AL-KO HW 604 Manual De Instrucciones página 17

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