8.4 Frequent starts and stops.
Cause Remedy
The float switch has not been adjusted correctly. Adjust the float switch to ensure suitable time between
the cutting-in and cutting-out of the pump.
The non-return valve is leaking or stuck half-open. Clean or replace the non-return valve.
The supply voltage is unstable. Check the power supply.
The motor temperature is too high. Check the water temperature.
The pump is blocked. Check and clean the pump.
1. Switch off the power supply to the pump.
2. Remove the screws at the bottom of the pump with
a cross-head screwdriver.
3. Remove the pump base.
4. Clean the inlet strainer and hydraulic parts with a
brush and a water jet.
5. Reassemble the pump.
Leakage in the pipes. Check and repair the pipes.
Related information
3.1.2 Highest tapping point for SBA pumps
8.5 Leaking water from the drain holes
Cause Remedy
The water is drained from the drain holes
located under the red ring when the pump is stopped
and the drain holes are above water level.
• This is normal behaviour.
Related information
4. Starting up the product
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