The exhaust light is broken when it is turned on.

1, the winding inductance of the exhaust fan motor, the high-voltage self-induced electromotive force generated at the moment when the exhaust fan is started, is connected in series with the led line disconnected by the switch through the distributed capacitance between the wall switch wires, which instantly forms a larger leakage current than when the inductive appliance is switched on and off, leading to the led driving start, and then the led will light up.

2. The power supply is unstable. After the exhaust fan is turned on, check whether the input voltage of LED lamp has keel and is embedded.

3, the exhaust fan has a slight series of electricity caused by unstable short circuit.