Modifications And Spare Parts; Troubleshooting - DAB KV 3 Serie Instrucciones Para La Instalación Y El Mantenimiento

discharge hole. Switch on the pump and let it run for about an hour so as to bring the bearing(s) to running heat and thus enable the excess
grease to flow out. Screw the cap M1x1 back in place.

13. MODIFICATIONS AND SPARE PARTS

Any modification not authorized beforehand relieves the manufacturer of all responsibility. All the spare parts used in repairs
must be original ones and the accessories must be approved by the manufacturer so as to be able to guarantee maximum safety of the
machines and systems in which they may be fitted.

14. TROUBLESHOOTING

FAULT
1. The motor does not start
and makes no noise.
2. The motor does not start
but makes noise.
3. The motor turns with
difficulty.
4. The (external) motor
protection
immediately
starting.
5. The motor protection
trips too frequently.
6. The pump does not
deliver.
7. The pump does not
prime.
8. The pump supplies
insufficient flow.
CHECK (possible cause)
A. Check the protection fuses.
B. Check the electric connections.
C. Check that the motor is live.
D. The motor protector may have tripped due to
exceeding the maximum temperature limit
(single-phase version).
A. Ensure that the mains voltage corresponds to
the voltage on the data plate.
B. Check that the connections have been made
correctly.
C. Check that all the phases are present on the
terminal board.
D. The shaft is blocked. Look for possible
obstructions in the pump or motor.
A. Check the supply voltage which may be
insufficient.
B. Check whether any moving parts are scraping
against fixed parts.
C. Check the state of the bearings.
A. Check that all the phases are present on the
trips terminal board.
after B. Look for possible open or dirty contacts in the
protection.
C. Look for possible faulty insulation of the motor,
checking the phase resistance and insulation
to earth.
A. Ensure that the environment temperature is not
too high.
B. Check the calibration of the protection.
C. Check the motor rotation speed.
D. Check the state of the bearings.
A. The pump has not been correctly primed
(presence of air in the intake pipe or inside the
pump).
B. On three-phase motors, check that the
direction of rotation is correct.
C. Difference in suction level too high.
D. The diameter of the intake pipe is insufficient or
the horizontal stretch is too long.
E. Foot valve or intake pipe blocked.
A. The intake pipe or the foot valve is taking in air.
B. The downward slope of the intake pipe favours
the formation of air pockets.
A. Blocked foot valve.
B. The impeller is worn or blocked.
C. The diameter of the intake pipe is insufficient.
D. Check that the direction of rotation is correct.
ENGLISH
A. If they are burnt-out, change them.
 If the fault is repeated immediately this means
that the motor is short circuiting.
D. Wait for automatic reset of the motor protector
once the temperature has fallen below the
maximum limit.
B. Correct any errors.
C. If not, restore the missing phase.
D. Remove any obstructions.
B. Eliminate the cause of the scraping.
C. Change any worn bearings.
A. If not, restore the missing phase.
B. Change or clean the component concerned.
C. Change the motor casing with the stator or
reset any cables discharging to earth.
A. Provide suitable ventilation in the environment
where the pump is installed.
B. Calibrate at a current value suitable for the
motor absorption at full load.
C. Consult the motor data plate.
D. Change any worn bearings.
A. Fill the pump and the intake pipe with water.
Prime the pump.
B. Invert the connection of two supply wires.
C. See point 7 of the instructions for installation.
D. Replace the intake pipe with one with a larger
diameter.
E. Clean the foot valve and the intake pipe.
A. Eliminate the phenomenon, checking the
intake pipe accurately, and prime again.
B. Correct the inclination of the intake pipe.
A. Clean the foot valve.
B. Change the impeller or remove the obstruction.
C. Replace the pipe with one with a larger
diameter.
D. Invert the connection of two supply wires.
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REMEDY