Control apparatus and method for compressor

The invention comprises a by-pass device and a control unit for connecting the discharge side and suction side of the compressor. The control unit activates the case with the start-up request for a non-operating state after the compressor discharge side and down to the suction-side pressure of the compressor of the inoperative state by using the by-pass device is stopped compressor. According to the present invention may therefore, using the by-pass device activates the compressor stops in a state of pressure equilibrium achieved prevent activation defects arising excessive pressure car and improve the reliability of the compressor.