TAM00721 16
DSD-028 / DSD-036 / DSD2-028 / DSD2-036 04/2013
Three-phase-synchronous motor English
Have the following information ready:
• Nameplate data
• type and scope of the malfunction, situation on occurrence of the malfunction
• application data (torque cycle, speed and forces over time; ambient conditions)
The following selection of possible causes can be helpful in the fault rectification process:
Malfunction Cause Remedy
Motor does not start No controller enable
Controller fault, encoder fault
Brake does not release
Faulty brake
No power supply
Rotating field
Activate controller enable
Read out fault list on the converter or
controller; rectify faults
Check control, connections, and
power supply
Repairs carried out by manufacturer
Check connections and power supply
Check phase sequence. If
necessary, switch over the
connecting cables
Uneven running Insufficient screening on
connecting cables
Controller parameters too high
Check screening connection and
grounding
Optimise controller parameters
Vibrations
Coupling element or driven
machine poorly balanced
Inadequate alignment of the drive
train
Fixing screws loose
Rebalance
Realign machine set
Check and tighten screwed
connections
Running noises
Foreign bodies in the motor
Bearing damage
Repairs carried out by motor
manufacturer
Repairs carried out by motor
manufacturer
Temperature rise in the
motor
Motor temperature
monitoring unit trips
Drive overload
Motor surface/airways dirty
as been installed in an area that
does not allow enough space
Brake not releasing fully – brake
dragging
Check motor load and compare with
nameplate
Clean motor surface/airways
Check motor has been installed in
acc. with Sections 2.6 and 3.2
Have repaired by motor manufacturer
Current consumption too
high, motor torque too low
Indexing angle incorrect Check indexing angle and adjust if
necessary
Table 3: Malfunctions
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