2.1 Frost protection
If the pump has to be stored after use, it must be stored in a
frost-free location.
VII. OPERATION AND MAINTENANCE
Make sure the pump is disconnected from
electric power supply before performing
maintenance operation.
The power cable must be replaced by
qualified personnel only.
The pump must not be operated with the
delivery valve shut off (closed head) for more
than a few seconds otherwise the motor will
overheat, possibly causing permanent
damage, not covered by warranty.
While MINI-SUB pumps do not require regular maintenance, it
is a good practice to monitor the conditions and performance
of the pump. This diagnosis may be carried out by checking the
maximum pressure (shut valve for a very short period) gener-
ated by the pump, and by checking the amperage draw of the
motor at standard duty flow rate.
Both these figures should be compared to pressures and current
draws recorded when the unit was initially installed.
If pumped water is not perfectly clean, it may be occasionally
necessary to clean the filter whit a steel brush to scrape the dirt
accumulated on the external surface
It is also possible to clean the internal section of the filter:
Loosen the screw that fixes the filter to the body of the electric
pump and remove it, scrap the dirt with a steel brush and rinse
it with clean water. If it is not sufficient, have the hydraulic parts
cleaned by an authorized centre.
If you are planning not to use the pump for a long time, it is ad-
visable to empty it completely, rinse with clean water and store
it in a dry location, where it can be protected from frost.
VIII. PUMP SERVICE CHART
The following chart offers a means of diagnosing general pump problems.
If the problem persists despite the recommended corrective actions, contact the Customer Service Department.
PROBLEM
POSSIBLE CAUSE
REMEDY
The electro-pump does not pump water,
the motor does not run.
No power.
Motor protection tripped.
Defective capacitor.
Verify that voltage is present and that
the plug has been correctly inserted.
Determine the cause of the problem and
restart the switch. If the thermal switch
has been enabled, wait for the system
to cool down.
Contact the Customer Assistance
Service.
The motor runs but the electro-pump
does not pump liquid.
Pump rotates in a wrong direction.
Air inlet from the suction.
Suction grid blocked
Reset the direction of rotation.
Verify that the fluid level has not lowered
below the suction grid.
Clean the filter
The electro-pump stops after running
for a short period of time because one of
the thermal motor circuit breaker trips.
The power supply does not conform to
the data on the name plate.
A solid object is blocking the impellers.
The liquid is too thick.
The liquid or environment is too hot.
Check the voltage on the power supply
cable leads.
Disassemble and clean the electro
pump.
Dilute the pumped fluid.
Remove the cause of the problem, wait
for the pump to cool down and restart it.
