Troubleshooting - caprari CVX Serie Betriebs- Und Wartungsanleitung

CVX
9

TROUBLESHOOTING

Faults
1. The electric pump fails to
start.
GB
2. The fuses burn-out on
start-up.
3. The overload relay
activates after a few
seconds service
4. The overload relay
activates after only a few
minutes service.
16
Probable causes
1.1. The selector switch is set to the OFF position.
1.2. The motor is not powered.
1.3. The automatic monitoring devices (level
gauge, etc.) are not enabling the equipment.
2.1. Fuses of inadequate size.
2.2. Insufficient electrical insulation.
2.3. Damaged power supply cable.
3.1. Full voltage is not reaching all the motor
phases.
3.2. The power draw is unbalanced between the
phases.
3.3. Abnormal power draw.
3.4. Wrong relay setting.
3.5. The rotor is jammed.
3.6. The power supply voltage fails to correspond
to that of the motor.
4.1. Wrong relay setting.
4.2. Mains voltage too low.
4.3. Power draw unbalanced between the phases.
4.4. Abnormal power draw.
4.5. The electric pump fails to turn freely since
parts of it are rubbing.
4.6. Electric panel temperature high.
4.7. The motor turns in the wrong direction.
1.1. Turn to the ON position.
1.2. Check the condition of the electrical equipment.
Check whether the equipment is receiving
power.
1.3. Wait until the correct operative conditions have
been restored or check the efficiency of the
monitoring devices.
2.1. Replace with fuses suited to the power draw of
the motor.
2.2. Use an ohmmeter to check the insulation
resistance.
Overhaul or replace the electric motor if
necessary.
2.3. Repair or, if necessary, replace the cable.
3.1. Check the condition of the electrical equipment.
Check that the terminal strip is well tightened.
Check the power supply voltage.
3.2. Check the unbalance according to the
instructions in paragraph 5.5 "Electrical
connections and information".
If necessary, overhaul or replace the electric
motor.
3.3. Check that the star or delta connections are
correct.
3.4. Check that the setting amperage is correct.
3.5. Disconnect the power supply and attempt to
release the rotor by hand.
Send the unit to an authorized after-sales
service center if necessary.
3.6. Replace the motor or check the power supply.
4.1. See 3.4.
4.2. Check for losses on the power main.
Contact the Electricity Board if necessary.
4.3. See 3.2.
4.4. See 3.3.
4.5. Send the unit to an authorized after-sales
service center.
4.6. Check that the relay has been set to
compensated ambient temperature.
Protect the electric control panel from the sun
and heat.
4.7. Invert two of the three phases.
Remedies
Caprari S.p.A.