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Help in case of malfunction
9 HELP IN CASE OF MALFUNCTION
DANGER! Danger of electric shock!
There is a risk of electric shock when working on
the pump.
■
Disconnect the mains plug before starting
any fault remedying work.
■
Faults in the electrical system must be recti-
fied by a qualified electrician.
Malfunction
Motor does not run.
Pump running but does not
feed.
Pump switches on and off
frequently.
Delivery rate too low.
10 STORAGE
1. Drain suction line (18) and pressure line (13).
467776_h
Possible cause
Impeller blocked.
Thermal protection switch has
switched off.
No mains power.
The suction line is not in the
water.
Pressure line closed off.
Pump drawing in air.
Blockage on the suction side.
Pump has been running dry.
Diaphragm is damaged.
Low air pressure in the storage
vessel.
Pump drawing air, water short-
age on suction side.
Blockage on the suction side.
Hose diameter too small.
Suction head too large.
Water volume on the suction
side to little
NOTE In the event of faults that you cannot
rectify, please contact our Customer Service de-
partment.
Remedy
Cleaning the pump. Release the mo-
tor shaft of the impeller with a screw-
driver.
Check the water level on the suction
side. Allow the conveying fluid to cool
down. Repair or replace the pump.
Check fuses, have the power supply
checked by a qualified electrician.
Submerge the end of the suction line
into the water by min. 30 cm.
Open the closing off devices in the
pressure line.
Check all connections and the cover
on the filter for leaks. Replace seal
ring.
Remove dirt from the suction area.
Fill the pump housing with water.
Have the diaphragm replaced by AL-
KO Service Department.
Top up the air in the storage vessel.
(Set the diaphragm pressure to 1.5
bar).
Switch pump off and allow to cool.
Remove dirt from the suction area.
Replace the filter.
Use a hose with a bigger diameter.
Reduce the suction head.
Throttle back the pump to adapt the
flow rate.
2. Unscrew filter chamber drain plug (10) and
allow the water to drain out of the pump. The
water in the storage vessel is forced out at
the same time by the air bellows.
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