6. Fault finding the product
DANGER
Electric shock
Death or serious personal injury
‐ Before starting any work on the
product, make sure that the power
supply has been switched off and that
it cannot be accidentally switched on.
6.1 The motor does not start when the level
in the tank reaches the start level
Cause Remedy
Supply failure.
• Reestablish the power
supply.
The impeller is stuck.
The thermal switch
has tripped.
• Free the impeller, and
wait until the motor is
cooled down and the
thermal switch has
reset.
6.2 The motor hums but does not operate
Cause Remedy
The impeller is stuck.
• Free the impeller and
check that it can rotate
freely.
The motor or
capacitor is defective.
• Replace the motor or
capacitor.
6.3 The motor runs continuously or at
irregular intervals
Cause Remedy
Water is leaking from
the inlet into the tank.
• Check for leaking
appliances.
Water is leaking back
into the tank from the
outlet pipe.
• Check the non-return
flap.
The float switch is
defective or stuck.
• Clean the float switch
unit or replace it, if
necessary.
6.4 The pump runs but does not deliver the
rated flow rate
Cause Remedy
The pump or tank is
blocked.
• Remove the blockage.
There is an air pocket
in the pump or the
vent hole in the pump
housing is blocked.
• Check operation of the
vent valve in the tank.
• Check that the carbon
filter is not wet.
• Check that the vent
hole in the pump
housing is not blocked.
The outlet port or pipe
is blocked.
• Remove the blockage.
• Check the non-return
flap.
6.5 The lifting station evacuates slowly
Cause Remedy
The outlet pipe is too
long or has an
excessive number of
bends.
• Increase the outlet
pipe size (maximum 40
mm).
• Change pipes to
reduce the number of
bends.
• Change bends to soft
bends.
The pump housing is
leaky.
• Replace the pump
housing (service part).
The hydraulics are
blocked.
• Check that the motor
shaft can rotate freely.
Remove the motor
flange to clean the
impeller.
9
English (GB)
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