caprari K+ Serie Instrucciones De Servicio página 30

K.M080.. / K.M100H.. / K.M150L.. / K.W080.. / K.W100L.. / K.T040H.. / K.D200N..+0075..
28. TROUBLESHOOTING
Fault
1. The electric pump fails
to start
GB
2. The electric pump
starts, but the overload
relay activatyes
3. The electricpump fails
to give right head
30
Probable
1.1. Motor not powered.
1.2. Selector switch in the OFF position.
1.3. Thermic relay activated.
1.4. The fuses have burnt out owing to an excessive
overload.
1.5. Phase missing.
1.6. The thermic probe circuit of the motor is open or
the connections have not been made correctly.
2.1. Full voltage is not reaching all phases of the
motor.
2.2. The thermic relay value setting is too low.
2.3. Low/missing motor insulation.
2.4. Unbalanced power draw on the phases.
2.5. The impeller may be clogged, jammed or
damaged.
2.6. Pumped fluid excessively viscious and/or dense.
3.1. The intake or delivery sluice valve is partially
closed or clogged.
3.2. The check valve is partially clogged.
3.3. The intake/delivery pipe is clogged.
3.4. The electricpump turns in the wrong direction.
3.5. The electricpump head has diminished.
3.6. There are leaks from the system in the pumping
station.
3.7. The shredder has clogged.
3.8. The hydraulics are worn.
Remedies
1.1. Check whether the fuses have burnt out or
whether a circuit protecting relay has
activated.
1.2. Select the ON position.
1.3. Identify and eliminate the causes. Check the
setting. Reset the thermic relay.
1.4. Identify the cause and replace the fuses.
1.5. Eliminate the cause. Check the line
connections.
1.6. Check that the thermal probe circuit is not
broken, or make the correct connections.
2.1. Check the condition of the fuses in the
electrical equipment.
2.2. Check the setting and correct it if necessary.
2.3. Switch off the motor power supply and check
the motor insulation.
2.4. Check the power draw on the phases. The
maximum unbalance must not exceed 5%.
Having ascertained an unbalance, contact a
specialized workshop.
2.5. If the previous inspections have failed to
identify the fault, remove the electric pump
from the tank and check whether the impeller
has jammed.
2.6. Check whether the pump/motor combination
is correct.
3.1. Open or release the sluice valves.
3.2. Release the valve. If there is an external lever,
move this backwards and forwards several
times.
3.3. Electricpump clear water to flush, or
electricpump water at high pressure through
the pipes using a hose.
3.4. Electric pumps operating at low rotation speeds
may turn in the opposite direction with only
a little noise or vibration (particularly KCW
models). Check that the motor is turning in the
right direction.
3.5. Check the total head with a pressure gauge
when the electricpump is operating. Compare
the value with that given in the instruction
manual or, even better, with a previous reading.
If the electricpump has been in service for
some time and the head has dropped, remove
the electricpump and check for wear or if the
impeller is clogged.
3.6. Check and repair any damage.
3.7. Lift the electricpump and remove the solid
matter from the intake.
3.8. Adjust the wear by regulating the electricpump
casing shield (KT only) or replace the worn
parts.
Caprari S.p.A.