4.4 Malfunctions in operation
Safety instructions:
Troubleshooting and rectification must only be performed by qualified personnel.
Do not disconnect any of the safety devices – even during test runs.
Disconnect cooling lines when un-pressurized
Only disconnect and connect electrical cables when electrically isolated and secured
Observe the 5 safety rules for "Isolation" (see Section 3.3).
Beware of hot surfaces!
In case 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.
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
TAM 00612 17
DA 100 – 280 W 06 / 2011
Three-phase synchronous motor water-cooled English
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