Some difficulties may occur while operating the electric machine. Possible causes and actions are
given in Table below. If the situation occurs, it should be corrected as soon as possible.
These
instructions do not cover all details or variations in the equipment nor provide information for
every possible condition to be met in connection with installation, operation or maintenance.
Contact Danfoss for more information.
Table 7. Troubleshooting chart
Symptom Possible cause Action
Excessive vibration, noise
Unbalance at connected
machine or the
powertrain components.
Check the balance and installation of the actuator and drivetrain components.
Attachment bolts are
loose.
Replace and tighten the bolts.
Imbalance at the electric
machine.
Contact Danfoss.
Particles inside the electric
machine.
Contact Danfoss.
Electric machine
overheating
Overload.
Reduce load. Check the electric machine model description and rating plate, check
the inverter limits.
Cooling system failure.
Check the cooling system integrity, ow and uid temperature.
Change the cooling ow direction to ush the cooling system from sediment
possibly accumulated. See also Chapter
Emergency operation.
Leakage in the cooling
system.
Check the cooling system circuit and connections.
Rigid particles inside the
electric machine
cooling
channel.
Try pulsating coolant to open the channels. Contact Danfoss.
Wrong electric machine
parameters in the inverter.
Check and correct the machine parameters from the inverter.
Winding short circuit. Replace the electric machine.
Electric machine does not
work properly or the
performance is poor
Wrong electric machine
parameters in the inverter.
Check and correct the
parameters from the inverter.
Demagnetization of
magnets due to
overheating.
Measure the winding resistance, refer to manufacturer data. Replace the electric
machine if necessary.
Insulation fault.
Measure the insulation resistance, refer to manufacturer limits. See
Chapter
Insulation resistance test. Replace the electric machine if necessary.
Temperature measurement
failure
The PT100 sensor is faulty.
Measure the resistance of the PT100 sensor, see Chapter
Low voltage
connections. If
the sensor is faulty, read out the signal from an other sensor. Contact Danfoss.
See
also Chapter Emergency operation.
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