If you notice water dripping from the Mijia Air Conditioner Pro Eco A+++ 9K’s outdoor unit during heating, there is no need to worry. This is a normal result of the defrosting process, which helps maintain efficient heating performance in cold weather. When frost builds up on the outdoor unit, the system activates defrost mode to melt it, leading to temporary water discharge. This is not a malfunction and no action is required. The unit will continue to operate normally once the defrost cycle is complete.