TAM 00621 15
DSD 45-100 05/2007
Three-phase synchronous motor English
4.4 Malfunctions in operation
Safety instructions:
Troubleshooting, including rectification of any faults, may only be undertaken by
qualified personnel.
Do not disconnect any of the safety devices – even during test runs
Only disconnect and connect cables when electrically isolated and secured.
Observe the 5 safety rules for "Isolation" (see Section 3.3).
Beware of hot surfaces!
In the event of malfunctions in operation always
• Refer to the operating instructions for the machine/system.
• Refer to the operating instructions for the converter.
• If necessary, contact the manufacturer of the motor or converter.
Keep the following parameters to hand so that you can refer to them:
Nameplate data
Type and scope of the malfunction; Circumstances surrounding the malfunction
Application data (torque cycle, speed and forces over time; ambient conditions)
You may find the following selection of possible causes helpful during the fault rectification
process:
Malfunction
Cause Remedy
Motor does not start No controller enable
Controller error, encoder error
Brake does not release
Brake faulty
No power supply
Rotating field
Activate controller enable
Read out error list on
converter or controller, rectify
error
Check control, connection
and power supply
Have repaired by
manufacturer
Check connections and power
supply
Check phase sequence. If
necessary, replace the
connecting cables
Uneven running Insufficient screening on
connecting cables
Controller parameters too
high
Check screening connection
and grounding
Optimize controller
parameters
Vibrations Coupling elements or driven
machine poorly balanced
Drive train not aligned
properly
Fastening screws loose
Rebalance
Realign machine set
Check and tighten screwed
connections
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