BA series pumps
1401 Troubleshooting tables
10.1
10 Troubleshooting tables
WARNING
In the event of a malfunction or abnormal operation, shut off the pump or pump unit
immediately to prevent a dangerous situation and/or damage (possibly severe) to
the pump or pump unit.
Inform to responsible persons. Determine the cause of the malfunction. Resolve the
problem before restarting the pump.
10.1 Troubleshooting table – pump (general)
Problem Cause Possible solution
Pump does not
deliver any liquid
Incorrect direction of rotation Reverse direction of rotation
Vacuum pump does not draw a vacuum Inspect vacuum pump
Gas or air is released from the liquid Ensure that the liquid flows more slowly/
smoothly
Air pockets form in the suction line Eliminate air entrapment to the extent
possible
Inlet of the suction pipe is insufficiently
submerged
Submerge the suction line more deeply
Foreign object in the impeller Clean impeller
Insufficient lubrication Lubricate
Manometric suction height undercalculated Place pump higher, if possible
Otherwise: use a different type of pump
The suction height is too great or there is
too little difference between the geometric
height and the vapour tension of the liquid
(NPSH too low)
Place pump at a lower height
Otherwise: use a different type of pump
The suction pipe is clogged Clean
The pressure pipe is clogged Clean
There is a leak in the suction pipe Eliminate leak
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