DAB PUMPS ALM 200 Instrucciones Para La Instalación Y El Mantenimiento página 20

11. MODIFICATIONS AND SPARE PARTS
12. TROUBLESHOOTING
FAULT
1. The motor does A. Check the protection fuses.
not start and B. Check the electric connections.
makes no noise. C. Check that the motor is live.
2. The motor does A. Ensure that the mains voltage corresponds to the
not start but
makes noise. B. Check that the connections have been made
C. Check that all the phases are present on the
D. The shaft is blocked. Look for possible
E. Capacitor short-circuiting or broken.
3. The motor turns A. Check the supply voltage which may be
with difficulty.
B. Check whether any moving parts are scraping
C. Check the state of the bearings.
4. The (external) A. Check that all the phases are present on the
motor protection
trips immediately B. Look for possible open or dirty contacts in the
after starting.
C. Look for possible faulty insulation of the motor,
5. The motor A. Ensure that the environment temperature is not
protection trips
too frequently. B. Check the calibration of the protection.
C. Check the motor rotation speed.
D. Check the state of the bearings.
6. The pump A. The impeller is worn or blocked.
supplies
insufficient flow. B. Check that the direction of rotation on three-
7. The pump A. Check that the pump and/or the pipes are firmly
vibrates and
operates noisily. B. There is cavitation in the pump.
C. The pump is running above its plate
D. Ensure that the mains voltage corresponds to the
8. The absorbed A. Check that the fluid density or viscosity is not too
current is too
high. B. Check whether any moving parts are scraping
C. The feeding voltage is not the same as the
D. The pump is running above its plate
Any modification not authorized beforehand relieves the manufacturer of all responsibility.
CHECK (possible cause)
voltage on the data plate.
correctly.
terminal board.
obstructions in the pump or motor.
insufficient.
against fixed parts.
terminal board (on three-phase models).
protection.
checking the phase resistance and insulation to
earth.
too high.
phase versions is correct.
anchored.
characteristics.
voltage on the data plate.
high.
against fixed parts.
voltage on the data plate.
characteristics.
ENGLISH
A. If they are burnt-out, change them.
⇒ If the fault is repeated immediately this means
that the motor is short circuiting.
B. Correct any errors.
C. If not, restore the missing phase.
D. Remove any obstructions.
E. Change the capacitor.
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. Change the impeller or remove the obstruction.
B. Invert the connection of two supply wires.
A. Fasten any loose parts.
B. Increase the system pressure, keeping within the
allowed limits.
C. Reduce the flow rate.
A. Analyse the fluid to be pumped.
B. Eliminate the cause of the scraping.
C. Feed the motor with the correct voltage.
D. Reduce the flow rate.
18
REMEDY