These differences "220V Cooling Fan" of structure and control, resulting in the method in dealing with these failures are also different use. When a fan fails, the most common exclusion is to find the same type of fan to be direct with the change, but some equipment is the model of special-shaped fan, which is the same type of "220V Cooling Fan" is more difficult to find in the market, or put the same type of fan is still alarm (the reasons discussed later), then the fan can be repaired. Before servicing the fan, first of all, to understand the knowledge of these fan types, structure and methods of control. Second, to understand the common "220V Cooling Fan" the type of fault.