Troubleshooting And Fault Elimination - Kessel GTF 50 Hz Series Instructions For Installation, Operation And Maintenance

9

Troubleshooting and fault elimination

To avoid property damage and personal injury during the elimination of faults on the pump, the following
points must be heeded:
• Only eliminate a fault if you have qualified staff i.e. the individual jobs must be carried out by trained specialists
e.g. electrical work must be done by a qualified electrician.
• Always secure the pump against being started up again unintentionally by disconnecting it from the mains
power supply. Take suitable precautionary measures.
• Ensure that the pump safety switch-off can be carried out by a second person at all times.
• Secure the moving pump parts so that no-one can become injured.
• Unauthorised changes to the pump are made at your own risk and absolve the manufacturer from any
warranty claims.
Pump does not start
Cause
Interruption in power supply, short-circuit or earth fault
on the cable and/or motor winding
Fuses, motor protection switch and/or monitoring
devices have tripped
Pump starts up, but motor protection switch trips shortly after operation starts
Cause
Thermal trigger on the motor protection switch is not set
properly
Increased current consumption due to larger drop in
voltage
2-phase running
Differences in voltages too great at the 3 phases
Incorrect direction of rotation
Impeller/propeller slowed by sticking, blockage and/or
solids, increased current consumption
Density of the medium is too high
Pump is running, but not pumping
Cause
No pumping medium available
Inlet blocked
Impeller/propeller blocked or slowed
Defective hose/pipe
Intermittent operation
Pump is running, the given operating values are not being met
V 1.0
Troubleshooting and fault elimination
Remedy
Have a specialist check the cable and motor and renew
these if necessary
Have a specialist check the connections and change them if
necessary. Have motor protection switch and fuses installed
according to the technical specifications, reset monitoring
devices.
Check impeller/propeller for smooth running and clean and/or
make serviceable again
Remedy
Have a specialist compare the setting of the trigger with the
techn. specifications and have them corrected if necessary.
Have a specialist compare the voltage values of the
individual phases and have the connection changed if
necessary
Have a specialist check the connection and correct if
necessary
Have a specialist check the connection and switchgear and
correct if necessary
Swap 2 phases of the mains cable
Switch the pump off, secure it against restart, make impeller/
propeller serviceable again and/or clean suction muff
Consult the manufacturer
Remedy
Open inlet for tank and/or gate valve
Clean feed pipe, gate valve, suction adaptor, suction muff
and suction strainer
Switch the pump off, secure it against restart, make impeller/
propeller serviceable again
Replace defective parts
Check the switchgear
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