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Table 7- 1
Possible faults
Fault
Motor does not start
Motor starts up slowly
Humming noise when starting
Humming noise during operation
High temperature rise during no-load operation
High temperature rise when under load
Overheating of individual winding sections
Uneven running
Grinding sound, running noise
Radial vibrations
Axial vibrations
Table 7- 2
Key to causes of faults and remedial measures
No.
Cause of fault
A
Overloading
B
Interrupted phase in the supply cable
C
Interrupted phase in the supply cable after
switching on
D
Motor commutation is faulty
E
Winding short circuit or phase short circuit in stator
winding
H
Insufficient shielding for motor and/or encoder cable
J
Drive controller gain too high
K
Rotating parts grind
Foreign bodies in the motor
Bearing damage
L
Poor alignment
M
Shocks from coupled machine
If the fault still cannot be resolved after applying the measures specified above, please
contact the manufacturer or your local Siemens office.
Naturally cooled 1FW6 built-in torque motors
Operating Instructions, 07/2017, 6SN1197-0AF02-0BP2
Cause of the fault (see following table)
A
B
D
A
C
D
E
C
D
E
A
C
D
E
D
A
C
E
How to remedy the problem
Reduce load
Check frequency converter and supply cables
Check frequency converter and supply cables
Check the commutation, if required re-adjust the
commutation angle offset
Measure the winding resistances and insulation
resistances, motor replacement after consultation with
the manufacturer
Check the shielding and grounding
Adjust the controller
Determine cause and adjust parts
Consult the manufacturer
Contact the manufacturer; where required, repair by the
manufacturer
Align motor unit, check coupling
Check coupled machine
Operation
7.2 Dealing with faults
H
J
K
L
L
M
89
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