Enter the password 111111 in the settings menu. Jade Bird circuit board is a product produced by Beida Jade Bird Fire Protection Institute. It is a patented product of Beida Jade Bird. It has functions such as short circuit protection, overload protection, leakage protection, overvoltage protection, undervoltage protection, and phase loss protection. Enter the password 111111 in the setting menu. , the circuit board fault can be deleted.