A newly installed air conditioner trips as soon as it is plugged in. What's the matter

A newly installed air conditioner trips as soon as it is plugged in. What's the matter

This question is about the first use of newly purchased appliances. This question actually asks two questions: First, the newly installed air conditioner trips as soon as it is plugged in. Why? Second, why does it stop tripping after removing the neutral wire? The Electrician's Home will answer this question from these two aspects.

　　 [Question 1] The newly installed air conditioner trips as soon as it is plugged in. What is the reason? How to deal with it?

　　The newly installed air conditioner trips as soon as it is plugged in. The reason is mainly from two aspects: one is the circuit problem, and the other is the problem of the air conditioner. In the circuit and the air conditioner, there are their own reasons, so we have to analyze them separately.

　　 1. Tripping caused by circuit

　　 Reason 1: The neutral wire of the socket and the ground wire are connected reversely

　　 1. In the circuit, the newly installed air conditioner will trip as soon as it is plugged in. The first possible cause is that the neutral wire and the ground wire are reversed. Then, after we plug in the plug, the leakage switch will detect that the current vector sum in the circuit is not zero.

　　 2. Because the neutral wire of our plug is actually the ground wire, this part of the current flows to the ground instead of returning to the leakage protection switch. Therefore, the leakage protection switch will trip at this time. If it does not trip, it will be abnormal.

　　 Processing method: At this time, we can remove the wall socket panel from the bottom box. Then check the connection of the wires on the terminal block. Under normal circumstances, the blue line should be the neutral line, which is connected to the left terminal. The yellow and green color is the ground wire, which is connected to the upper terminal. If the color cannot distinguish the neutral and ground wires, use the on-off gear of the multimeter to find the neutral and ground wires. Finally, connect the neutral wire and the ground wire in the correct order.

　　 Reason two, socket live wire and ground wire are reversed

　　 1. When the live wire and the ground wire on the back of the socket are connected reversely, then we plug the newly installed air conditioner into the socket panel. In fact, the neutral wire and the ground wire are connected, and the live wire is directly grounded.

　　 2. So in this case, the leakage protection switch will also detect that the current vector sum is not zero. Because the current does not return to the leakage protection switch in the normal loop. So it will definitely trip at this time.

　　 Processing method: The processing method at this time is the same as above. We need to remove the socket panel and check the specific conditions of its wiring. The standard of the socket panel wiring is: when facing the panel, the left zero and the right are grounded. According to this standard, we find the live, neutral and ground wires from the leakage protection switch and connect them to the back terminal of the socket panel. This completes the overhaul of the circuit.

Precaution:

　　 For the above two situations, in fact, we did not strictly distinguish the color of the wires when we were wiring. So when we install the home improvement circuit, we must strictly distinguish the wire colors.

　　 For conventional, we can choose one of yellow, red, and green for the fire wire; light blue for the zero wire; yellow and green for the ground wire. In this way, you can connect the wires according to the color requirements, and you will not be wrong.

　　 2. Tripping caused by air conditioning

　　 Since we are a newly installed air conditioner, it trips just by plugging the plug into the socket, so the air conditioner must not be working at this time. It cannot be a trip caused by an air conditioner overload. Then the remaining situation is to deduct a short circuit, so we have to investigate from these two aspects. =

　　 Reason 1: There is a short circuit or leakage in the wire of the air conditioner plug. Because the air conditioner comes with a power cord. The head of the wire is a triangular plug, and the outside of the wire is insulated, so it is difficult for us to see the inside. If there is a leakage or short circuit inside this wire, it will trip when the plug is inserted.

　　 Treatment measures:

　　 1. We first unplug the plug from the socket panel.

　　 2. Use a multimeter to check the air conditioner power cord. Use this to determine whether there is a short circuit inside the wire.

　　 3. Use a shaker to measure the insulation resistance of the air conditioner power cord. The standard requirement is not less than 0.5 megohm, if it is less than this value, there may be leakage. This eliminates the problem of the air conditioner power cord.

　　 Reason two: The electrical components inside the air conditioner have short circuits or leakage. Because this is a new air conditioner and has never been used, it is possible that there is a short circuit of components inside, or component leakage, etc.

　　 Solution: At this time, we should be looking for after-sales personnel of air conditioners to conduct a comprehensive investigation on our air conditioners. Here is mainly to troubleshoot the internal circuit of the air conditioner. Because the circuits inside the air conditioner are relatively professional, it is difficult for us to troubleshoot.

　　 [Question 2] The newly installed air conditioner trips as soon as the plug is plugged in. Why does it stop when the neutral wire is unplugged?

　　 There are actually two wires involved in the work of the circuit in our home, one live wire and one neutral wire. Between the live line and the neutral line is the phase voltage, that is, 220V, so as to realize the internal transmission of current to meet the normal operation of the air conditioner.

　　 Reason analysis: If we remove the neutral wire, there will be no tripping due to missing protection or open circuit breaker. This is because after the neutral wire is removed, the family circuit does not have a normal loop. At this time, there is only a live wire in the circuit, so it is impossible to form a current loop. In this case, the leakage protection switch cannot detect the leakage current. Of course, the air conditioner cannot work at this time.

　　 There are circuit failures and electrical failures in the family, what are the correct handling steps?

　　 1. Eliminate the cause of electrical appliances. For example, we have newly installed air conditioners, so at this time we need to find the after-sales maintenance personnel of the air conditioners to check our air conditioners and troubleshoot the air conditioners.

　　 2. Check the switches in our family. The switch here refers to the leakage switch. We must ensure that the leakage protection switch can operate accurately and effectively, instead of frequently malfunctioning. This eliminates the problem of the switch.

　　 Three, check the wiring of the circuit in the home. For example, a certain socket in the house trips as soon as the plug is inserted, we have to check the wiring on the back of the socket to see if it is consistent with the requirements.