How to judge the failure of the main board of the internal and external units of Midea inverter air

1. Check whether the connection cable isIf there is a problem such as lengthening or whether the connection line is firmly in contact or damaged, if there is a problem, the corresponding adjustment will be made;

2. Within the first 2 minutes of powering onCheck whether the main relay of the internal power supply has output 220V AC voltage to the outdoors, if not, it means that the indoor motherboard is faulty;

3. Measure the DC voltage between N and SIf the voltage value is a fixed value or the jump voltage value is small, it means that the internal motherboard is faulty; If the voltage value is a large jump value, it means that the external unit is faulty;

4. Check the working condition of the indicator light of the inverter external electrical control box

1) If the indicator light in the outdoor electric control box of the frequency conversion is not lit, all loads need to be unplugged, if the indicator light is bright, it means that the outdoor load is faulty, and it needs to be checked one by one; If the indicator is still not on, you need to check the reactor or inductance, and if there is a problem, you need to replace it; If there is no problem, it can be judged as an outdoor electronic control fault;

2) If the indicator light of the outdoor electric control box of the frequency conversion is slightly bright, all loads need to be unplugged, if the indicator light becomes bright, it means that the outdoor load is faulty, and it needs to be checked one by one; If the indicator light is still slightly bright, it can be judged as an outdoor electronic control fault;

3) If the indicator light of the inverter outdoor electric control box is on, it means that the inverter outdoor electric control box is faulty;

5. If the voltage jump between N and S is measured, the fluctuation scale is largeAnd the external unit has just started to work normally, then connect the inverter air conditioner detector to the outdoor electric control box to query the temperature value of the indoor T1 and T2 sensors of the air conditioner, if the indoor T1 and T2 sensor temperature can be queried normally, it means that the main board of the internal machine is faulty; If the temperature value of T1 and T2 sensors is 66, it means that the outdoor electronic control of the air conditioner is faulty.

Turn on, whether there is AC 220V between the external measuring machine L and N, if there is a DC 0---20V jump voltage between the external measuring machine N and S, if there is, the external board is faulty, pay attention, it must be the jump voltage, test it for a while. If there is no internal version failure.

The easiest way to see what is the fault is to replace the spare inner and outer boards and then check whether the inner board gives the signal to the external machine is normal and the board is not bad The outer board is normal and the signal is not bad Other reasons cause the board not to give the signal It depends on the fault** There are many reasons.

According to the fault ** displayed in the room, such as: E2, etc., corresponding to the fault ** table of the manual, the display fault problem can be known.

If you still have questions, you are welcome to ask questions to the company in the United States; I wish you a smooth work and a happy life!

Call the after-sales door-to-door inspection.

Judge the inverter air conditioner.

The method of internal and external machine failure is as follows:

1. Clearly determine the type of failure: the type of fault of the internal machine is different from that of the external machine, and distinguishing the type of fault can help determine the components that have failed. However, there are some faults that cannot be distinguished, such as refrigerants.

leaks, communication failures.

2. Inquire about the detailed brand and model of the air conditioner: You can query the fault code of the machine on the network to find out the detailed information of the air conditioner.

3. Query the general remote control code to determine the specific fault.

Note: When determining the type of fault, strictly follow the review steps, otherwise there is a possibility of destroying the machine.

It is necessary to make a comprehensive judgment according to the type of fault that occurs in combination with other fault phenomena.

Generally speaking, most of the problems with the main control panel of household split wall-mounted or cabinet air conditioner are the main control panel of the indoor unit.

This is not necessarily the case with other types of split system air conditioners.

You can also find the electrical wiring diagram given by the product manufacturer in the installation and use manual for a closer look.

1. Check whether the connection cable isIf there is a problem such as lengthening or whether the connection line is firmly in contact or damaged, if there is a problem, the corresponding adjustment will be made;

2. Within the first 2 minutes of powering onCheck whether the main relay of the internal power supply has output 220V AC voltage to the outdoors, if not, it means that the indoor motherboard is faulty;

3. Measure the DC voltage between N and SIf the voltage value is a fixed value or the jump voltage value is small, it means that the internal motherboard is absolutely chaotic fault; If the voltage value is a large jump value, it means that the external machine is faulty;

4. Check the working condition of the indicator light of the inverter external electrical control box

1) If the indicator light in the outdoor electric control box of the frequency conversion is not lit, all loads need to be unplugged, if the indicator light is bright, it means that the outdoor load is faulty, and it needs to be checked one by one; If the indicator is still not on, you need to check the reactor.

Perhaps the inductor, if there is a problem, it needs to be replaced; If there is no problem, it can be judged as an outdoor electronic control fault;

2) If the indicator light of the outdoor electric control box of the frequency conversion is slightly bright, all loads need to be unplugged, if the indicator light becomes bright, it means that the outdoor load is faulty, and it needs to be checked one by one; If the indicator light is still slightly bright, it can be judged as an outdoor electronic control fault;

3) If the indicator light of the inverter outdoor electric control box is on, it means that the inverter outdoor electric control box is faulty;

5. If the voltage jump between N and S is measured, the fluctuation scale is largeAnd the external unit just starts to work normally, it will be inverted air conditioner.

The detector is connected to the outdoor electronic control box, query the temperature value of the T1 and T2 sensors in the air conditioner room, and if the temperature of the indoor T1 and T2 sensors can be queried normally, it means that the motherboard of the internal machine is faulty; If the temperature value of T1 and T2 sensors is 66, it means that the outdoor electronic control of the air conditioner is faulty.

This kind of judgment generally requires a certain amount of experience in air conditioning maintenance, usually can only use the following methods to make a preliminary brief judgment, when there is a problem, it is best to let professional maintenance personnel to carry out maintenance, the steps of the preliminary judgment are as follows: 1. First of all, the power plug of the air conditioner is removed from the socket, and the insulation protection work is done. 2. After the safety measures are taken, connect a 220V wire to the two LN ports of the outdoor unit.

3. Then power on the outdoor unit, pay attention to observe whether the compressor of the outdoor machine and the fan of the outdoor unit can work normally, if it can, it means that the motherboard of the outdoor unit is not broken, otherwise, it means that the motherboard of the outdoor unit may have been damaged. The above methods can only make the most basic judgment on the quality of the room destroyer's external machine, but the specific is that it is broken, there is a problem on the motherboard, whether it needs to be repaired or it needs to be replaced with a new motherboard or spare parts, we need to call a professional maintenance master to test, we had better not disassemble it ourselves, so as not to cause safety accidents or secondary damage to the air conditioner. Under normal circumstances, when there are some failures in large electrical products at home, in addition to the reasons caused by human control, it is best to ask a professional to deal with it in other cases, after all, personal safety is the most important.

Summary. Midea's air conditioner has changed the motherboard, and it is broken again, what is the reason?

Hello, dear, what is the reason why Midea's air conditioner is always broken motherboard?

What is the reason for the failure of the motherboard of the air conditioner?

Taking Midea KFR-35GW N8MCA1 air conditioner as an example, the reasons for the failure of the main board of the air conditioner include the following points:

1. It may be that when using the air conditioner, the voltage instability at that time caused the current to be too large, so the motherboard was burned out.

2. It is also possible that the motherboard is broken due to water ingress into the position of the electronic control parts of the air conditioner, causing the motherboard to be short-circuited.

3. It is also possible that the air conditioner is frequently started due to other faults, and the motherboard is easy to break if it is overloaded.

I hope it can help you, if my answer is helpful to you, please give a like (rate in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress. Finally, I wish you good health and a good mood!

Midea air conditioner motherboard broken performance.

Midea's air conditioner has changed the motherboard, and it is broken again, what is the reason Hello, dear, what is the reason why Midea's air conditioner is always broken motherboard? What is the reason for the failure of the motherboard of the air conditioner? Taking Midea KFR-35GW N8MCA1 air conditioner as an example, the reasons for the failure of the main board of the air conditioner include the following points:

1. It may be that when using the air conditioner, the voltage instability at that time caused the current to be too large, so the motherboard was burned out. 2. It is also possible that the motherboard is broken due to water ingress into the position of the electronic control parts of the air conditioner, causing the motherboard to be short-circuited. 3. It is also possible that the air conditioner is frequently started due to other faults, and the motherboard is easy to break if it is overloaded.

I hope it can help you, if my answer is helpful to you, please give a like (rate in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress. Finally, I wish you good health and a good mood!

Midea air conditioner motherboard is broken performance Hello, dear, 1. Once the motherboard of the air conditioner is damaged, the indicator light will not light up at this time. In addition, there are some brands of air conditioners that will directly display faults**, such as display E1, E5, etc., but different brands, their display** are different, but they are related to the motherboard. 2. In addition, there is one of the most direct manifestations is that the air conditioner is used well, and it suddenly crashes.

If you unplug the socket later, plug it back in, and turn it back on again, you can basically judge that there is a problem with the motherboard. I hope it can help you, if my answer is helpful to you, please give a like (rate in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress. Finally, I wish you good health and a good mood!

Summary. Hello dear! We'd be happy to help you with your questions!

The method of judging the failure of the main board of the internal and external units of the Midea inverter air conditioner: 1Check whether the connecting line is lengthened or whether the connecting line is firmly connected or damaged, and adjust it accordingly if there is a problem; 2.

Check whether the main relay of the internal power supply outputs 220 V AC voltage to the outside within the first 2 minutes of powering on, if not, it means that the indoor motherboard is faulty.

Hello dear! We can help you answer your questions! The method of judging the failure of the main board of the internal and external units of the Midea inverter air conditioner:

1.Check whether the connecting line is lengthened or whether the connecting line is in contact with the firm or damaged, etc., and adjust it accordingly if there is a problem; 2.Check whether the main relay of the internal power supply outputs 220 V AC voltage to the outside within the first 2 minutes of powering on the power supply, if not, it means that the indoor motherboard is faulty.

3.Measure the DC voltage between N and S, if the voltage value is a fixed value or the large value of the jump voltage bridge is small, it means that the internal machine motherboard is faulty; If the voltage value is a large jump value, the pants are closed and the external unit is faulty. Hope mine is helpful to you!

Thanks for asking! I wish you a happy life!! <

According to the situation you described, 1. The external machine does not work: check whether there is a 220 volt voltage in the external machine after the first mountain starts. Otherwise, check whether the connection channel of the indoor and outdoor units is correct, and whether the connection of the main board of the indoor unit is correct.

Otherwise, replace the internal unit motherboard. 2. The internal unit is not working: Please check whether the power connection cable (internal and external unit) is correct and whether the power cable is grounded.

If the preceding items are normal, replace the internal master control board. 3. When the environmental temperature sensing package of the outdoor unit is short-circuited: it will not be affected during refrigeration, and the heating time and space will be adjusted for low-frequency operation, and the frequency will not rise.

4. After the compressor overheat protector is protected, stop the outdoor unit, the indicator light of the main board of the outdoor unit flashes, and the unit cannot be started for a long time.