Cause: External Interlock comes when a safety feature that requires an external switch or safety circuit to be closed before the drive can start the motor. If this circuit is open, the drive will display Alarm 60 and prevent operation.

danfoss alarm 60 reset indicates External Interlock condition. This means the drive is ready to run but is waiting for a signal on a specific terminal to enable operation.

How to Reset Alarm 60:

Follow these steps to danfoss alarm 60 reset:

• Check the External Interlock Circuit: Identify the digital input terminal on the drive's control card that is programmed for "External Interlock." This is often terminal 27, but refer to your drive's manual to confirm.
• Verify the Signal: Ensure that there is a 24V DC signal present at this terminal. The external safety circuit connected to this terminal must be closed to provide this voltage.
• Check for Open Circuits: Investigate the external safety circuit for any open switches, tripped safety relays, or broken wires that might be interrupting the 24V DC signal.
• Check Drive Parameters: Verify the parameters related to digital inputs and the "External Interlock" or "Coast Stop" functions in your drive's programming.