14.5
Information in case of malfunctions
Fatal electric shock from live parts with more
than 50 V!
WARNING
Before starting work on live parts: Disconnect the machine from the power
supply and secure the mains switch against unintentional or unauthorized re‐
connection.
Check whether the voltage has fallen below 50 V before touching live parts!
Combustions via hot surface with tempera‐
tures over 100 °C
WARNING
Let the motor cool down, before maintenance. The thermal time constant sta‐
ted in the technical data is a measure for the cooling time. A cooling time up
to 140 minutes can be necessary!
Do not work on hot surfaces.
Use safety gloves.
In the event of faults, always observe the information in the project planning
and commissioning instructions. If necessary, contact the manufacturer
ter 17 "Service and support" on page 171
.
Malfunction
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 manufactur‐
er
Bearing is damaged
Stop the motor --> repair by manufactur‐
er
High motor temperatures
Motor temperature monitoring is activa‐
ted
Operation outside the parameters
Reduce load
Heat dissipation obstructed
Clean the motor
For fan units, clean fan grille and check
the fan function
For liquid cooling, check cooling circuit.
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
Bosch Rexroth AG
161/175
Synchronous Servomotors MSK For Potentially Explosive Areas
Commissioning, operation and maintenance
