How I CAN CANCEL CODE U2 in sharp arm451n - Sharp Office Equipment & Supplies

This resets the code
Sim 16 sub 0 Used to cancel the self diag "U2" trouble. Cancel Trouble Error
SIMULATIONS
1. Entering the simulation mode
Enter the copy mode and perform the following procedures.
[P] [*] [C] [*] [Main code] [START] [Sub code] [START]
2. Switching the simulation mode
Press [USER SETTING] to return to the code entry screen.
3. Canceling the simulation mode
Press CA key to cancel the simulation mode.
You may need to have a tech look at this.
Hope that helps

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Thank you for everything.

hussein al-hadrawy