My electric meter shows that the air switch of ERR-56 always trips. I once thought it was the wall socket, so I changed everything and jumped.

"I suggest you try to turn off the air switch, disconnect the load end of the air switch, and then close the air switch to see if it trips.

There are two possible reasons for tripping;

First, the household electricity load is too high during the peak period. At the beginning, the capacity you reported to the power supply enterprise was insufficient. I suggest you apply to the power supply enterprise for capacity increase. Specifically, you can pay attention to and bind the public service platform of China Southern Power Grid 95598 > My Power Consumption > Business Processing > Business Change > Select Capacity Expansion > Fill in the handling information, manager information and SMS verification code, and click OK.

Second, if the reported capacity is sufficient, it may be that the rated current of your air switch is too small to meet the electricity load of your home, or that the leakage switch trips due to line leakage. It is recommended that you entrust a qualified electrician to check for you. "