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OPERATING AND MAINTENANCE MANUAL
LKS SERIES SUBMERSIBLE ELECTRIC PUMP
•
Do not expose to frost.
ENG
•
Avoid dry operation.
•
Do not abuse the cable. Never use the cable to carry, pull or unplug the pump.
•
Clean the pump regularly if the suctioned liquid produces sediment.
•
Avoid knocks, do not drop the pump.
6. PROBLEM SOLVING
PROBLEM
The engine
does not start
and makes no
noise.
Pump does
not deliver the
required flow
rate.
Pump stops
suddenly
The flow
decreases.
Low or insuffi-
cient flow
POSSIBLE REASONS
Is the pump clogged and does the pump
start when fully submerged?
Does the impeller rotate and is it in good
condition?
Is the pump inlet free?
Does the requested delivery head
exceed the pump requirements or is the
discharge pipe too narrow?
Are you sure that the pump inlet is not
clogged?
Does the mains power match the rating
plate?
Is the liquid temperature below 35°C?
Is the pump inlet clean and is the impe-
ller clean?
Are you sure that the pump inlet is not
clogged?
Is the impeller clean?
Are you sure that the outlet pipe is not
clogged? Is the diameter of the dischar-
ge pipe sufficient?
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SOLUTION
Check your electrical installation.
Check that the float can move freely.
Eliminate the reason for the blockage.
Replace impeller. Clean the pump inlet.
Use the pump according to its technical
capabilities.
Increase the pipe diameter.
Disconnect the pump from the mains and let it
cool down for a few tens of minutes.
Clean the pump inlet.
Use a power supply that matches the name-
plate.
Observe the maximum permissible tempera-
ture.
Clean the area(s) in question.
Clean the area(s) in question and check the
check valve, if applicable.
Connect a pipe with a suitable diameter and
eliminate the reduction of the water flow.
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