What to do if the Mijia Air Conditioner displays error code P4?

If the Mijia Air Conditioner displays the error code P4, it indicates overheating protection for heating.
You can troubleshoot it by the following steps:
1. Turning on the heating function in a high temperature environment is a normal protection. If the heating effect is good, it is a normal protection caused by the high outdoor temperature and no action is required;
2. The indoor unit filter is too dirty. Please clean the filter;
3. If the above steps do not resolve the issue, please apply for the after-sales service center for inspection.