Press the “PROG” key on the card for 3 seconds (L1 lights up).

Press “+” twice (L3 lights up).

Press “SET” once (by default, L1L2L3 are lit).

Change the force setting by pressing “+” or “-” on the card. The more lights you have on, the greater the strength.

Press the SET key once. All the lights go on and off.

Once this adjustment has been made, it is essential to carry out a new self-learning.