Method of controlling laundry treating apparatus

A method of controlling a laundry treating apparatus, the laundry treating apparatus having a case provided with a treating chamber and a cycle chamber, a moving hanger disposed in the treating chamber, a blower unit disposed in the cycle chamber, a steam unit disposed in the cycle chamber configured to heat initially a heater and then generate steam to supply the treating chamber, and a heat pump unit disposed in the cycle chamber, wherein the moving hanger provides vibration to clothing hung thereon, the blower unit circulates air of the treating chamber, the steam unit supplies steam to the treating chamber, and the heat pump unit generates heat through a refrigeration cycle using a refrigerant, the method comprising:

• performing a preheating operation by supplying power to the steam unit to initially heat the heater;
• performing, after the preheating operation has been terminated, a first cooling operation to operate the blower unit and the moving hanger;
• performing, after the first cooling operation has been terminated, a steam operation to operate the steam unit to generate steam and supply to the treating chamber;
• performing, after the steam operation has been terminated, a standby operation to operate the blower unit;
• performing, after the standby operation has been terminated, a second cooling operation to operate the blower unit;
• and
• performing, after the second cooling operation has been terminated, a drying operation to operate the blower unit and the heat pump unit and to provide heat generated by the heat pump unit to the treating chamber to dry the treating chamber,
• wherein during the first cooling operation, the blower unit is operated at a first cooling rpm,
• wherein during the steam operation, the blower unit is operated at a steam rpm,
• wherein during the standby operation, the blower unit is operated at a standby rpm, and
• wherein the first cooling rpm is greater than the steam rpm and the standby rpm.