Danfoss VLT AutomationDrive FC 360 Programming Manual page 317

Programming Guide | VLT® AutomationDrive FC 360
WARNING/ALARM 8, DC Under Voltage
Cause
If the DC-link voltage (DC-link) drops below the under-voltage limit, the drive trips after a fixed time delay. The time delay varies with unit
size.
Troubleshooting
Check that the supply voltage matches the drive voltage.
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Perform the input voltage test.
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Perform the soft charge circuit test.
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WARNING/ALARM 9, Inverter Overload
Cause
The drive is about to cut out because of an overload (too high current for too long). The counter for electronic, thermal inverter
protection issues a warning at 90% and trips at 100%, while giving an alarm. The drive cannot be reset until the counter is below 90%.
The fault occurs when the drive has run with more than 100% overload for too long.
Troubleshooting
Compare the output current shown on the LCP with the drive rated current.
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Compare the output current shown on the LCP with the measured motor current.
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Show the thermal drive load on the LCP and monitor the value. When running above the drive continuous current rating, the
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counter increases. When running below the drive continuous current rating, the counter decreases.
WARNING/ALARM 10, Motor ETR Overtemperature
Cause
According to the electronic thermal protection (ETR), the motor is too hot. Select whether the drive issues a warning or an alarm when
the counter reaches 100% in parameter 1-90 Motor Thermal Protection. The fault occurs when the motor runs with more than 100%
overload for too long.
Troubleshooting
Check for motor overheating.
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Check if the motor is mechanically overloaded.
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Check that the motor current set in parameter 1-24 Motor Current is correct.
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Ensure that the motor data in parameter 1-20 to parameter 1-25 is set correctly.
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Running AMA in parameter 1-29 Automatic Motor Adaptation (AMA) tunes the drive to the motor more accurately and reduces
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thermal loading.
WARNING/ALARM 11, Motor Thermistor Overtemperature
Cause
Check whether the thermistor is disconnected. Select whether the drive issues a warning or an alarm in parameter 1-90 Motor Thermal
Protection.
Troubleshooting
Check for motor overheating.
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Check if the motor is mechanically overloaded.
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