The first is for the "220V Cooling Fan" routine cleaning and maintenance work. For this type of cooling devices, in use for some time there will inevitably be some dust and other material attached to the top, so that not only looked dirty, but also the radiator fan will produce a very normal cooling function big impact, so that the periodic "220V Cooling Fan" corresponding dust cleanup is necessary. In addition, the clean-up at the same time, we also note the use of such equipment, components, and parts to see if there are unusual circumstances, when in use to avoid impact on the operation of the relevant "220V Cooling Fan".