User manual Pomac PLP Lobe pump
CE/PLP (1406) EN-12 63
10. Trouble shooting
A malfunction in a pump system may have various causes. The malfunction is not always
necessarily in the pump itself, but can also be caused by a malfunction in the piping system, or
in another appendage in the system. If the operating conditions differ too greatly from the
specifications by which the pump was purchased this can also cause malfunctioning.
Therefore always check first:
⚫ Has the pump been installed correctly?
⚫ Are the operating conditions still according to the initial specifications?
⚫ Are the other appendages in the pipe system functioning correctly?
⚫
In general terms, the following malfunctions in a pump can be distinguished:
1. pump gives no liquid
2. pump gives irregular liquid flow
3. capacity too low
4. pump overheats
5. motor overheats
6. excessive rotor wear
7. excessive wear of shaft sealing
8. pump vibrates excessively or makes too much noise
9. pump stops
10. pump comes to a stop at start-up
The table on the next page gives a possible cause and solution for the malfunctions mentioned
above.
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