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Bianco Pumpz BIA-AUTOSUB User Manual
10. Trouble Shooting
Before inspecting the pump, disconnect the power supply (i.e. remove the plug from
the socket). If there is any damage to pump or power cable any necessary repairs or
replacements must be performed by the manufacturer or his authorised customer
support service, or by an equally-qualified technician.
Possible cause
Potential Solution
The motor does not
start and there is no
noise;
A. Check the power supply to the
pump;
B. Inspect check valve for correct
installation of blockage;
Check power supply fuses/circuit
breakers
Ensure that the check valve is
installed correctly and is not
blocked;
The pump will not
start correctly but
makes a noise
A. Possible partial blockage;
B. Capacitor failure
Pump flow rate is
poor
A. Clogged water inlet filter
B. Blocked or damaged impellers;
C. The installation head requirement
exceeds the pump potential
Clear the blockage;
Remove obstacles or replace the
impellers
Water doesn’t flow
when a tap is closed
and reopened
A. Inspect the check valve for
blockage
Reinstall the check valve to ensure
that there is no blockage;
The flow has
decreased over time
A. Partial blockage of the water inlet
filter;
B. The impeller is partially blocked
or the outlet pipe is partially
blocked;
Remove obstacles
The pump runs for a
period of time then
switches off
unexpectedly.
A. The thermal overload protection
device may have operated to stop
the water pump automatically.
The fluid density or fluid
temperature may be too high
causing the motor to overheat:
A small water demand may be
causing the pump to start and stop
excessively
