How to modify the circuit of the Mitsubishi air conditioner with the Hisense internal unit

- Is the air conditioner malfunctioning? With my 7 years of experience in repairing air conditioners, I will tell you how to solve these faults, which should save you a lot of detours.

First: When the air conditioner fails, you can go to the [air conditioner failure** network] to inquire, down to the brand and model of the air conditioner.

When encountering a failure of the air conditioner, we must strictly follow the scientific procedures, and do not act blindly and disassemble at will when the situation is unclear, the fault is unclear, and there are countless in the heart. The consequence of this often amplifies existing faults, increases operating costs, shortens the normal service life of equipment, and leads to early scrapping of equipment.

The air conditioner is not refrigerated or does not refrigerate.

This problem is most common, and the lack of fluorine in air conditioners is the key.

When the machine is turned on, first touch the trachea and judge it by the temperature.

If it is cold, the speed of the fan may be low.

The inner tube scales and dust are cleaned or replaced.

If the inner tube is not considered cool, the thick tube may be flattened.

The return air temperature is not cool, and then touch the intake air to judge.

The air intake is cold and frosty, and fluoride is added to try again.

If the frost slowly disperses, it is a good decision to lack fluoride.

It is not difficult to see the aging of the press, and the lack of exhaust is the key.

Four-way gas is also commonly judged by fluoride collection.

High-pressure scales must be seen to be dirty, and they will be slow to refrigerate.

If you still don't understand, it is recommended that you go to the [Air Conditioning Fault **Net] basic knowledge area and take a look at the maintenance cases to get started.

I hope you get better and better, and the new year will be smooth, all your wishes will come true, you will be healthy, and your family will be happy.

- Finally, I wish you all the best in your work, fix the air conditioner as soon as possible, and live happily ———

- If you think it's good, please click on the answer, give a good review, and wish you a better life———

Dear Hisense users, hello!

It is not recommended that you make such a match, because each product has different software agreements, so it cannot be used in conjunction with each other.

If you need help, call 40-06-11-11-11 Hisense Kelon Air Conditioner National Unified 24-hour Service**! During the three-guarantee period, we provide free door-to-door service, and we provide free consultation or paid door-to-door service outside the three-guarantee period.

The fixed frequency can be, and the frequency conversion can not line.

You can make a fuss about the temperature sensor resistance in the indoor environment, but it is estimated that the fault will be reported.

Can be the reason for the voltage: check whether the power supply of the external unit is electric or whether the voltage reaches the rated voltage. If it is not the cause of low voltage, please check whether the indoor and outdoor units are connected correctly, whether the wires are aging, and whether the motherboard of the indoor unit is wired correctly, otherwise replace the motherboard of the internal unit.

If the indicator light is not on, check whether the external unit connection line is loose, and whether there is a direct voltage of about 300V between P+ and N- of the power module, if not, check the reactor, rectifier bridge and wiring.

If there is, but the indicator light of the motherboard of the external unit is not lit, first check whether the signal connection cables from the power module to the motherboard (a total of 10) are loose or poorly contacted, and then replace the power module, when replacing the module, the heat dissipation paste must be evenly coated between the radiator and the module.

According to the fault phenomenon, focus on checking the control circuit of the outdoor unit. This outdoor unit control circuit is mainly composed of switching power supply circuit, voltage detection circuit, current detection circuit and the like. The control circuit of the outdoor unit and the switching power supply circuit provide a stable working power supply for the work of the outdoor unit.

The machine adopts self-excited switching power supply, and its voltage stabilization mode adopts pulse width modulation mode.

Maintenance method: Troubleshooting after replacing Q01 and ZD02 with the same model.

Fault judgment method:

The basic methods for judging the common faults of household air conditioners are: looking, listening, touching, measuring and analyzing.

1. Look: Carefully observe the working conditions of each component of the air conditioner, focusing on the three parts of the refrigeration system, electrical system and wind system, and judge whether they are working normally.

Refrigeration oil), you can also use a clean soft cloth and soft paper to wipe the connection between the pipe weld and the joint, and observe whether there is oil stain to judge whether there is leakage.

2. Listen: Turn on the power and listen carefully to whether the air conditioner compressor is running normally, whether there is abnormal sound, whether there is noise in the operation of the fan, whether the noise is too loud, etc. In the operation of the air conditioner, the vibration is slight and the noise is small under normal circumstances, generally below 50db.

If the vibration and noise are excessive, the possible causes are:

Styrofoam plastic pads, etc., can make the vibration of the air conditioner intensify and the noise becomes louder during operation. This is especially true at the beginning of start-up and shutdown.

When the chassis collides, the axis of the fan moves, and the blades lose their balance, which will also make a crashing sound; If there is a foreign object in the fan, the blades will also make a crashing sound when they collide with it.

3. Touch: Touch the relevant parts of the air conditioner with your hands to feel its cold, heat, vibration, etc., which is helpful to judge the nature and location of the fault. Normally, the temperature of the condenser is gradually decreasing from top to bottom, and the temperature in the lower part is slightly higher than the ambient temperature.

If the whole condenser is not hot or the upper part is slightly warm, or although it is hot, there is a significant difference in the temperature of the upper and lower adjacent pipes, it is abnormal. Under normal circumstances, if you put your finger dipped in water on the surface of the evaporator, it will feel cold and sticky. Under normal circumstances, the capillary at the dryer and outlet should have a warm feeling (slightly higher than the ambient temperature, which is basically the same as the temperature of the pipe at the end of the condenser), and if it feels lower than the ambient temperature or there is dew condensation on the surface and the temperature difference between the capillaries and each section of the capillary, it is abnormal.

The suction pipe at 200mm away from the compressor should be about the same temperature as the ambient temperature under normal circumstances.

4. Measurement: In order to accurately judge the nature and location of the fault, it is often necessary to check and measure the performance parameters and status of the air conditioner with instruments and meters. For example, use a leak detector to check whether there is a refrigerant leak; Use a multimeter to measure whether the power supply voltage, the current to the ground at each terminal and the operating current meet the requirements, and the air conditioner controlled by the computer should also measure whether the potential of each control point is normal.

5 Analysis: Most of the results obtained by the above inspection methods can only reflect a certain local state. The various parts of the air conditioner are related to each other and affect each other, and a failure phenomenon may have multiple reasons, and a cause may also produce a variety of failures.

Therefore, it is necessary to conduct a comprehensive comparative analysis of local factors, so as to comprehensively and accurately determine the nature and location of the fault.

——It's not easy to type, it's not easy to upgrade, and it's not easy to see and cherish --

- I hope you will accept the answer and give some motivation and confidence --

——I hope that you will have a new day, all your wishes come true, your work will go smoothly, and your life will be happy and --—

Explain that there is a problem with the circuit drive and temperature control brake, it is recommended to find a professional to overhaul it!

In principle, yes, but you have to find an experienced master to take a look.

If it is not an inverter air conditioner, it can be configured in this way; The electronic control components should be modified appropriately.

Dear Hisense users, hello!

Wisdom and love, quiet and luxury! Please log in,Hisense official**; Hisense Kelon official website**; Call Hisense Kelon Air Conditioner 24-hour service**.

It must be a general-purpose circuit board, or it will not work properly even if it is started.

Oh, the yellow and green wire is the grounding wire, which is directly installed on the shell next to the terminal board of the outdoor unit. The rest of the four-wire terminal blocks.

The two-color wire is the ground wire (protective wire) connected to the machine shell, there should be a screw or nut, and it can be connected to it.

Dear Hisense users, hello!

Wisdom and love, quiet and luxury! Please log in,Hisense official**; Hisense Kelon official website**;

Call 40-06-11-11-11 Hisense Kelon Air Conditioner 24-hour service**.

White, brown, blue, and black are knotted with four green-yellow ground lines, just borrow a piece of land.

What is the external machine wiring pile l used for?

There are four wires from Hisense inverter air conditioner to the outdoor unit,Among them,Live wire,Change,Grounding,24V signal line,Wiring according to the color and text label of the cup note on the terminal。

The line sequence 12345 is numbered on the thread head.

Answer: black connection,Blue connection,Blue connectionn,Brown connectionL,The flower wire is also the ground wire,It's good to connect the iron base,However,This is Hisense's inverter air conditioner,Vacuum is required,Look at the question you ask this question should not be a professional,It is recommended to find a professional to install and debug。

Question: How to wire the Hisense air conditioner with 5 interfaces.

The zero wire is connected to the ground wire, and the color is yellow-green flower wire.

Connect the four-way reversing valve to the external fan motor.

Measure the difference between the inner and outer units. The distance between the inner and outer units should be less than 3 meters, otherwise it will reduce the refrigeration capacity of the air conditioner, increase the load of the compressor, and cause overload protection.

Find the electrical wiring diagram posted on the back of the cover of the electric control box by the air conditioner manufacturer or given in the installation and operation manual, and wire correctly according to the wiring diagram.

If you can't handle it yourself, it is recommended that you find an air-conditioning manufacturer to deal with it after sale.

There are two tube temperature resistors, but there is no need to disassemble the indoor motor!

The lower end of the return air outlet is the indoor temperature, and the elbow at the upper end of the evaporator is the evaporation temperature probe, I don't know which one you are talking about?

According to the guidance of the temperature sensing wire, disassemble the corresponding parts!

Qingdao Quancheng coating veterans are at your service!

1.Disassemble the front frame assembly first.

2.Disassemble the control box.

3.The fan motor has to be taken out, because the tube temperature resistance you are talking about is on the evaporator, and the fan motor has to be removed, and the fan motor has to be hexagon ready.