Cause: Button disabled comes when the buttons on the LCP might be intentionally disabled through the parameter settings. If the drive is configured for remote control via fieldbus (e.g., Profibus, Ethernet) or digital inputs, the local buttons might be disabled to prevent conflicting commands.

danfoss error 85 indicates "Button disabled" on the Local Control Panel (LCP). This means that the buttons on the LCP are currently not active and cannot be used to control or program the drive.

Troubleshooting Steps:

Follow these steps to correct danfoss error 85:

• Access the parameter menu of the drive, if possible through other means (e.g., commissioning software).
• Ensure that there isn't a parameter set to disable the local buttons. Refer to your specific Danfoss drive manual for the relevant parameters.
• Check if the drive is currently in a remote control mode. This might be indicated on the display or through specific parameters in the control mode settings.
• If remote control is active and you need local control, you might need to change the control mode parameter.