Suzhou Midea air conditioner repair service phone number-24-hour after-sales repair center

Midea’s air conditioning repair service center insists on operating with quality and integrity and is recognized by the majority of users. All employees of the company have received professional skills training, rich experience, and strong skills. The center has accumulated rich maintenance data and experience over the years, and can quickly and accurately solve all faults encountered by users.

Midea air conditioner nationwide 24-hour service hotline:

After-sales service process:

Customers report faults for repair—gt; the company registers, accepts and dispatches work—gt; Contact the customer to visit - gt; come to inspect the fault and quote - gt; accept the quotation for repair - gt; complete the repair and fill in the warranty form to confirm the signature of the user - gt; the company pays a return visit to the customer - gt; the customer confirms the repair results - gt ; Entering the warranty period!

Service items:

1: Air-conditioning maintenance: Professional air-conditioning technicians repair various brands of air-conditioning, and the air-conditioning maintenance warranty is half a year.

2: Air conditioner relocation: Professionals will move the air conditioner door-to-door. Air conditioner moving auxiliary materials, indoor unit cleaning. Ensure that the refrigeration and heating machines are moved consistently.

3: Air conditioning installation: Professional installers install (disassemble) air conditioners of various brands, with free design and commissioning, free installation auxiliary materials, and one-year warranty.

4: Air conditioner fluoride: professional air conditioner fluoride of various brands, air conditioner fluoride, one-year warranty.

5: Air conditioning cleaning and maintenance: Air conditioning cleaning will reduce the power load of the air conditioner, reduce the operating costs and maintenance costs of the air conditioner, and extend the service life of the air conditioner. Professionals will come to your door with special cleaning agents for air conditioners to serve you.

Service area: There are maintenance service outlets in the urban area and surrounding towns (districts, etc.), and technicians can be arranged for door-to-door maintenance nearby.

Service process:

1. After the master comes to inspect, he will inform you of the fault and the parts that need to be replaced/repaired based on the actual situation.

2. If the parts that need to be replaced are not listed in the charging standards, you can negotiate the price with the master before repairing;

3. If the master comes to inspect, If the user gives up the repair, he only needs to pay the on-site inspection fee of 3,050 yuan;

4. When the operation is too difficult and the master cannot repair, the service can be canceled and the user will be refunded the entire order amount.

Service guarantee:

1. Clearly marked price: any charges that may occur during the service will be charged according to the charging standards;

2. Warranty repair: service Within 180 days after completion, if there is an abnormality in the repaired part or a fault of the same nature occurs in the repaired electrical appliance, you can contact the merchant for free repair. Animal damage, power supply problems, liquid intrusion, human factors, unauthorized disassembly, etc. are not covered by the warranty.

Explanation of fees:

1. If the master cancels the service due to customer reasons after visiting the home, a door-to-door running fee of 30 yuan will be charged, which is the gas cost of the master. I hope you can understand .

2. The item price appearing in this post is not the basis for charging, nor is it the actual transaction price. The actual transaction price shall be based on the unified charging standard presented by the master.

3. If the repair cannot be completed due to our factors such as excessive difficulty in repair or lack of accessories, etc., the advance payment will be refunded in full without any fees.

4. Contact the engineer privately for service. Any issues (property safety, personal safety, etc.) have nothing to do with the company;

5. Except for this use, the company strictly prohibits engineers from Additional fees will be charged privately. If this occurs, please call *customer service hotline directly to make a complaint

6. Failures caused by installation are guaranteed for 30 days, and failures caused by maintenance are guaranteed for 90 days. If the same occurs during the warranty period Faults will be repaired free of charge and a formal warranty card will be provided

Since its establishment, our company has been constantly summarizing experience, improving ourselves, and is committed to the business philosophy of pragmatism, innovation and development. The company adheres to the business principles of surviving by reputation and developing by service quality, and has been well received by customers from all walks of life.

The company provides customers with the installation and maintenance of various imported and domestic brands of air conditioners, as well as the supply of various imported and domestic brands of air conditioners. Because we are professional and dedicated, we can trust and rest assured

Quality is our life. York After-sales Repair Service Center will continue to grasp the lifeline of the development of science and technology, continue to uphold the concept of high-quality and timely professional services, based on integrity and continuous innovation Our maintenance technology and increasingly higher service standards provide our customers with better services!

Air conditioners are increasingly entering people’s homes. Not only are air conditioners available in every house in the city, but also in Rural areas are basically covered, and the use of air conditioners is really becoming more and more widespread. But after using it for a long time, some glitches will appear more or less. I don’t know how everyone solves them. In fact, everyone still needs to know how to maintain their air conditioners when using them. Good maintenance methods will extend the life of your air conditioner.

Common faults of Midea air conditioners

There are five substances in the circulation of the refrigeration system: refrigerant, oil, water, air and other impurities. The first two are necessary to ensure the normal operation of the system. Yes, the latter three substances are harmful to the system, but they cannot be absolutely eliminated. At the same time, the refrigerant itself has three states: vapor phase, liquid phase, and vapor-liquid mixed phase. Therefore, once the air conditioning and refrigeration system fails, its symptoms and causes are relatively complicated. Below, eleven common faults of air conditioning and refrigeration systems are listed.

1. Picture of the fan not rotating

There are two reasons for the fan not rotating: one is electrical failure and the control circuit is not connected; the other is mechanical failure of the fan shaft.

When the room air conditioner fan does not rotate, the temperature of the air-conditioned room will rise, and the suction pressure and discharge pressure of the compressor will decrease to a certain extent. When the air conditioning fan stops rotating, the heat exchange efficiency of the heat exchange coil in the air conditioning room decreases. When the heat load of the air conditioning room remains unchanged, the temperature of the air conditioning room will rise.

Due to insufficient heat exchange, the temperature of the refrigerant in the heat exchange coil will decrease relative to the original temperature, that is, the evaporation temperature will become smaller, and the cooling coefficient of the system will decrease. The evaporator outlet temperature sensed by the thermal expansion valve also decreases, resulting in a smaller opening of the thermal expansion valve and a corresponding decrease in refrigerant, so the suction and exhaust pressures both decrease. The overall effect of the reduction in refrigerant flow and cooling coefficient is to reduce the cooling capacity of the system.

2. Picture of cooling water inlet temperature being too low

As the cooling water temperature decreases, the compressor exhaust pressure, exhaust temperature, and filter outlet temperature all decrease. . The air-conditioned room temperature remains unchanged because the cooling water temperature has not dropped to a level that will affect the cooling effect. If the cooling water temperature drops to a certain level, the condensation pressure will also decrease, causing the pressure difference on both sides of the thermal expansion valve to decrease, the flow capacity of the thermal expansion valve will also decrease, and the refrigerant will also decrease, so the refrigeration effect will decrease. .

3. Picture of the cooling water inlet temperature being too high

If the cooling water inlet temperature is too high, the refrigerant will be supercooled, the condensation temperature will be too high, the condensation pressure will be too high, and the compression The pressure ratio of the machine increases, the shaft power increases, and the gas transmission coefficient decreases, thus reducing the cooling capacity of the system. Therefore, the overall cooling effect will be reduced and the temperature of the air-conditioned room will rise.

4. Picture of the circulating water pump not turning

When debugging and operating the refrigeration unit, the system circulating water pump should be turned on first. When the circulating water pump does not rotate, the cooling water outlet temperature and the condenser refrigerant outlet temperature rise most obviously. Due to the sharp decline in the cooling effect of the condenser, the suction temperature and exhaust temperature of the compressor also rise rapidly, and the condensation temperature The rise causes the evaporation temperature to also rise, but the rise in evaporation temperature is not as large as the rise in condensation temperature, so the cooling efficiency is reduced and the temperature of the air-conditioned room rises rapidly.

5. Picture of clogged filter

A clogged filter means the system is dirty and clogged. Under normal circumstances, dirty blockage often occurs at the filter. This is because the filter screen blocks the channel section and filters out dirt, metal shavings and other debris. Over time, the refrigeration and air conditioner will be blocked.

The consequence of filter clogging is a reduction in refrigerant circulation. Many of the reasons are similar to the expansion valve opening being too small, such as the compressor suction and exhaust temperature rising, the compressor suction and exhaust pressure dropping, and the air conditioner The room temperature rises, the difference is that the filter outlet temperature is getting lower and lower. This is because throttling begins at the filter, causing the local temperature of the system to drop. In severe cases, local frost or ice may form in the system.

6. Picture of excessive load in the air-conditioned room

Due to the effects of internal and external disturbances in the room and the influence of various factors, excessive load in the air-conditioned room will cause the temperature of the air-conditioned room to rise. Finally, the temperature index that should be maintained in a normal air-conditioned room cannot be reached. At the same time, the two most affected parameters are the compressor suction temperature and discharge temperature.

Due to the influence of the heat capacity of the air-conditioned room, the impact on other parameters will not become obvious until a certain period of time has passed.

7. Picture of cooling water flow rate being too small

Due to the relationship between cooling water pipes and cooling water valves, as well as the configuration of the cooling tower in the system being too small or too much scale in the cooling tower, cooling Too small water flow and too high cooling water inlet temperature are also common faults.

When the cooling water flow rate is too small, the heat exchange effect of the condenser decreases, so the refrigerant temperature at the condenser outlet increases, and the refrigerant condensation temperature increases, which reduces the refrigeration coefficient and affects the refrigeration effect.

With other conditions remaining unchanged, the temperature of the air-conditioned room will also rise to a certain extent, and the suction temperature of the compressor will also rise. But the most obvious change is that the cooling water outlet temperature difference will become larger and larger.

8. Picture of the expansion valve opening being too small

The expansion valve opening is too small in terms of the normal refrigerant charge in the refrigeration system. The expansion valve opening is too small. During the fault, the circulating refrigerant in the entire system is insufficient. When other working conditions remain unchanged, the liquid formulation cannot fully meet the vaporization and heat absorption under low pressure. Therefore, the return air superheat is very large, and the suction and exhaust temperature is different from that of the air conditioner. As the room temperature rises, the suction and exhaust pressure will drop.

The temperature of the refrigerant at the condenser outlet will decrease (that is, the cooling capacity of the system is increased), because the heat exchange capacity of the condenser does not change, but the refrigerant flow rate circulating in the entire system is very small. At this time, the cooling coefficient increases and the unit cooling capacity increases. But the total cooling capacity is reduced, so the air-conditioned room temperature will rise.

There is a small opening in the expansion valve (the yellow arrow). To adjust the opening of the expansion valve is to adjust the size of the small opening. The larger the opening and the larger the diameter, the more liquid will flow through.

9. Picture of insufficient refrigerant

Insufficient refrigerant is usually caused by two reasons: first, the product is not charged enough before leaving the factory, which generally occurs rarely; second, the unit is perennially During operation, too little refrigerant is caused by leakage in system valves or welded parts, so it is a common fault. There is no obvious difference between the two causes of failure: insufficient refrigerant and too small an opening of the expansion valve.

10. Picture of excessive refrigerant

Excessive refrigerant is caused by blind refrigerant charging, which is not uncommon during refrigeration system maintenance. This will reduce the effective heat exchange area in the condenser, reduce the heat exchange effect, cause the condensation temperature to rise, the condensation pressure to increase, and the high pressure to be too high.

Excessive refrigerant entering the evaporator fails to fully vaporize and is sucked into the compressor, causing high low pressure, condensation or frost on the compressor cylinder head, and in severe cases, liquid shock and cylinder accidents. Part of the liquid refrigerant enters the compressor, which increases the load on the motor, making it difficult to start. The current is overloaded during operation. In severe cases, the motor may be burned due to overload.

11. Pictures of damaged compressor suction and exhaust valve plates

For reciprocating compressors, damaged compressor suction and exhaust valve plates are a common mechanical failure. This experiment It is simulated by bypassing the suction and exhaust ports of the compressor. When a fault occurs, the suction temperature and suction pressure will increase, and the exhaust temperature and exhaust pressure will decrease. This is equivalent to a reduction in the actual air delivery volume of the compressor, so the cooling effect will be poor, and the air-conditioned room temperature will be very high. If it rises quickly and the situation is serious, the low-voltage relay will shut down the compressor.

Air conditioners are full of germs! Many families have begun to use air conditioners. However, if the air conditioners are not cleaned for a long time or are not cleaned thoroughly, the germs hidden in the radiators, wind wheels and other components will be blown out by the air conditioner wind, causing various "air conditioning diseases" and threatening people's health. . Before use, most people will pay attention to cleaning the dusty filter. However, a recent survey by the School of Public Health and Hygiene of Fudan University in Shanghai showed that the heat sink behind the household air conditioner filter is the largest source of bacterial contamination, with the highest number of bacteria detected reaching 91,259/cm2, of which mold exceeded the standard. The rate is as high as 84%. Common air conditioning germs in air conditioners: Bacillus cereus, Staphylococcus aureus, mold, Legionella and other germs

2. Low energy efficiency: The price paid for low energy efficiency: According to estimates: one After using an air conditioner with an input power of 2 kilowatts for two years, if the dirt thickness reaches 0.25mm, it can save about 28 yuan in electricity bills after cleaning. If it is used for 8 hours a day and 5 months a year, the electricity bill is assumed to be 0.65 yuan/kWh. The average household has 3 air conditioners. If the air conditioner is not cleaned regularly, the electricity bill wasted in your home per year is 2×8×30×5×0.65×0.28×3=1310.4 yuan.

3. Short lifespan: Under normal circumstances, the service life of air conditioners generally given by manufacturers is about 10 years. But in fact, because "people don't clean air conditioners for a long time", "the method of cleaning air conditioners is incorrect", or "effective cleaning reagents are not used", air conditioners often work sick, shortening the service life of ordinary household air conditioners. Only 7 years left!

Don’t buy a bottle of cleaning agent and spray it yourself in summer!

1. Only the part of the fins that can be seen when opening the cover is sprayed, and nearly half of the fins are not sprayed;

2. The air outlet where germs are concentrated The wind wheel cannot be cleaned, and the smell of the air conditioner is mainly because it is not clean;

Cleaning effect display

(Condensate water detection) Escherichia coli: Killing rate gt; 99.99

Legionella pneumophila: killing rate gt; 99.99

Staphylococcus aureus: killing rate gt; 99.99

Candida albicans: killing The destruction rate is gt; 96.23

Our company has strong technical force, complete organization, and has a technical maintenance and installation team with many years of practical experience. All staff have at least 6 years of working experience in this industry. There are also professional and technical personnel who have been engaged in sales, installation and other pre-sales and after-sales services for a long time. Maintenance personnel have received training in professional courses and are familiar with the performance, maintenance and management of various equipment. They have excellent professional skills and service awareness, ensuring the quality of each service and winning the recognition and trust of our customers.

The masters who come to your door have more than ten years of professional experience, with excellent skills and enthusiastic service. First test, quote, and then start repairs after the customer agrees. Don’t repair if there is no safety guarantee, don’t repair if the root cause is not cured, don’t repair if there is no repair value; don’t waste a penny from the customer. The repair will be considered complete only after the user has accepted it, and a bill and warranty card will be issued. After the repair, make a return visit to inquire about the usage of the appliances and charging details.