The internal machines are uneven.
Check the level of the internal machine. Whether it is left low and right high, or right low and left high, a slight unevenness may lead to water leakage.
Excessive indoor and outdoor temperature difference
Whether the indoor and outdoor temperature difference is large or the indoor room temperature is high, after turning on the air conditioner, hit the temperature to the lowest, let the indoor machine cool down at once, and water droplets will be generated at the fan of the machine.
Internal machine installation problem
The indoor unit is a little off, and the water is flowing downwards against the wall. See if there is any problem with the installation of the internal machine.
Find Gree maintenance personnel.
If these three points are all right, it's missing again. Then be sure to find Gree's maintenance personnel for maintenance.