Warning /Alarm 62 in danfoss VLT FC360 drive : Output Frequency Limit - comes when 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

1. Check the application for possible causes. The load torque could be too significant to drag the motor run to a high speed.
2. Increase the output frequency limit. Ensure that the system can operate safely at a higher output frequency.

Cause for VVC TCL Mode

1. 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

1. The system speed exceeds the speed limit, in this case, adjust the system speed or adjust the speed limit.
2. If the speed limit function is used to control system speed, the warning can be ignored.