Cause : External Interlock - comes when a digital input signal indicates a fault condition external to the drive. An external interlock has commanded the drive to trip.

An AL-060 external interlock is a safety feature commonly found in Danfoss VLT variable frequency drives (VFDs). It allows external devices to control the operation of the motor connected to the VFD, prioritizing safety in case of potential hazards.

1. Clear the external fault condition.
2. To resume normal operation, apply 24 V DC to the terminal programmed for external interlock.
3. Reset the drive.