12 Troubleshooting
12.1 Troubleshooting procedure
As a matter of principle, the instructions in the project planning and commis‐
sioning manuals must be followed in case of failures and errors. Contact the
manufacturer, if necessary.
Malfunctions Error cause Measures
Motor does not run Controller enable signal missing Activate controller enable signal
Controller fault Troubleshoot acc. to documentation of
controller
Voltage supply missing Control voltage supply
Brake is not released Check the brake activation
Vibrations Coupling elements or attachments are
poorly balanced
Re-balance
Adjustment of shaft end attachments
(coupling, gearbox, ...) is insufficient
Re-align the attachments
Mounting screws loose Lock screw connections acc. to specifi‐
cations
Running noise Foreign bodies within the motor Stop the motor --> repair by manufac‐
turer
Bearing is damaged Stop the motor --> repair by manufac‐
turer
High motor temperatures
Motor temperature monitoring is activa‐
ted
Operation outside of rated data Reduce load and check the dimension‐
ing
Heat dissipation is impaired Clean the motor
For fan units, clean fan grille and check
the fan function
For liquid cooling, check cooling circuit.
Wrong or defective temperature display Temperature sensor not connected Connect temperature sensor
Temperature sensor defective Stop the motor --> repair by manufac‐
turer
Connect the backup temperature sen‐
sor, if any is available.
Tab. 12-1: Measure at malfunction on MSK motors
48/57
Troubleshooting
MSK Synchronous Servomotors
Bosch Rexroth AG R911325169_Edition 03
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