DAB KVC Series, Инструкция по установке и обслуживанию

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ENGLISH
23

It is recommended to empty the pump when it is
not running for a long time at normal temperature.

The drain plug shall be opened until the pump will
be utilized again.

When restarting after long periods of inactivity it is
necessary to repeat the operations described
above in the paragraphs
WARNINGS and
STARTING UP .
10. MAINTENANCE

In normal operating conditions the electropump
does not require any kind of maintenance.

It is recommended to check time by time current
absorption, pressure head at closed valve and
maximum flow.

The electropump can only be dismantled by
specialised, skilled personnel in possession of
the qualifications required by the specific
regulations.

In any case all repair and maintenance jobs must be
carried out only after having disconnected the
pump from the power mains.
If the liquid has to be drained out
maintenance, ensure that the liquid
coming out cannot harm persons or
things, especially in using hot water.
The legal requirements on the disposal
of any harmful fluids must also be
complied with.
10.1 Modifications and spare parts
Any modification not authorised beforehand relieves the
manufacturer of all responsibility. All the spare parts
must be authentic and all the accessories must be
authorised by the manufacturer
11. TROUBLESHOOTING
Fault Check (possible cause) Remedy
The motor does not start and makes
no noise.

Check the protection fuses.
If they are burnt-out, change them.

Check the electric connections. Correct any errors.

Check that the motor is live.
 Motor protector cut-off the motor,
for the single-phased motors, due
to over heating of tag windings. Wait for automatic reset of the motor
protector once the temperature has
fallen below the maximum limit.
The motor does not start but makes
noise.

Check that supply voltage
correspond with voltage on the
pump label.

Check the electrical connections. Correct any errors.

Check that all the phases are
present. Restore the missing phase.
 Check for obstructions in the
pump or motor. Remove any obstructions.
The motor turns with difficulty. 
Verify that supply voltage is at an
acceptable valve.

Check whether any moving parts
are scraping against fixed parts.
Eliminate the cause of the scraping.

Check the state of the bearings. Change any worn bearings.
The (external) motor protection trips
immediately after starting.

Check that all the phases are
present.
Restore the missing phase.

Look for possible open or dirty
contacts in the protection. Change or clean the component
concerned.
 Look for possible faulty insulation
of the motor, checking the phase
resistance and insulation to earth. Change the motor casing with the
stator or reset any cables
discharging to earth.
The motor protection trips too
frequently.

Ensure that the environment
temperature is not too high.
Provide suitable ventilation in the
environment where the pump is
installed.

Check the calibration of the
protection. Calibrate at a current value suitable
for the motor absorption at full load.

Check the state of the bearings. Change any worn bearings.
 Check the motor rotation speed.