You first need to "220V Cooling Fan" for regular inspection, if found to fan vibration at work, you need to remove the fan, check whether it is caused due to loose fan, or fan bearing wear resulting in, then we need The "220V Cooling Fan" fan ministries after strong convergence of fixed can greatly solve the problem. This problem was not much, but if the long-term in this state, it will cause more serious damage or accidents. Second, pay attention at work is usually sound "220V Cooling Fan" issued, if there is noise, we need to consider the attached bearing insufficient lubrication, noise if this is the case, you need to add oil to the fan bearing, regularly check the fan bearing lubrication is necessary.