7.3 Correcting faults on the motor
WARNING
Operation without functioning protective devices
Operation without functioning protective devices can cause death or severe injury.
● Operate the motor, even in test operation, only with functioning protective devices.
If there are deviations from normal operation or if faults occur, proceed as follows.
● Identify the fault using the "Possible faults" table.
Also observe the converter messages.
● Try to correct the fault using the "Fault causes and remedial measures" key table.
Table 7-5 Possible faults
Fault Fault cause (see "Fault causes and remedial measures"
key table)
Motor does not start A B
Motor starts slowly A C F
Humming sound when starting C F
Humming sound in operation A C F
High temperature rise under no-load oper‐
ation
D I
High temperature rise under load A C I
High temperature rise of individual winding
sections
F
Uneven running J K
Grinding sound, running noise L
Radial vibrations M N O P R
Axial vibrations O Q R
Table 7-6 "Fault causes and remedial measures" key table
No. Fault cause Remedial measures
A Overload Reduce load
B Interruption of a phase in the supply cable /
motor winding
Check the frequency converter and supply cables, measure the winding
resistances and insulation resistances, repair after consultation with man‐
ufacturer
C Interrupted phase in the feeder cable after
switching on
Check the frequency converter, supply cables and the winding resistan‐
ces
D Converter output voltage too high, fre‐
quency too low
Check the settings on the frequency converter, perform automatic motor
identification
F Winding short-circuit or phase short-circuit
in stator winding
Measure the winding resistances and insulation resistances, repair after
consultation with the manufacturer, if required, replace the motor
Diagnostics
7.3 Correcting faults on the motor
SINAMICS S210 servo drive system
Operating Instructions, 12/2017, A5E41702836B AA 171
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