Danfoss VLT AutomationDrive FC 302 Operating Manual page 118

Operating Guide | VLT® AutomationDrive FC 302
Troubleshooting
• Clear the external fault condition.
• To resume normal operation, apply 24 V DC to the terminal programmed for external interlock.
• Reset the drive.
8.4.59 WARNING/ALARM 61, Feedback Error
Cause
An error between calculated speed and speed measurement from feedback device.
Troubleshooting
• Check the settings for warning/alarm/disabling in parameter 4-30 Motor Feedback Loss Function.
• Set the tolerable error in parameter 4-31 Motor Feedback Speed Error.
• Set the tolerable feedback loss time in parameter 4-32 Motor Feedback Loss Timeout.
8.4.60 WARNING 62, Output Frequency at Maximum Limit
Cause
The output frequency has reached the value set in parameter 4-19 Max Output Frequency.
Troubleshooting
• Check the application for possible causes.
• Increase the output frequency limit. Be sure that the system can operate safely at a higher output frequency.
The warning clears when the output drops below the maximum limit.
8.4.61 ALARM 63, Mechanical Brake Low
Cause
The actual motor current has not exceeded the release brake current within the start delay time window.
8.4.62 WARNING 64, Voltage Limit
Cause
The load and speed combination demands a motor voltage higher than the actual DC-link voltage.
8.4.63 WARNING/ALARM 65, Control Card Overtemperature
Cause
The cutout temperature of the control card has exceeded the upper limit.
118 | Danfoss A/S © 2019.12
Maintenance, Diagnostics, and
Troubleshooting
AQ275652476278en-000101 / 130R0709