Notice 1. Clean the shell of the machine after the normal work each time, wipe with a dry cloth or shovel shovel not rinse with water, clean off the power to avoid leakage. 2. If the machine is faulty, you must have a professional electrical maintenance certificate to repair the master before use. Installation Precautions 1. Machine should be placed in dry, clean, ventilated and horizontal position, the operation of the machine should be smooth. If necessary, install exhaust ventilation settings. 2. Be sure connected to a reliable safety grounding device for safety reasons.