13 Troubleshooting
WARNING!
ATEX pumps in areas at risk from explosion
– Generally ensure that the parts are working properly
(no leaks, unusual noises, high temperatures,
unusual smell ...) especially the power end/drive and
the bearings.
–
Do not allow the pump to heat up because of a lack
of oil!
With lubricated metering pumps, regularly check for
the presence of lubricant, for example by checking
the liquid level, visual leak control etc. If oil is
leaking, examine the leakage point immediately and
eliminate the cause.
– Only use a moist cloth when cleaning plastic parts to
avoid electrostatic charge.
– Replace wear parts, such as bearings, when there is
an identifiable incidence of unacceptable wear. (The
nominal service life cannot be calculated with lubri‐
cated bearings.)
– Only use genuine spare parts as replacements.
WARNING!
Fire hazard with flammable media
Only with flammable media: They can be ignited by
oxygen.
– The pump may not work if there is a mixture of feed
chemical with oxygen in the liquid end. A specialist
may need to take appropriate actions (using inert
gas, ...).
WARNING!
Danger of an electric shock
Personnel working on electrical parts can be electro‐
cuted if all electrical lines carrying current have not been
disconnected.
– Disconnect the supply cable before working on the
motor and prevent it from being reconnected acci‐
dentally.
–
Any separately driven fans, servo motors, speed
controllers or diaphragm rupture sensors fitted
should also be disconnected.
– Check that the supply cables are de-energised.
WARNING!
Warning of hazardous feed chemical
Should a dangerous feed chemical be used: it may
escape from the hydraulic components when working on
the pump, material failure or incorrect handling of the
pump.
– Take appropriate protective measures before
working on the pump (e.g. safety glasses, safety
gloves, ...). Adhere to the material safety data sheet
for the feed chemical.
–
Drain and flush the liquid end before working on the
pump.
Safety information
Troubleshooting
54
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