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Faults, causes and remedies
Faults
Motor does not ramp up Counter torque too high
Motor overheated
Significant drop in
speed
Protective equipment
trips
Converter faults (only
for the converter world
motor)
90
Causes
Line voltage too low
Phase interruption
Circuitry incorrect
Circuitry incorrect
Overload
Switching frequency too high
Insufficient ventilation
Cooling air ducts contaminated
Coolant temperature outside the
permissible range.
Counter torque too high
Line voltage too low
Phase interruption
Circuitry incorrect
Overload
Phase interruption
Circuitry incorrect
Overload
Switching frequency too high
Winding and terminal short-circuit
Startup time is exceeded
Converter faults.
Remedy
Check the motor torque and the load
torque.
Check the line supply.
Check the connection to the line supply.
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
Adjust the cooling air to the right tem‐
perature
Check the motor torque and the load
torque.
Check the line supply.
Check the connection to the line supply.
Observe the circuit diagram and rating
plate
Compare data on the rating plate
Check the connection to the line supply.
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
Refer to the converter documentation.
Motors for mounting onto SIMOGEAR gearboxes
Operating Instructions, 01/2024, A5E53220841A/RS-AA
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