AL-KO 112 449, Instructions For Use Manual

Page: 17 / 140

Troubleshooting
477 218_b 17
TROUBLESHOOTING
CAUTION!
Before you attempt to remedy any malfunction of your domestic water system, pull the plug to
prevent injury or death due to electrocution!
Fault Cause Solution
Impeller is blocked. Clean the pump.
Thermal switch has switched
off.
Wait until the thermal switch has
automatically switched the pump
on again. Check the tempera-
ture of the liquid. Have the pump
checked.
Motor does not run.
No power. Have the power supply checked
by a qualified electrician.
Suction hose is not immersed in
the liquid to be pumped.
Make sure that the suction hose
is at least 30 cm beneath the
surface.
Suction hose is blocked. DANGER! Risk of injury due to
hot water! Clear blockage in suc-
tion hose.
Pressure line is blocked. DANGER! Risk of injury due
to hot water! Clear blockage in
pressure line.
Suction height is too great. Lower suction height.
Pump sucks air Check all connection hoses and
filter cover for tightness.
System runs but does not pump
out liquid.
Pump is dry. Fill the pump with water.
Suction hose is blocked. Clear the blockage.
Suction height is too great. Lower suction height.
Pressure hose diameter is too
small.
Attach a pressure hose with a
larger diameter.
System is only pumping out li-
quid very slowly or weakly.
Pumping height is too great. Lower pumping height.
Pump does not run reliably. Air pressure in reservoir is too
low.
Check the air pressure in the
reservoir at the valve (5) and
correct to about 1.5 bar if ne-
cessary.
Pump fails to switch off automa-
tically
Water shortage inlet side,
Pump sucks in air
Unplug the pump, allow to cool
down if necessary