Have a specific Mk5 error code you can’t find? Leave a comment below or contact your local Atlas Copco service center with the controller’s serial number.
There are multiple firmware versions for the Mk5 (e.g., Mk5, Mk5.2, Mk5.3). The manual for Mk5.3 includes expanded Modbus registers not present in older firmware. Always verify the version shown on your controller’s info screen (Menu → 7. Info → Software version). Atlas Copco Elektronikon Mk5 Manual