Led light is turned off and the cause of weak light, and how to deal with it

Led is very common in daily life. When using it, did you find a problem that the Led light turned off and the light was weak? Have you noticed this situation? What is the reason for the low light when the Led light is turned off? In this case, how should I repair it? In this case, how should I repair it?

 

1. The Led light is turned off and the cause of weak light:

Reason 1: The switch is connected to the neutral wire, causing the neutral wire to be reversed.

 

In fact, electricians almost never make this kind of mistake, and the zero live wire of the whole house is all upside down. This situation is usually caused by the change of the external zero live wire. Just change the bus at the main switch position of the house. The problem can be solved.

Reason 2: The neutral line is live.

 

1. This situation is more common, which is why the light will be on when measuring two wires with an electric pen. The neon bulb of the electric pen will light up as long as there is a voltage of 20 to 30 volts. Therefore, ordinary electricians still prefer to use a universal meter. .

 

2. The reason why the neutral line is charged is generally caused by the neutral point drift of the transformer. The neutral point drift causes not zero voltage. You can do a small experiment. Put the neutral line on the wall and test it with an electric pen. The light bulb will not light up.

Led light is turned off and the cause of weak light, and how to deal with it

2.the solution to the low light when the Led light is turned off

1. The zero line of fire is reversed

(1) First pull down the main light switch to see if the light is still on. If it is still on, it may be the power source taken from the socket circuit breaker. Then pull down the socket switch and it should not light up.

 

(2) After confirming the fault, with the power switch pulled down, turn off the fault light switch and disassemble the switch. Use an electric pen to test whether there is electricity, and determine whether the neutral wire is the live wire.

 

(3) If the neutral wire is indeed connected, the live wire can be connected to the switch. During operation, the power must be cut off. By the way, it can be temporarily powered on by judging whether the live wire or the neutral wire is used.

 

2. The neutral line is live

(1) Under normal circumstances, 90% of the LEDs are lit because the neutral line is charged. Repairing the transformer is not practical. You can only work on the lamp. You can insulate the LED lamp from the wall. Install plastic pads between the walls.

 

(2) Another way is to install a relay in the lamp and disconnect the zero live wire at the same time. Because the zero wire is directly connected in the installation of the lamp, this method can solve the problem of the weak light of the LED.

 

The above is the content of the reason why the LED light is turned off. After reading, I know the two reasons for this failure. As long as you have knowledge of electricians, you can fix it. It is not a big problem.


Post time: Sep-18-2021 BACK