2. Fan Capacitor Issues; Fault Symptoms: Poor cooling effect, no obvious change in wind speed. Cause Analysis: The air conditioning usage site is a clothing factory workshop, with a usage area of 350 square meters, and a total of 5 five-horsepower floor-standing units installed. Users reported that the air conditioner had been repaired many times this year, but the results were never satisfactory. Maintenance personnel added refrigerant and replaced the electronic control board, among other actions, which caused great dissatisfaction from the users. Careful examination revealed that the air conditioning voltage was 380V, current at 9A, and low-pressure pressure at 5kg, all within normal parameters. However, the outlet temperature was abnormally high. Based on the above data analysis, it was preliminarily determined that the issue was due to insufficient airflow. Possible reasons: Data Source: Beijing Midea Air Conditioning Repair Center http://blog.163.com/mideaktiao_2012/.
3. Dirty Filter Nets and Evaporators; Upon checking the airflow, it was found that the airflow was very small. Inspection of the fan and capacitor showed they were in good condition. Adjusting the wind speed (high, medium, low) to determine the fan speed, there was a clear sound of the fan relay engaging in three gears, but no significant change in wind speed, thus ruling out electrical faults. It was determined that the problem might be caused by dirt blockage in the evaporator. After dismantling the indoor unit panel for observation, it was found that the back of the evaporator was stuck with a lot of fabric fibers, and there was frost formation on the evaporator.
Resolution Measures: After cleaning the indoor unit evaporator, the airflow returned to normal, and the cooling function worked properly.
Experience Summary: In some special places like garment factories, hair salons, textile mills, and other public places where dust is abundant, poor air conditioning cooling effects are generally due to poor heat dissipation and blockages caused by dirt. Therefore, one should first check if the filter nets and evaporators are clean. When repairing such faults, external factors should be ruled out before considering machine faults, and one should first check whether the airflow of the indoor and outdoor units is normal; whether the environmental temperature is too high; whether the heat dissipation of the indoor and outdoor units is good, and finally check the system itself to avoid unnecessary detours.
4. Main Electronic Control Board Issues. Midea air conditioners, poor cooling effect, no obvious changes in wind speed. 1. Fan problems;