What is the problem with e7 on Midea's air-conditioning screen?

There is e7 on Midea's air conditioning screen, indicating that the outdoor unit temperature sensor is faulty. First of all, check whether the wiring of humidifier and humidity sensor is normal. If there is any problem, please replace or adjust it. Then check whether the detection value of the humidity sensor is normal. If there is a problem, it is determined that the humidity sensor is faulty and needs to be adjusted. Supplementary knowledge: power on the humidifier directly and check whether the humidifier can humidify normally. If it doesn't work normally, it is determined that the humidifier is faulty and needs to be adjusted accordingly. After troubleshooting the humidity sensor and humidifier, it can be judged that the motherboard is faulty and needs to be replaced with a new motherboard. The air conditioner displays a combination of letters and numbers, indicating that there is a fault inside the machine. Be sure to check the air conditioner, find out the reason, and then repair the problem. Midea air conditioner fault code ee is proved to be a compressor phase sequence reverse connection fault. During installation, the connecting cable will be wound around the Hall feedback cable of the indoor fan or the connecting cable of the display panel, and then it will be loosened or torn off from the computer board, resulting in this failure. After passing the connecting wire through the rear frame of the indoor unit, be sure to check whether the motor wire of the internal fan and the display panel wire are entangled, or whether the two wires are pressed down and separated as far as possible.