Your watch needs to be reset to normal operation. This is probably done by pressing the "mode" button but as I not very familiar with this watch, I am not sure about this.

If you have lost your instructions You can get them from the Citizen web site.

Go to "citizen.com" and on the upper right there is a menu. Click on "technical support" and then on "setting instructions"

Fill in the information required from the back of your watch and then click on "get setting instructions"