What faults and solutions may occur during the operation of ventilation equipment?

In tunnel ventilation equipment, auxiliary smoke exhaust failure may occur due to incorrect wiring of tunnel fans. Attention should be paid to wiring issues during debugging; The fan cannot be started, which may be due to the electric air valve not being fully opened (such as the blades being stuck by foreign objects, the air valve cam being faulty, or the cam stroke switch being damaged). It is necessary to check and solve the air valve problem. In the ventilation and air conditioning systems of public areas such as stations, smoke leakage may occur due to inadequate sealing of air ducts passing through walls, unclosed exhaust ducts and equipment room walls, non installation of check valves in other system ducts at exhaust ducts, and failure to turn on modular air conditioning units during fires. Targeted sealing, installation of check valves, and ensuring that relevant equipment is turned on are necessary; Poor smoke exhaust effect may be due to improper position of exhaust outlet, blocked air duct (fire damper, etc. closed), incorrect wiring phase of exhaust fan, incorrect installation of check valve direction, etc. It is necessary to adjust the exhaust outlet position, check the air duct and valve, correct the fan wiring and check valve direction; The condensation droplets may be caused by insufficient thickness and quality of insulation cotton, improper wrapping, improper setting of air supply outlets, large temperature difference between the air supply duct and the surrounding air. This can be solved by replacing the insulation cotton, standardizing construction, adjusting the position of the air supply outlet, and adjusting the air conditioning operation mode; Excessive noise from the supply and exhaust ducts and air vents may be caused by incorrect installation of mufflers in the pipes, abnormal operation of the fan, inadequate lifting brackets for the ducts, or problems with the air vent louvers. It is necessary to install mufflers, inspect the fan, standardize the installation of brackets, and clean or repair the air vent louvers.