Operating instructions

12 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 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.
12.1 Faults without a fault alert
Fault description Cause Remedy Personnel
Green LED indicator (operating indi‐
cator) does not light up
The wrong mains voltage or no
mains voltage is connected.
The specified mains voltage can
be found on the nameplate.
Electrician
Fault description Cause Remedy Personnel
The optical diaphragm rupture
sensor has triggered.
The operating diaphragm of the
metering diaphragm has ruptured.
Replace the
metering diaphragm.
Technical per‐
sonnel
WARNING!
Warning of escaping feed chemical
When metering critical or combustible feed chemicals or in
hazardous locations, under no circumstances must the
second diaphragm also rupture.
– If the pump membrane rupture sensor triggers, stop the
pump immediately and only restart once a new multi-
layer safety diaphragm is fitted.
Safety information
Faults without a fault alert
Troubleshooting
61