对FFU风机过滤单位举行得当的维护调养可以进步FFU风机过滤单位的寿命，对企业节流肯定的用度。

一、依据情况的干净度，FFU风机过滤单位改换过滤器（初效一样平常为1-6个月，高效一样平常为6-12个月,高效过滤器不行洗濯）。

二、活期（一样平常每两个月一次）用灰尘粒子计数器测定用本产品实行污染的干净地区的干净度，当实测的干净度与要求的干净度不符时，应查明缘故原由（能否有走漏、高效过滤器能否有生效等），若高效过滤器已生效，则应改换新的高效过滤器。

三、改换高效过滤器及初效过滤器时应停机举行。

四、FFU风机过滤单位改换高效过滤器时应留意以下事变：

1、FFU机过滤单位改换高效过滤器时应分外留意拆箱、搬运及安置取用时确保滤纸完备无损，克制用手触及滤纸形成破坏。

2、FFU安置前，将新的高效过滤器对着亮处，以肉眼察看高效过滤器能否因运输等缘故原由而呈现破坏，如滤纸有毛病则不克不及利用。

3、FFU改换高效过滤器时应起首将箱体抬起，然后将生效的高效过滤器取出，换上新的高效过滤器（留意高效过滤器的气流箭头标记应与污染单位出习尚流偏向分歧），确保边框密封后将箱盖回原位。

The proper maintenance of the FFU fan filter unit can improve the life of the FFU fan filter unit and save the enterprise a certain cost.

1. According to the cleanliness of the environment, the FFU fan filter unit changes the filter (the initial effect is usually 1-6 months, the efficiency is generally 6-12 months, and the efficient filter is not to be cleaned).

2. On a regular basis (usually once every two months) with dust particle counter measure with this product purification clean area cleanliness, when measured cleanliness does not accord with requirement of cleanliness, should find out the reason (if there is leakage, high efficiency filter, etc.) if there is a failure, if efficient filter has failed, it should be replaced a new hepa filter.

3. When replacing the high efficiency filter and the initial filter, the machine should be stopped.

4. FFU fan filter unit should pay attention to the following items when replacing the efficient filter：

（1）The FFU filter unit should pay special attention to the removal, handling and installation of the filter when replacing the efficient filter. The filter paper is intact and the paper is prohibited to touch the filter paper to cause damage.

（2）Before the FFU is installed, the new high efficiency filter will be applied to the light to see whether the high efficiency filter can be damaged due to transportation and other reasons. If the filter paper has a loophole, it cannot be used.

（3）Head to replace hepa filter should be the first to raise box body, and then the failure of high efficiency filter, change into a new high efficiency filter (note that the flow arrow symbol of hepa filter shall be the purification unit of blast in the same direction), to ensure that the border will cover back in place after the seal.