Faults in a pump installation can have various causes. The fault may not be in the pump, it may also be caused by the pipe system or the operating conditions. Firstly, always check that installation has been executed in accordance with the instructions in this manual and that the operating conditions still correspond with the specifications for which the pump was purchased. In general, breakdowns in a pump installation are attributable to the following causes:

• Faults with the pump.
• Breakdowns or faults in the pipe system.
• Faults due to incorrect installation or commissioning.
• Faults due to incorrect choice of pump.

A number of the most frequently occurring failures as well as their possible causes are shown in the table below.