1. Pressure sensor failure. Pressure sensor is an instrument to detect the pressure of refrigerant. If damaged, it may lead to unstable system pressure, which may lead to FB failure. The solution is to replace the pressure sensor.
2. Failure of condenser evaporator. Condenser and evaporator are two key components in air conditioning system. If they are damaged or have problems, it may affect the cooling effect of the air conditioner and lead to FB failure. The solution is to replace the condenser or evaporator.
3. Controller failure. Controller is the core component of air conditioning system, which can control the operation and working mode of air conditioning. If the controller fails, FB of air conditioner may fail. The solution is to replace the controller or readjust the parameters of the controller.
4. Refrigerant leakage. Refrigerant is an important part of air conditioning system, which is helpful to air conditioning refrigeration. If the refrigerant leaks, the system pressure will decrease, which may lead to FB failure. The solution is to detect the leakage point and refill the refrigerant.
FB fault of central air conditioner needs to be diagnosed and repaired in time to prevent more serious damage. For large central air-conditioning systems, it is best for professional technicians to carry out maintenance and overhaul. At the same time, regular maintenance and inspection is also the key to prevent FB failure. If FB fault is found in the central air conditioner, please contact professional and technical personnel in time for handling.