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
l Check that the supply voltage matches the drive voltage.
l Perform the input voltage test.
l Perform the soft charge circuit test.
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
l Compare the output current shown on the LCP with the drive rated current.
l Compare the output current shown on the LCP with the measured motor current.
l Show the thermal drive load on the LCP and monitor the value. When running above the drive continuous current rating, the
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
l Check for motor overheating.
l Check if the motor is mechanically overloaded.
l Check that the motor current set in parameter 1-24 Motor Current is correct.
l Ensure that the motor data in parameter 1-20 to parameter 1-25 is set correctly.
l Running AMA in parameter 1-29 Automatic Motor Adaptation (AMA) tunes the drive to the motor more accurately and reduces
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
l Check for motor overheating.
l Check if the motor is mechanically overloaded.
Danfoss A/S © 2024.01 AU275649936274en-001401 / 130R0507 | 315
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