No. Fault cause Remedial measures
I Heat dissipation impeded by deposits Clean the surface of the drives and ensure that the cooling air can flow
in and out unimpeded
Cooling air inlet/outlet is blocked by for‐
eign bodies
Remove the reason for the blocking and ensure that the cooling air can
flow in and out unimpeded
J Insufficient shielding for motor and/or en‐
coder cable
Check the shielding and grounding
K Excessive drive controller gain Adjust the controller
L Rotating parts are grinding Determine cause and adjust parts
Foreign bodies inside the motor Replace the motor
Bearing damage Replace the motor
M Rotor not balanced Replace the motor
N Rotor out of true, shaft bent Consult the manufacturer
O Poor alignment Align motor set, check coupling
P Coupled machine not balanced Re-balance coupled machine
Q Shocks from coupled machine Check coupled machine
R Fault originating from the gearbox Adjust/repair gearbox
If the fault still cannot be resolved after taking the measures stated above, please contact the
manufacturer or the Siemens Service Center.
Diagnostics
7.3 Correcting faults on the motor
SINAMICS S210 servo drive system
172 Operating Instructions, 12/2017, A5E41702836B AA
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