the screws crosswise to the
specified tightening torque.
Technical per‐
sonnel
The diaphragm leaks.** Replace the diaphragm - refer to
the "Repair" chapter.
Technical per‐
sonnel
Large leaks occur at the relief
valve.
The ball or ball seat are
dirty or worn.
Clean or replace the ball and ball
seat.*
Technical per‐
sonnel
The diaphragm rupture sensor
has triggered.
The operating diaphragm
has ruptured.**
Replace the diaphragm - refer to
the "Repair" chapter.
Technical per‐
sonnel
Tasks
Troubleshooting
55
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