1, the high efficiency air filter surface black, to accommodate more dust, the resistance increases, that is, remove the high efficiency air filter within the non-woven cleaning, or be replaced.
2, regular (usually 1-2 times per year) check the nozzle speed, if not meet the technical requirements, you should replace the high efficiency air filter.
3, the replacement, it should be noted that the new high-performance air filter model specifications and the original high-efficiency air filters in line with high efficiency air filter paper wood structure, installation should be careful not to touch the border, damaged filter paper.
4, the replacement of high efficiency air filter, you must remove the nozzle active plate, the high efficiency air filter removed, replaced with a new high-performance air filter, should pay attention to high efficiency air filter arrow signs, arrows for airflow direction.
5, the replacement of the new high efficiency air filter must be confirmed: the filter and the sealing material and support the filter between the frame there is no leakage.
6, regular electrical circuit checks.
