11
M
ALFUNCTIONS
Before you attempt to remedy any malfunction of your pump, pull the plug to prevent injury or death
due to electrocution!
What is wrong?
Submersible pump runs
but is not pumping out
liquid.
What is the possible reason?
Impeller is blocked.
How to remedy the malfunction:
GB
Submersible pump is only
pumping out liquid very
slowly or weakly.
If you are unable to remedy a malfunction, please call the AL-KO service centre nearest you.
Motor does not run.
Remove blockage in inlet area. Clean
the impeller with a jet of water.
Thermal switch has switched off.
No power.
Have a qualified electrician check the
power supply.
Air is trapped in the pump housing.
Tilt the pump to let the trapped air out.
Suction slots are blocked.
Remove blockage and clean suction
slots.
Pressure line is blocked.
Clear blockage in pressure line.
Pressure hose is bent.
Straighten out pressure hose.
Hose diametre is too small.
Attach a hose with a larger diametre.
Suction slots are blocked.
Remove blockage and clean suction
slots.
Pumping height is too great.
Liquid is too dense.
Lower pumping height.
The liquid cannot be pumped.
Float switch does not work even
though liquid is above cut-in level.
Send pump to your nearest AL-KO
service centre.
Wait until the thermal switch has auto-
matically turned the pump on again.
Check water temperature. Have the
pump checked.
