PYD Electrobombas VERTINOX Serie Manual De Instalación Y Mantenimiento página 30

OPERATING AND MAINTENANCE MANUAL
SERIE VERTINOX
Fault
- Supply failure.
- Fuses are blown.
Motor does not run - Motor starter overload has tripped out.
when started -
- Main contacts in motor starter are not ma-
king contact or the coil is faulty
- Control circuit is defective.
- Motor is defective
- One fuse/automatic circuit breaker is
Motor starter blown.
overload trips out - Contacts in motor starter overload are
immediately when faulty.
supply is switched on - Cable connection is loose or faulty.
- Motor winding is defective.
- Pump Mechanically blocked.
- Overload setting is too low.
Motor starter - Overload setting is too low.
overload trips out - Low voltage at peak times.
occasionally.
Motor starter has not - Supply failure.
tripped out but the - Fuses are blown.
pump does not run. -
- Main contacts in motor starter are not
making
contact or the coil is faulty
- Control circuit is defective.
Pump capacity not - Pump inlet pressure is too low (cavita-
constant tion).
- Suction pipe/pump partly blocked by
impurities.
- Pump draws in air.
Pump runs but gives - Suction pipe/pump blocked by impurities.
no water - Foot or non-return valve blocked in closed
position.
- Leakage in suction pipe.
- Air in suction pipe or pump.
- Motor rotates in the wrong direction.
Pump runs back- - Leakage in suction pipe.
wards when switched - Foot or non-return valve is defective.
o .
Leakage in sha seal. - Sha seal is defective.
Noise - Cavitation occurs in the pump.
- Pump does not rotate freely(frictional
resistance) because of the incorrect pump
sha position
- System head and pump head ratio too low.
- Frequency converter not run
www.proindecsa.com / proindecsa@proindecsa.com
Cause
ermal protection has tripped out.
ermal protection has tripped out.
30
Remedy
- Connect the electricity supply.
- Replace fuses.
- Reactivate the motor protection.
- Reactivate the thermal protection.
- Replace contacts or magnetic coil.
- Repair the control circuit.
- Replace the motor
- Cut in the fuse.
- Replace motor starter contacts.
- Fasten or replace the cable connec-
tion.
- Replace the motor.
- Remove the mechanical blocking of
the pump.
- Set the motor starter correctly.
- Set the motor starter correctly.
- Check the electricity supply.
- Connect the electricity supply.
- Replace fuses.
- Reactivate the thermal protection.
- Replace contacts or magnetic coil.
- Repair the control circuit.
- Check the Suction conditions.
- Clean the pump or the pump pipe.
- Check the suction conditions.
- Clean the pump or suction pipe.
- Repair the foot or non-return valve.
- Repair the suction pipe.
- Check the suction conditions.
- Change the direction of rotation of
the motor.
- Repair the suction pipe.
- Repair the foot or non-return valve.
- Replace the sha seal.
- Check the suction conditions.
- Adjust the pump sha .
- Improve system or choose a right
pump.
- Check the frequency converter
operation.