Troubleshooting Guide - Leroy-Somer LSRPM Series Installation And Maintenance Manual

LEROY-SOMER

5 - TROUBLESHOOTING GUIDE

Incident
Abnormal noise
Noisy motor
Motor heats abnormally
Motor does not start
20
Installation and maintenance
LSRPM - PLSRPM
Synchronous permanent magnet motors
Possible cause
Originating in motor or machine being driven?
The cause is mechanical if the noise persists after
switching off the power supply, with the drive set to
«freewheel» mode
- vibration
- damaged bearings
- mechanical friction: ventilation, coupling
The cause is electrical if the noise stops after
switching off the power supply
- normal voltage and 3 phases balanced
- abnormal voltage
- phase imbalance
Other possible causes:
- incorrect settings
- drive malfunction
- faulty ventilation
- faulty supply voltage
- terminal connection fault
- overload
- partial short-circuit
- phase imbalance
Other possible causes:
- incorrect settings
- drive malfunction
at no load
- mechanical locking
- broken power supply line
- position feedback (drive message)
- thermal protection
on load
- phase imbalance
- drive
- position feedback (drive message)
- thermal protection
4155 en - 2012.05 / e
Remedy
Uncouple the motor from the equipment being driven
and test the motor on its own
- check that the key conforms to the type of
balancing (see section 2.3)
- change the bearings
- check
- check the power supply at the motor terminals
- check the drive settings
- check the connection of the terminal block and
the tightening of the terminals
- check the power supply line
- check the winding resistance
- refer to the drive manual
- check the environment
- clean the fan cover and the cooling fins
- check that the fan is correctly mounted on the shaft
- check
- check
- check the current consumption in relation to that
indicated on the motor nameplate
- check the electrical continuity of the windings and/or
the installation
- check the winding resistance
- refer to the drive manual
When switched off:
- check that rotation of the shaft is locked
(Note: the rotor magnets generate resistance to
rotation)
- check the fuses, electrical protection, starting
device
- check the drive wiring and settings, operation of the
position sensor
- check
When switched off:
- check the direction of rotation (phase order)
- check the resistance and continuity of the windings
- check the electrical protection
- check the settings and sizing (max. current that can be
delivered by the drive)
- check the drive wiring and settings, operation of the
position sensor
- check