Programming Guide | VLT® AutomationDrive FC 360
WARNING/ALARM 61, Feedback Error
Cause
An error between calculated speed and speed measurement from feedback device.
Troubleshooting
l Check the settings for warning/alarm/disabling in parameter 4-30 Motor Feedback Loss Function.
l Set the tolerable error in parameter 4-31 Motor Feedback Speed Error.
l Set the tolerable feedback loss time in parameter 4-32 Motor Feedback Loss Timeout.
WARNING/ALARM 62, Output Frequency Limit
Cause for Flux Mode
If the output frequency reaches the value set in parameter 4-19 Max Output Frequency, the drive issues a warning. The warning ceases
when the output drops below the maximum limit. If the drive is unable to limit the frequency, it trips and issues an alarm. The latter may
happen in the Flux mode if the drive loses control of the motor.
Troubleshooting for Flux Mode
l Check the application for possible causes. The load torque could be too significant to drag the motor run to a high speed.
l Increase the output frequency limit. Ensure that the system can operate safely at a higher output frequency.
Cause for VVC TCL Mode
The output speed limit is reached, and the torque reference is derated. If the system is designed to reduce the speed by speed limit
function, the warning only means that the speed limit is active.
Troubleshooting for VVC TCL Mode
l The system speed exceeds the speed limit, in this case, adjust the system speed or adjust the speed limit.
l If the speed limit function is used to control system speed, the warning can be ignored.
ALARM 63, Mechanical Brake Low
Cause
The actual motor current has not exceeded the release brake current within the start delay time window.
WARNING 64, VOLTAGE LIMIT
Cause
The load and speed combination demands a motor voltage higher than the actual DC-link voltage.
Troubleshooting
l Check if the mains input is not high enough.
l Check if the output frequency is too high above motor nominal frequency.
WARNING/ALARM 65, Control Card Over Temperature
Cause
The cutout temperature of the control card has exceeded the upper limit.
Troubleshooting
l Check that the ambient operating temperature is within the limits.
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