... ,then open the switch(on back machine. red color), input four passwords (1,2,3,4 )reveal working number ... open the switch(on back machine. The red color), input four old passwords 1, 2, 3, 4 ,then ... and then open the switch(on back machine. red color) , input four passwords. The number of times is deletedAttention: If ... ,or the alarm will work ,it need to change the water or add water.5. If you need ...