8 Trouble-shooting
Submersible mixer does not generate flow
Insufficient flow
Excessive current/power consumption
Vibrations and noise during mixer operation
A B C D Possible cause
Remedy
5)
X
Wrong direction of rotation
Check electrical connection.
X
Unfavourable installation of submersible
mixer
Check installation – Check the flow area for obstacles
and remove.
X X Propeller covered in solids; density of fluid
handled is too high
Clean the propeller, check power data.
X
X Propeller damaged
Replace the propeller
X X X Wear of internal parts
Replace worn parts by new ones.
X X X Wrong direction of rotation
If the mixer is running in the wrong direction of
rotation, check the electrical connection of the mixer
and the control system, if necessary.
X
Supply voltage is too low.
Check mains voltage; check electrical cable
connections
X
Motor is not running because of lack of
voltage
Check electrical installation, inform electric utility
company.
X X
Motor is running on two phases only.
Replace the defective fuse. Check the electrical cable
connections.
X
Motor winding or electrical cable are
defective
Replace with original KSB parts or contact KSB.
X X Defective radial bearing in the motor
Contact KSB.
X X
In case of star-delta configuration: Motor
running in star configuration only
Check star-delta contactor.
X
X Water level lowered too much during
operation
Check supply and capacity of system, check level
control equipment.
X
The temperature switch monitoring the
winding has tripped because of excessive
temperature rise in the winding
Overhaul the submersible mixer.
X
Leakage relay has tripped
Moisture in the motor
Overhaul the submersible mixer.
A
B
C
D
5)
Disconnect the submersible mixer from the power supply
8 Trouble-shooting
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Amamix
