ENGLISH
29
FAULT
CHECK (possible cause)
REMEDY
6. The pump does not
deliver.
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. 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.
7. The pump does not
prime.
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. Eliminate the phenomenon, checking
the intake pipe accurately, and prime
again.
B. Correct the inclination of the intake
pipe.
8. The pump supplies
insufficient flow.
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.
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.
9. The pump flow rate
is not constant.
A. Intake pressure too low.
B. Intake pipe or pump partly blocked
by impurities.
B. Clean the intake pipe and the pump.
10. The pump turns in
the opposite
direction when
switching off.
A. Leakage in the intake pipe.
B. Foot valve or check valve faulty or
blocked in partly open position.
A. Eliminate the fault.
B. Repair or replace the faulty valve.
11. The pump vibrates
and operates
noisily.
A. Check that the pump and/or the pipes
are firmly anchored.
B. There is cavitation in the pump (see
point 7, paragraph on
INSTALLATION)
C. The pump is running above its plate
characteristics.
D. The pump is not turning freely.
A. Fasten any loose parts.
B. Reduce the intake height or check for
load losses.
C. Reduce the flow rate.
D. Check the state of wear of the
bearings.
Summary of Contents for KVC 3/3
Page 2: ......
Page 89: ...84 9 A B B 10 A B A B 11 A B n 7 C D A B C D...
Page 101: ...96...
Page 102: ...97...
Page 103: ...98...
Page 104: ...99...
Page 107: ...102 KV 6 7 M KV 10 4 M KV 10 5 M KV 3 7 T KV 3 10 T KV 6 7 T KV 10 4 T KV 10 5 T...
Page 108: ...103 KV 32 2 T KV 32 3 T KV 32 4 T KV 32 5 T KV 32 6 T KV 32 7 T KV 32 8 T...
Page 109: ...104 KV 40 2 T KV 40 3 T KV 40 4 T KV 40 5 T KV 40 6 T KV 40 7 T KV 40 8 T...
Page 110: ...105 KV 50 2 T KV 50 3 T KV 50 4 T KV 50 5 T KV 50 6 T KV 50 7 T KV 50 8 T KV 50 9 T...
Page 114: ...109 05 07 cod 0013 550 05...
