8 MAINTENANCE
Before any operations it's necessary to disconnect the power
supply.
If required ask to an electrician or to an expert technician.
Every maintenance operations, cleaning or reparation
executed with the electrical system under voltage, it
could cause serious injuries to people.
In case of extraordinary maintenance, or maintenance opera-
tions that require part-removing, the operator must be a quali-
fied technician able to read schemes and drawings.
It is suggest to register all maintenance operation executed.
During maintenance keep particular attention in order
to avoid the introduction of small external parts, that
could compromise the device safety.
It is forbidden to execute any operations with the
direct use of hands. Use water-resistant, anti-cut
gloves to disassemble and clean the filter or in other
particular cases.
During maintenance operations external personnel is
not allowed.
Maintenance operations that are not described in this manual
must be made only by special personnel authorized by
Calpeda S.p.A.
For further technical information regarding the use or the
maintenance of the device, contact Calpeda S.p.A.
9. DISPOSAL
The final disposal of the device must be done by specialized
company.
Make sure the specialized company follows the classification
of the material parts for the separation.
Observe the local regulations and dispose the device accor-
dingly with the international rules for environment protection.
10 SPARE PARTS
10.1 Spare-parts request
When ordering spare parts, please quote their designation,
position number in the cross section drawing and rated data
from the pump name plate (type, date and serial number).
The spare parts request shall be sent to CALPEDA S.p.A. by
phone, fax, e-mail.
Changes reserved.
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11. Troubleshooting
WARNING:
Turn off the power supply before performing any operations.
Do not allow the pump or motor to run when dry even for a short period
Strictly follow the user instructions and if necessary contact an authorised service centre
OFF
PROBLEMS
1) The motor does
not start
2) Fuses burn at
starting
3) The overload rely
cuts in after a few
seconds of ope-
ration.
4) The overload rely
cuts in after a few
minutes of opera-
tion.
5) The differential
relay cuts in
PROBABLE CAUSE
a) The selector switch is at OFF
b) The motor is not being powered
c) The automatic control devices (the level
switch, etc.) do not give consent
a) Unsuitable fuses
b) Locked rotor
c) Power cable or connection no longer intact
(in short-circuit)
a) The nominal voltage does not reach all the
motor phases.
b) The current consumption is unbalanced with
at least one phase having current greater
than the nominal one.
c) The current consumption is anomalous
d) Incorrect relay calibration
e) Locked rotor.
f) The power supply voltage does not
correspond to that of the motor.
a) Incorrect relay setting
b) The power supply network voltage is too low
c) The current consumption is unbalanced at
the phases with one phase higher than the
nominal power.
d) The pump does not rotate freely because of
some friction points.
e) The pump does not rotate freely because of
the high concentration of sand.
f) The unit is covered with sand.
g) High power panel temperature
a) Insufficient electrical insulation.
POSSIBLE SOLUTIONS
a) Select ON
b) Check if some fuses are burnt or if the protective relay has cut
in. Check terminal tightness. Check if power is being supplied
c) Wait for the operation conditions to return or verify automatism
efficiency
a) Replace with fuses that are suitable for motor absorption.
b) Send the motor to the authorized service centre.
c) Replace the cable and repeat the connection.
a) Check the integrity of the electrical equipment.
Check the tightness of the terminal block.
Check the power supply voltage.
b) Check the imbalance at the phases as described in paragraph
5.5 ‘Connection and electrical information’. If necessary send
the motor to the authorized service centre
c) Verify the accuracy of the star or delta connections.
d) Check if the amperage setting is correct.
e) Send to the authorized service centre
f) Replace the motor, or change the power supply.
a) See 3.d.
b) Contact the supplier.
c) See 3.b.
d) Send the unit to the authorized service centre.
e) Reduce the flow with the shutter.
f) Lower the well or raise the unit in a suitable manner.
g) Make sure the relay is at room temperature. Protect the power
panel from sun and heat.
a) Check the insulation resistance with a megohmmeter according
to the limits given in the section “Electrical connections”. If
necessary send the motor to the authorized service centre
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