Have a problem with a DMU 50 V that sets the error code I05 when I press the start button. What can trigger that error code apart from the emergency stop switch , switch to the door and the switch for the windows slide in the tool magazine.
Things that have been replaced in the security chain, door switch / lock (16A4) and the emergency stop button (S1) and start button (6SH1).
All protective plates and doors are removed from the machine because the machine was higher than the door into the workshop, and to access and service the machine and clean it.
Keys are in the switches for the tool magazine and the main door.
Any suggestions on solving the problem are greatly appreciated.

/Tobias