Operation
8.2 Faults
Synchronous Motors 1FK7
42 Operating Instructions, 03/2011, 610.40700.40c
8.2 Faults
Note
Damage to the machine caused by faults
Correct the cause of the fault as specified in the remedial measures section. Repair any
damage to the machine/motor.
Note
When operating the motor with a converter, refer also to the operating instructions of the
frequency converter if electrical faults occur.
If there are deviations from normal operation or if faults occur, initially proceed according to
the following list. In this regard, observe the relevant chapters in the documentation
associated with the components of the complete drive system.
Even in test operation, never disable protective functions or devices.
Table 8- 1 Possible faults
Fault Cause of fault (see key table)
Motor does not start A B
Motor starts slowly A C F
Humming sound when starting C F
Humming sound in operation A C F
High temperature rise under no-load
operation
D GHI
High temperature rise under load A C G H I
High temperature rise of individual
winding sections
F
Uneven running J K
Grinding sound, running noise L
Radial vibrations M N O P R
Axial vibrations O Q R
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