Husqvarna CARDINAL 5120 User Instructions page 11

6. Press the function buttons 2 and 3 simultaneously
and keep them pressed.
The LED indicators in function buttons 1 to 3 will
flash.
7. Press function button 1 again.
The LED indicator for function button 1 will flash.
The multi-display will indicate the hardness set-
ting.
8. Pressing function button 1 increases the hardness
setting by 1 degree. (Exception: hardness setting
1 follows hardness setting 10).
9. When the hardness setting is correct, press the
ON/OFF button.
The hardness setting is now saved.
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