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13
Troubleshooting
Before commencing all work
Safety information
WARNING!
Danger from hazardous substances!
Possible consequence: Fatal or very serious injuries.
Please ensure when handling hazardous substances
that you have read the latest safety data sheets provided
by the manufacture of the hazardous substance. The
actions required are described in the safety data sheet.
Check the safety data sheet regularly and replace, if
necessary, as the hazard potential of a substance can
be re-evaluated at any time based on new findings.
The system operator is responsible for ensuring that
these safety data sheets are available and that they are
kept up to date, as well as for producing an associated
hazard assessment for the workstations affected.
1.
Disconnect the pump from the power supply.
2.
Depressurise the pump.
3.
Use a suitable flushing medium to flush the pump, referring to the
material safety data sheet for the feed chemical.
ATEX pumps in areas at risk from explosion
Generally ensure that the parts are working properly (no leaks,
n
unusual noises, high temperatures, unusual smell ...) especially the
power end/drive and the bearings.
Do not allow the pump to run hot.
n
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 elimi‐
nate the cause.
Only use a moist cloth when cleaning plastic parts to avoid electro‐
n
static charge.
Replace wear parts, such as bearings, when there is an identifiable
n
incidence of unacceptable wear. The nominal service life cannot be
calculated with lubricated bearings.
WARNING!
Only motors with a frequency converter: Danger of elec‐
tric shocks
–
The danger of an electric shock remains for 3
minutes after the mains voltage has been switched
off on conducting parts of the motor with integrated
frequency converter and on the lines themselves.
–
After switching off, allow the unit 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 integrated frequency converter is
restarted within 3 minutes of the mains voltage
being switched off.
–
After switching off, allow the unit to stand for at least
3 minutes before restarting.
1.
Disconnect the pump from the mains power supply.
2.
Depressurise and bleed the hydraulic environment of the pump.
Troubleshooting
53
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