Troubleshooting; Error Conditions - DAB SMC6 Instrucciones Para La Instalación Y El Mantenimiento

The materials used in pump construction are:
Steel and cast iron,
–
Aluminum,
–
The disposal of polluting liquids and materials should follow current environmental regulations.

12. TROUBLESHOOTING

FAULTS
1. The pumps gives no
water.
2. The pump is not starting
but fuses don't blow up
and starter relays do not
trip.
3. The starter trips or the
fuses blow-out when the
pump is running.
4. The pump runs with a low
capacity or head.
CHECKS (possible causes)
A. Water level in the well lower than pump suction nozzle.
B. Blocked valve.
C. Leaks in the delivery pipe.
D. Voltage lower than the rated value and absorption higher
than normal.
E. Absorbed current lower than normal due to air in the
pump.
F. Clogged grid because of suspended solids.
G. Unexpected fiction losses
A. No voltage in the line.
B. The circuits is cut off by the cable on in motor windin.
C. Open circuit in the starter.
A. Too low voltage.
B. Overload due to sand clogging; bearings tend to saize.
C. Single phase: a voltage 1.5/2 times higher than normal
runs through motor windings, so the starter trips stopping
the unit.
D. The starter is installed in a too warm place.
E. The starter in not correctly calibrated.
F. Electropump blocked in a crooked sinkhole with
consequent abnormal value of the absorbed current.
G. Cut-off conductors in the starter.
H. Grounded, short-circuited or cut-off cable joint or motor
windings.
A. Wrong motor rotation.
B. The delivery pipe leaks; flange or coupling not well
fastened.
C. Voltage lower than normal, absorbed current higher than
normal.
D. Clogged grid.
E. Worm impellers and diffusers.
F. The manometric head has been wrongly calculated.
ENGLISH
Rubber and plastic,
–
Copper.
–

Error conditions

23
REMEDIES
A. Increase the pump depth.
B. Kick the pipe line with a hammer trying to
unblock the valve.
C. Check delivery pipe by the flanges.
D. Increase voltage.
Change the supply cable with a larger one.
E. Start and stop the pump at intervals of about
a minute.
F. Clean the pump.
G. Check calculations and use larger pipes if
necessary.
A. Check voltage ratings on main and on starter
terminals.
B. Remove starter fuses and connect one
Ohmmeter conductor to delivery pipe; Check
then motor cables terminals one by one with
the other conductor. The reading of each
terminal shloud be at least 10 Megahoms.
C. Check circuit integry referring to electric
diagrams.
A. Increase supply cable diameter.
B. Pull on the pump and clean it.
C. Check voltage on all three phases. Check the
conditions of starter fuses and contact.
D. Set starter overload relays on the highest
value.
E. If the amperometer shows normal voltage and
the starter trips
calibrations, replace the overload relay.
F. Move the unit so to straighten it and it again.
G. See point 2.C
H. See point 2.B
A. Lift the pump out of the well and check the
delivery pipe.
B. Move the unit so to straighten it and start it
again.
C. Lift the pump out of the well and check the
delivery pipe.
D. Clean the pump.
E. Replace worm parts.
F. Calculate again the manometric head; replace
the unit with a more suited one.
also after different