When you replace the print head and the counter is cleared, the value of [Head 2] appears in [Head 3], and the value of [Head 1] appears in [Head 2]. [Head 1] will start to count from 0 again.
If you have enabled the password input, you must enter the password set in the [Password] menu before the Settings menu will open.If you have enabled the password input, the printer requires you to enter the password set in the [Password] menu before you can download the package file.