A washing machine, a method and computer readable recording medium. The washing machine includes a washing spindle and a spin-drying spindle, a coupling that is movable to be engaged with a rotation preventing unit of the washing machine so that power of the driving motor is transferred to the washing spindle but not to the spin-drying spindle, and is movable to a position in which the coupling is not engaged with the rotation preventing unit so that power of the driving motor is transferred to both the washing spindle and the spin-drying spindle, and a control device configured to, in a washing mode of the washing machine, bring the coupling into contact with the rotation preventing unit, cause the coupling to rotate in first and second directions so that the coupling is engaged with the rotation preventing unit, and determine an engagement state by test-operating the driving motor.