Leroy-Somer CPLS 112, Руководство по установке и обслуживанию

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INSTALLATION AND MAINTENANCE
CPLS drip-proof 3-phase induction motors
4240 en - 2014.09 / b
LEROY-SOMER
5 - TROUBLESHOOTING GUIDE
Incident Possible cause Remedy
Abnormal noise Originating in motor or machine being driven? Uncouple the motor from the equipment being driven
and test the motor on its own
Noisy motor Mechanical cause : if the noise persists after switching
off the power supply
- Vibration Check that the key conforms to the type of balancing
- Damaged bearings Change the bearings
- Mechanical friction Check the coupling and ventilation
Electrical cause : if the noise stops after switching off
the power supply
Check the power supply at the motor terminals
- Normal voltage and 3 phases balanced Check the terminal plate connection and that the
connectors are tight
- Abnormal voltage See drive documentation
- Phase imbalance Check the winding resistance
Motor heats up
abnormally
- Faulty ventilation Check the environment
Clean the ventilation grilles (or filters)
Check the forced ventilation motor electrical
connection
If necessary, check the temperature sensors are
working correctly (optional)
- Faulty supply voltage Check
- Overload Check the current consumption against that indicated
on the motor nameplate
- Partial short-circuit Check the electrical continuity of the windings and/or
the installation
- Phase imbalance Check the winding resistance
Motor does not start At no load:
- Mechanical locking
- Broken power supply line
When switched off:
Check by hand that the shaft rotates freely
Check the fuses, starting device, electrical and thermal
protection (optional).
On load:
- Phase imbalance
When switched off:
Check the direction of rotation (phase order)
Check the resistance and continuity of the windings
Check the electrical protection