Dürkopp Adler 271-140331 Instructions D'emploi page 208

Exiting the "Mechanic Level (B)" and saving the change
–
Press the 6 (T/E) key (not lit), the mechanic level is exited and the changes are
saved to memory.
–
Sewing is possible again.
Activating the "Special Level (C)"
–
Activate the mechanic level (B) see 8.2.6.
–
Set parameter <798> to I.
–
Press the 6 (T/E) key (the LED is dark).
–
Turn the main switch off and wait more than 2 seconds.
–
Turn the main switch on.
–
Press the 6 (T/E) key (the LED is lit).
–
The right half of the display shows the first value at the "Special Level (C)".
–
The correction of the parameter values and the calling-up of further parameters is
possible in the same manner as described for the "Mechanic Level (B)".
Exiting the "Special Level (C)" and saving the change
–
Press the 6 (T/E) key (not lit), the changes are saved to memory.
–
Turn the main switch off, the special level is exited.
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ATTENTION!
The changing of the parameter values must be conducted
very carefully because incorrectly set drive controls can
damage the machine!
All parameter values can be returned to the preset values
through a master reset. See Chapter 8.2.10.
ATTENTION!
This level contains control parameters whose values must
only be changed in exceptional circumstances. A change in
these parameters may only occur after consultation with
DÜRKOPP ADLER.