Siemens SIMOTICS SD - Electrical Faults

8.7.2 Electrical faults
Note
If you are operating the motor with a converter, the operating instructions of the converter must
also be observed if electrical faults occur.
Table 8-1 Electrical faults
↓ Motor fails to start
 ↓ Motor accelerates sluggishly
 ↓ Rumbling noise during startup
 ↓ Rumbling noise during operation
 ↓ High temperature rise during no-load operation
 ↓ High temperature rise with load
 ↓ High temperature rise of individual winding sections
 Possible causes of faults Remedial measures
X X  X  X  Overload Reduce the load.
X       Interrupted phase in the supply cable Check the switches and cables.
 X X X  X  Interrupted phase in the feeder cable af‐
ter switching on
Check the switches and cables.
 X      Mains voltage too low, frequency too
high
Check the power supply conditions.
    X   Mains voltage too high, frequency too
low
Check the power supply conditions.
X X X X   X Stator winding incorrectly connected Check the winding connection in the terminal
box.
 X X X   X Winding short circuit or phase short cir‐
cuit in stator winding
Determine the winding resistances and insulation
resistances. Carry out repair work after consulta‐
tion with the manufacturer.
     X  Incorrect direction of rotation Check the connection.
Operation
8.7faults
1LE5, 1PC4 shaft heights 280 ... 355
94 Operating Instructions, 11/2022, A5E41454666A