Saci pumps CF-2 MAGNUS Manuel D'installation Et D'entretien page 14

POSSIBLE
BREAKDOWN
1.The motor does not start and does not
make a noise
2. The motor does not start, but does make
a noise.
3. The motor turns with difficulty
4. The protection (exterior) of the motor
comes on immediately after starting.
5. The motor protection comes on too
frequently.
6. The pump gives no flow
7. The pump does not floor
8. The pump generates insufficient flow.
9. The pump turns backwards when turned
off
10. The pump vibrates and works noisily.
CAUSES
A. Check the protection fuses
B. Check the electrical connections
C. Make sure the motor is receiving power
A. Make sure the supply voltage is that indicate
on the place.
B. Make sure the connections are made
correctly.
C. Check for all phases in the junction box.
D. The shaft is blocked, Look for possible
obstructions in the pump or motor.
A. Check the supply voltage, which might be
insufficient.
B. Check possible rubbing between the moving
and fixed parts.
C. Check the state of the bearings
A. Make sure all phases are present in the
junction box.
B. Check for possible open contacts or dirty
contacts in the protection.
C. Check for possibly faulty motor insulation by
checking the resistance between phases and
insulation to ground.
D. The pump is working above the working point
for which it was gauged.
E. The values of protection activation are wrong.
F. The viscosity or density of the liquid pumped
is different from that used in the project
phase.
A. Make sure that the surrounding temperature
is not too high
B. Check the calibration of the protection.
C. Check the state of the bearings
D. Check the turning speed of the motor
A. The pump has not been stoked correctly.
B. Make sure the triple phase motors are turning
in the right direction.
C. Excessive uptake difference.
D. Uptake pipe with insufficient diameter or
extension excessively raised.
E. Dirty hair cleaner filter.
A. The uptake pipe or the pre-filter are taking in
air.
B. The negative inclination of the uptake pipe
enhances the formation of air bubbles
A. Dirty hair cleaner filter
B. Worn or obstructed rotor.
C. Insufficient diameter in uptake pipes.
D. Make sure it is turning in the right direction.
A. Loss from uptake pipe
B. Base or retention valve faulty or blocked half
open.
A. Make sure that the pump or the pipes are
correctly fixed.
B. The pump cavitates
C. Air in the pump or in the uptake manifold
12
SOLUTIONS
A. Replace if burnt.
➡ If the problem can not be solved
immediately, it means that the motor is
short circuiting.
B.Correct all possible errors
C.If not, reset the phase that is missing.
D.Eliminate the obstruction.
B. Eliminate the cause of the rubbing.
C. Replace the worn bearings.
A. If not, reset the phase that is missing
B. Replace or reclean the component.
C. Replace the motor housing with stator or
reset the ground cables.
D. Establish the working point according to
the characteristic curves of the pump.
E. Check the values set in the motor
protection: modify them or replace the
component if necessary.
F. Reduce the flow with a flood valve on the
drive side or install a larger motor.
A. Suitably ventilate the place where the
pump is installed.
B. Calibrate with a current value adapted to
the absorption of the motor at full load.
C. Replace worn bearings.
A. Fill the pump and uptake pipe with water
and stoke.
B. Invert two supply cables.
C. Consult the point of the instructions on
"Installation".
D. Replace the uptake pipe with one of a
larger diameter.
E. Clean the hair cleaner pre-filter
A. Eliminate the phenomenon by carefully
checking the uptake pipe, repeat the
stoking operations.
B. Correct the inclination of the uptake pipe.
A. Clean the hair cleaner pre-filter.
B. Replace the rotor or eliminate the
obstruction.
C. Change the pipe for one with a larger
diameter.
D. Invert two supply cables
A. Eliminate the problem
B. Repair or replace the faulty valve.
A. Tighten all loose parts.
B. Reduce the uptake height and check for
losses in load. Open the uptake valve.
C. Purge the uptake and pump pipes.
ENGLISH