Explosion-proof electric hoist shall not be replaced at will. If the explosion-proof electric chain hoist doesn't work after the power supply is connected, we can first check whether the power supply has electricity with an electric pen. If there is nothing wrong with the power supply, the lines in the explosion-proof electric chain hoist can be tested to see if there are any phenomena such as poor contact, short circuit, open circuit, etc. Once problems are found, the equipment should be immediately sent to specialized personnel for maintenance to prevent the motor from burning out due to the lack of phase of the power supply. Some parts of explosion-proof electric hoist are different from conventional electric hoist, so they shall not be replaced at will.