On air, exhaust fan maintenance: (1) whether the combustible air around the room; the mounting bolt is loose, injury; (2) the transmission mechanism for deformation, damage; impeller is in contact with the housing; and (3) of the motor Wiring is loose; the motor housing for corrosion phenomena; (4) Power supply is normal (check voltmeter or power indicator). If (5) Check the bearing portion lubricant abnormal state (dirty, mixed with sand, dust, etc.); (6) Check motor oil level is normal bearing parts; (7) Check for loose drive belts exhaust fan liter Switzerland, coupling is solid; (8) to start the motor exhaust fan rotate without abnormal vibration, noise. Exhaust fan exhaust fan can also save energy is a good exhaust fan blower goods principle, and recommended referral at 280 ℃ when the quality of continuous mission 30min exhaust fan pictures, and in the quality of the cooling medium to a temperature when still continuous normal operation. But as our power has been reduced, we constantly improve conservation, exhaust fans can be more effectively save energy. Exhaust fan Specifications | exhaust fan | liter by liter Rui Rui Electrical and Mechanical Ventilation and Air Conditioning Electrical Equipment Factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Swiss mechanical and electrical liter into the brilliant and you work for a better future!