Caution!
Unsuitable tools!
► Make sure that all the parts can be mounted without damage.
► Use GEA Hilge assembly tools.
10.3
Malfunctions and remedies
Actions for troubleshooting
Malfunction
Cause
Remedy
Pump does not
deliver or pump
delivers with
inadequate
power.
1.
Incorrect electrical connection (2 phases).
2.
Incorrect direction of rotation.
3.
Air in suction line or pump.
4.
Back pressure too high.
5.
Suction head too high, NPSH system (supply) too
low.
6.
Lines clogged or foreign bodies in the impeller.
7.
Air inclusion due to defective seal.
1.
Check electrical connection, and correct if
necessary.
2.
Change phases of power supply (swap motor
poles).
3.
Vent and prime suction pipe or pump.
4.
Reset operating point according to the data sheet.
Check system for contamination.
5.
Raise suction side liquid level, fully open the stop
valve in the suction line.
6.
Open pump and eliminate malfunctions.
7.
Check and, if necessary, replace pipe seals, pump
housing seals and shaft seals.
Motor protection
switch turns off,
motor is
overloaded.
1.
Pump is blocked due to clogging.
2.
Pump is blocked by contacting due to strain on the
pump body via the piping. (Check for damage.)
3.
Pump runs beyond its rated operating point.
4.
The fluid density or viscosity of the liquid is higher
than stated in the order.
5.
Motor protection switch is not set properly
6.
Motor runs on 2 phases.
1.
Open pump and eliminate malfunctions.
2.
Install pump without strain, support piping by fixed
points.
3.
Adjust operating point according to data sheet.
4.
If a lower power than specified is sufficient, reduce
the flow rate on the pressure side: otherwise use a
more powerful motor.
5.
Check the setting, replace the motor protection
switch if necessary.
6.
Check electrical connection, replace defective fuse.
Pump causes too
much noise.
Pump runs
unevenly and
vibrates.
1.
Suction head too high, NPSH system (supply) too
low.
2.
Air in suction line or pump.
1
3.
Back pressure is less than indicated.
4.
Impeller is unbalanced.
5.
Worn internal parts.
6.
Pump is strained (start-up noise - check for
damage.)
7.
Bearings are damaged.
8.
Bearings have too little, too much or inappropriate
lubricant.
9.
Motor fan defective.
10. Foreign material in the pump.
1.
Raise suction side liquid level, fully open the stop
valve in the suction line.
2.
Vent and prime suction pipe or pump.
3.
Adjust operating point according to data sheet.
4.
Clean, check and balance the impeller.
5.
Replace parts.
6.
Install pump without strain, support piping by fixed
points.
7.
Replace bearings.
8.
Add, reduce or replace lubricants.
9.
Replace the fan motor.
10. Open and clean the pump (for self-priming pumps,
install a screen if necessary).
Malfunctions / repairs
Malfunctions and remedies
BA.H2A.KYY.001.GB_2
44
27.02.2018
