Washing machine, method for controlling washing machine, and computer readable recording medium

A control method of a washing machine including a washing spindle, a spin-drying spindle, a driving motor, a rotation preventing unit, and a coupling that is movable to be engaged with the rotation preventing unit 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, the control method comprising:

• bringing the coupling into contact with the rotation preventing unit and rotating the coupling in first and second directions to engage the coupling with the rotation preventing unit in response to a washing mode starting;
• determining an engagement state of the coupling and the rotation preventing unit by test-operating the driving motor;
• and
• performing a washing operation in response to the determined engagement state indicating that the coupling is correctly engaged, and re-engaging the coupling with the rotation preventing unit in response to the determined engagement state indicating that the coupling is incorrectly engaged.

A computer readable recording medium having a program for executing a control method of a washing machine including a washing spindle, a spin-drying spindle, a driving motor, a rotation preventing unit and a coupling that is movable to be engaged with the rotation preventing unit so that power of the driving motor is transferred to the washing spindle but not to the spin-drying spindle, and is movable 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, wherein the program, when executed by a computer, causes the computer to execute processes including:

• bringing the coupling into contact with the rotation preventing unit and rotating the coupling in first and second directions to engage the coupling to the rotation preventing unit in response to a washing mode starting;
• determining an engagement state of the coupling and the rotation preventing unit by test-operating the driving motor;
• and
• performing a washing operation in response to the determined engagement state indicating that the coupling is correctly engaged, and re-engaging the coupling with the rotation preventing unit in response to the determined engagement state indicating that the coupling is incorrectly engaged.