1. Motor: Use a cross screwdriver to open the internal air duct cover of the equipment for testing. Use an open-end wrench to first remove the outer hex nut, pull out the wind turbine, and then use an internal hex wrench to remove the motor screws;

2. Wind turbine: Use a cross screwdriver to open the internal air duct cover plate of the equipment for testing, and use an open-end wrench to remove the outer hex nut and pull out the wind turbine;

3. Refrigerant: Find the connecting pipe between the refrigerant bottle and the compressor, pay attention to the refrigerant brand indicated on the compressor, open the refrigerant bottle valve after connection, and check the pressure. The compressor can be used indoors or outdoors;

4. Controller: Use a Phillips screwdriver to open the upper and lower screws, and then use a Phillips screwdriver to unscrew the screws that fix the screen;

5. Printer: Use a fixed key to open the side or top cover of the device, clamp the movable tongues on both sides of the printer with your fingers, and punch in the panel cover. Use a Phillips screwdriver to loosen the printer fixing screws and unplug the printer connection cable.