DAB KDN 32-125.1 Anleitungen Für Installation Und Wartung Seite 28

FAULT
6. The pump does not A. The pump has not been correctly primed.
deliver.
B. Check that the direction of rotation of the three-
C. Difference in suction level too high.
D. The diameter of the intake pipe is insufficient or
E. Foot valve blocked.
7. The pump does not A. The intake pipe or the foot valve is taking in air.
prime. B. The downward slope of the intake pipe favours
8. The pump supplies A. Blocked foot valve.
insufficient flow. 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..
9. Invert the connection of A. Intake pressure too low.
two supply wires. B. Intake pipe or pump partly blocked by
10. The pump turns in the A. Leakage in the intake pipe.
opposite direction when B. Foot valve or check valve faulty or blocked in
switching off.
11. The pump vibrates and A. Check that the pump and/or the pipes are firmly
operates noisily.
B. There is cavitation in the pump (see point 8,
C. Presence of air in the pump or in the intake
D. Pump-motor alignment incorrectly performed.
12. The stuffing box area A. The follower has been gripped too tightly by the
gets too hot after a brief
period of operation. B. The follower is in an oblique position with
13. There is too much A. The follower has been incorrectly tightened or
dripping from the stuffing
box.
B. The shaft or the protection bush is damaged or
C. The packing rings are worn..
14. The support temperature A. Check motor and pump alignment.
in the bearings area is B. Increased axial thrust due to wear of the
too high.
ENGLISH
CHECK (possible cause)
phase motors is correct.
the length is too long.
the formation of air pockets.
impurities.
partly open position.
anchored.
paragraph on INSTALLATION).
manifold.
regulating screws.
respect to the pump shaft.
the stuffing box is not suitable or is fitted
incorrectly.
worn.
impeller pressure rings.
A. Fill the pump and the intake pipe with water. Prime the
pump.
B. Invert the connection of two supply wires.
C. See point 8 of the instructions on "Installation".
D. Replace the intake pipe with one with a larger
diameter.
E. Clean the foot valve.
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.
B. Clean the intake pipe and the pump.
A. Eliminate the fault.
B. Repair or replace the faulty valve.
A. Fasten any loose parts.
B. Reduce the intake height or check for load losses.
Open the intake valve.
C. Bleed the intake pipes and the pump.
D. Repeat the procedure described in paragraph 7.2.
A. Stop the pump and slacken the follower, then proceed
as in paragraph 12.3.1.
B. Stop the pump and position the follower perpendicular
to the pump shaft.
A. Check the follower and the type of stuffing box used.
B. Check and/or change the shaft or the shaft protection
bush.
C. Proceed as in paragraph 12.3.1.
A. Proceed as in paragraph 7.2
B. Clean the balancing holes in the impeller, change the
pressure rings.
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REMEDY