DAB KDN 32-125.1 Anleitungen Für Installation Und Wartung Seite 38

FAULT
10. The pump turns in the
opposite direction
when switching off.
11. The pump vibrates
and operates noisily.
12. The stuffing box area
gets too hot after a
brief period of
operation.
13. There is too much
dripping from the
stuffing box.
14. The support
temperature in the
bearings area is too
high.
CHECK (possible cause)
A. Leakage in the intake pipe.
B. Foot valve or check valve faulty or
blocked in partly open position.
A. Check that the pump and/or the pipes are
firmly anchored.
B. There is cavitation in the pump (see point
8, paragraph on INSTALLATION).
C. Presence of air in the pump or in the
intake manifold.
D. Pump-motor alignment
performed.
A. The follower has been gripped too tightly
by the regulating screws.
B. The follower is in an oblique position
with respect to the pump shaft.
A. The follower has
tightened or the stuffing box is not
suitable or is fitted incorrectly.
B. The shaft or the protection bush is
damaged or worn.
C. The packing rings are worn..
A. Check motor and pump alignment.
B. Increased axial thrust due to wear of the
impeller pressure rings.
ENGLISH
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.
incorrectly 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.
been incorrectly 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.
33
REMEDY