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Faults, causes and remedies
Faults
Motor running uneven-
ly
Motor does not ramp
up
Motor overheated
Significant drop in
speed
Protective equipment
trips
50
Causes
Coupling forces pull or push
Incorrect motor installation
Out of balance due to belt pulley or
coupling
Machine mounting too weak
Counter torque too high
Low line voltage
Phase interruption
Circuitry incorrect
Circuitry incorrect
Overload
Switching frequency too high
Insufficient ventilation
Cooling air ducts contaminated
Counter torque too high
Low line voltage
Phase interruption
Circuitry incorrect
Overload
Phase interruption
Circuitry incorrect
Overload
Switching frequency too high
Winding and terminal short-circuit
Startup time is exceeded
Remedy
Align the motor precisely, correct the
coupling
Check the motor type of construction
Balance precisely
Check the mounting
Check the motor torque and the load
torque
Check line conditions
Check the connection network
Observe the circuit diagram and rating
plate
Observe the circuit diagram and rating
plate
Compare data on the rating plate
Observe the rated duty
Check the cooling air ducts, check the
direction of rotation
Clean cooling air ducts
Check the motor torque and the load
torque
Check line conditions
Check the connection network
Observe the circuit diagram and rating
plate
Compare data on the rating plate
Check the connection network
Observe the circuit diagram and rating
plate
Compare data on the rating plate
Observe the rated duty
Measure the insulation resistance
Check the power-up conditions
Operating Instructions, 02/2015, 70000004023775
BA 2320
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