After the air conditioner replaces the press, it is always overheated protection, how to solve it?

After replacing the press of the air conditioner, it is always overheat protection, it should be that the power of the press you replaced does not match the power of the original air conditioner, and you should look for matching parts.

The definition of thermal protection of air conditioning should be: the electronic control system provides the necessary conditions for the press, but a certain protection system of the press disconnects the power supply channel.

Usually the external function works for a period of time, and the pressure or current slowly "climbs" at the moment of the sudden increase in current (protection is disconnected) and the press stops, but the external fan or four-way valve is operating normally!

Some models show a fault right away**, while others don't show up until 4 overcurrents are detected. Each model is different, some are displayed with "characters", while others are represented by a combination of flashing and turning off the "light"! Inverters often have two or three places where faults are indicated.

For example, the internal display board, the inner motherboard, the external motherboard.

The overcurrent of the press mainly includes: short circuit between the turns of the compressor, the voltage is too low, or the three-phase is unbalanced, the wire diameter is too thin, the contact is not good, (including the distribution box, fuse, inferior air opening, conversion plug) handover, the overcurrent protector or the poor contact in that place, and the arc is ignited.

There are many types of press refrigeration oil, I can't figure it out or I don't know how much is missing, don't add it at will! It doesn't matter if it's missing.

The compressor is always hot, open the outer casing and see that the overcurrent protector is smoked by the handover, the hand is very hot, open to see that the contact has been replaced with a "pockmarked face"; And the reason is that the wire diameter is fine, and the contact is poor!

Can you turn on the air conditioner like this without protection?

Four-way valve blow-by.

The outside heat of this air conditioner has been almost blocked by the dirt blown out of the exhaust fan of the cafeteria.

There are also large presses that have been changed to small air conditioners but have not adjusted the supercooling pipe group.

The air conditioning system supercooled pipe group is half-blocked, such as filter scaling, capillary waxing, check valve full plugging or half-blocking, these are very troublesome, simply replace or dispose of the subcooled pipe group.

Filters: This is where thermal protection loves to go wrong.

The main reasons for poor heat dissipation: poor installation conditions; Not conducive to heat dissipation.

The MCU misjudgment caused by the variation of the external temperature sensing probe (or sampling circuit) of the inverter air conditioner forces the fan to low speed, as well as the quality problem of the fan capacitor itself, the external heat transfer is too dirty, (or there is something; For example, oil, dust, carbon scale, leaves, plastic bags, etc. block the back) hot air flow short circuit, and the back is too dirty in winter.

If the air conditioner is always overheated after replacing the compressor, it means that there is a problem with the compressor, and in this case, you can only find the manufacturer.

After replacing the compressor, you measure the current, and when it is operating normally, see if there is any overcurrent? If there is no overcurrent, you can increase the protection current of the thermal protection a little more.

Compressor issues.

On the basis of not replacing the compressor, you can cut off the middle of the capillary tube and make a double capillary tube to solve the problem, which is easier than changing the compressor. The low pressure should not be exceeded, it will not have much effect on refrigeration. It's easy and fast.

: The external machine is not cooled well, the fins are cleaned, and the fan speed is slow. Try replacing the capacitor.

If the air conditioner replaces the compressor, after the compressor, it is always overheated to protect this solution, it may be that the voltage is changed, is it possible that the pressure machine may be matched with the previous one?

Hello, if you want to air conditioner, it is best to call a professional master to help you install it. Because I am not very proficient, it is easy to lead to these problems.

Master the following three ways to solve it easily:

1. Check the pressure loosening valve assembly when the inlet air is unloaded, and clean and eliminate the stuck parts or replace the faulty parts. When unloading the exhaust, check that the unloading valve is blocked or stuck, and the failed parts should be cleaned, repaired or replaced.

2. Check the braking system parts and pipelines. Replace the faulty part.

3. Poor lubrication, too small clearance or cylinder pulling between the piston and the cylinder liner can lead to overheating, and the failed parts should be inspected, repaired or replaced in this case.

The compressor overheated, causing the shutdown soon after starting.

1. If the refrigerant is insufficient or excessive, please fill the leakage and vacuum, add enough refrigerant or release excess refrigerant.

2. Capillary tubes, filters, and expansion valves are blocked.

3. The internal air leakage of the four-way valve, 4. The compressor itself is faulty, such as short circuit, open circuit, hitting the shell to the ground, etc., replace the compressor after inspection and confirmation.

5. If the protection relay itself is faulty, please use a multimeter to check whether the contacts are on when the compressor is not overheated, and replace the new protector if not. When replacing the compressor, check the starting capacitor and the starting relay (if one of them is damaged, both must be replaced).

6. If the high pressure is too high and the pressure relay acts, please analyze the cause and rule it out according to the situation.

7. If the condenser has poor ventilation or short circuit in airflow, please remove the obstacles on the outdoor side and clean the condenser.

The possibilities are roughly as follows:

1. The amount of refrigerated oil in the pipeline of the air-conditioning system is insufficient or partially carbonized

When the amount of refrigeration oil is insufficient or a part of the refrigeration oil undergoes carbonization fission, the amount of refrigerated oil returned to the compressor per unit time during the operation of the compressor is insufficient, resulting in aggravated wear between the internal mechanical parts of the compressor, and the heat generation becomes larger, and overheating protection occurs to a certain extent;

2. The amount of refrigerant in the pipeline of the air-conditioning system is seriously insufficient or too much

The amount of refrigerant is too much to a certain extent, resulting in excessive dilution of the refrigeration oil, reduced lubrication function, and easy to cause liquid compression, and the compressor operating current becomes larger, which is easy to overheat protection; If the amount of refrigerant is too small, the suction temperature of the compressor increases, and the heat of the internal motor cannot be effectively dissipated, and it is easy to overheat protection;

3. Single-phase power supply air conditioning compressor starts to run capacitance aging capacity attenuation

When the starting capacitor of the compressor using a single-phase power supply is aged, the capacity decays and the operating current of the compressor increases sharply, and the heat generation is huge, which is easy to overheat the compressor.

4. Frequent start and stop of the compressor due to air conditioning failure

The air-conditioning compressor starts and stops frequently for a long time, and the refrigeration oil in the compressor is hit into the system pipeline with the refrigerant and cannot effectively return to the compressor with the refrigerant, and the compressor is easy to cause overheating protection due to oil shortage.

An air conditioner is an air conditioner. Refers to the process of adjusting and controlling parameters such as temperature, humidity, cleanliness, speed of ambient air in building structures by artificial means.

Generally, it includes cold source heat source equipment, cold and hot medium transmission and distribution system, terminal device and other major parts and other auxiliary equipment. It mainly includes pumps, fans and piping systems. The terminal device is responsible for using the cold and heat from the transmission and distribution to specifically process the air and temperature to make the air parameters of the target environment meet the requirements.

The first air conditioners and refrigerators used toxic gases such as ammonia and methyl chloride. This type of gas leak can lead to a major accident. Thomas Mikili invented chlorofluorocarbon gas in 1928 and named it Freon.

This refrigerant is much safer for humans, but harmful to the ozone layer of the atmosphere. Freon is a trademark of DuPont CFC, HCFC or HFC-class refrigerants, where the name of each class of refrigerants also includes a number to indicate the molecular composition of its components (e.g., R-11, R-12, R-22, R-134). Among them, R-22 HCFC refrigerant, which is widely used in direct evaporative moderate cooling products, will be discontinued in new production equipment from 2010 and completely discontinued in 2020.

The R-11 and R-12 have been discontinued in the United States. As an alternative, some ozone layer harmless refrigerants have been put into use, including the trade name "PURON" refrigerant and the new environmentally friendly refrigerant R32 are also gradually coming to the market, the R290 molecule contains only carbon and hydrogen, no chlorine and fluorine, and the ozone depletion potential (ODP) is zero.

Air conditioner overheating protection means that the compressor of the outdoor unit stops working due to high temperature, which is a common problem in the use of air conditioners. This kind of failure will lead to poor refrigeration effect or refrigeration failure of the air conditioner, and even damage to the compressor, so if your air conditioner has such a failure, please ask a professional to repair it as soon as possible to avoid more parts damage.

Causes of thermal protection of air conditioners - causes and solutions of thermal protection.

1.Poor heat dissipation due to environmental factors of the outdoor unit. Solution: Reposition the machine.

2.The outdoor unit is oriented incorrectly and is exposed to sunlight for a long time. Solution: Reinstall or add an awning where appropriate.

3.The outdoor condenser is too dusty and dirty. Solution: Clean the condenser with a special air conditioner fin cleaning agent.

4.The heat dissipation of the outdoor unit is poor, the fan is damaged and does not rotate or rotates slowly, and the capacitor capacity of the fan is insufficient or damaged. Solution: Replace the fan and capacitor.

5.The compressor start-up capacitor is faulty or the capacity is insufficient, and the compressor start-up fails. Solution: Replace the compressor starting capacitor.

6.Compressor overheat protection device is damaged. Solution: Replace the compressor overheat protector.

7.Problems with the compressor itself, clogged cylinders, burned coils, etc. Solution: Replace the compressor.

8.Over-temperature protection of the compressor during long-term operation due to too much or insufficient refrigerant. Solution: Check the snow pressure and control it within the normal range.

9.System blockage, ice blockage, dirty blockage, etc. Treatment: Cleaning the refrigeration system, vacuuming, changing the refrigerant.

That means your air conditioner doesn't dissipate heat well. See if the fan of the external unit is spinning fast. Not fast fan capacitance is bad, generally yes. It is to clean the heat dissipation net of the external unit. Thank you Wang.

The built-in protectors of the electrical parts of the air conditioner are mainly the air supply motor and compressor. The compressor is generally built on top and is recoverable. When the temperature is too high, it will be disconnected, and the temperature will be restored after normal.

The main thing to solve this is to see if the fan is rotating, if the fan is rotating, then there is too much dust in the heat sink of the external machine, blocking the air outlet, as long as the dust on the heat sink is cleaned.

Solutions for compressor overheating protection: 1. The heat sink of the outdoor unit is too dirty, and the heat sink is cleaned;

2. When the fan speed drops, rinse the radiator of the outdoor unit with a tap water pipe;

3. The filter screen of the indoor unit is too dirty, clean it in time;

4. If there are too many freons, find a professional maintenance personnel to check the pressure measurement, then vacuum, and then add fluoride after fluoride.

Air conditioner compressor overheating protection solution:

1. Clean the heat sink of the outdoor unit.

2. The indoor unit filter is too dirty, which causes the air conditioning compressor to overheat protection, which can be solved by cleaning the air conditioning filter.

3. There are too many freons in the air conditioner, you can find a special person to measure the pressure, and then vacuum can solve it.

4. The compressor heat dissipation is not good, which causes the compressor to overheat the protection, and the compressor can be dissipated to solve the problem.

The method of judging the quality of the air conditioner compressor.

1. When judging the quality of the air conditioning compressor, it can be distinguished by the three binding posts on the air conditioning compressor, which are S, R, and C, where S represents the starting winding, R represents the running winding, and C represents the common end.

2. Use a multimeter to measure the resistance value of 3 binding posts, if the resistance between SC and RC will add up to the resistance between RS, it is normal data, if the RC resistance is 5 ohms, the SC resistance is in Europe, then the resistance between RS is in Europe.

If the air conditioner compressor is always overheated, it is necessary to check whether there is a problem with the compressor's filtration or heat dissipation.

Clogged dust or dirt on the filter or radiator can cause poor air circulation, affecting heat dissipation, which can overheat the compressor. The solution is to clean the filter and radiator regularly to keep it clear. If there is not enough refrigerant or there is fluorine leakage, it can cause the pressure of the compressor to run unusually high, which can trigger overheating protection.

It is necessary to call in a professional technician to inspect and repair the refrigerant system.

If the air conditioner is used for too long or works in a high-temperature environment, the load on the compressor may be too large, resulting in overheating protection. The solution is to arrange the use time reasonably, avoid continuous operation for a long time, and appropriately reduce the temperature setting in a high-temperature environment.

If there is a fault in the compressor itself, such as a circuit problem, compressor damage, etc., it will also lead to overheating protection. In this case, it is necessary to find professional technicians to carry out overhaul and repair. If none of the above methods can solve the problem, it is recommended to consult a professional air conditioner maintenance personnel, who can check and repair the specific situation and provide a more accurate solution.

Precautions for maintaining air conditioning compressors

1. Regular cleaning: Regularly clean the air conditioning compressor, both external and internal. External cleaning can be done with a soft brush or vacuum cleaner to remove dust and debris to ensure that the heat dissipation of the anti-rolling machine is good.

Interior cleaning needs to be carried out by professional technicians to avoid damage to the compressor and related components.

2. Ensure ventilation: Keep the space around the air-conditioning compressor well ventilated to avoid stacking items or blocking air flow. Good ventilation can improve the heat dissipation effect of the compressor and reduce energy consumption.

3. Avoid overload: Avoid overloading the use of air conditioners, and try to avoid running air conditioners for a long time under extreme temperature or humidity conditions. Too high or too low a temperature can increase the load on the compressor, affecting its life and performance.

4. Regular inspection: Regularly ask professional and technical personnel to inspect the air-conditioning compressor, including pressure, refrigerant leakage, electrical connection, etc. Finding and solving problems in time can avoid greater damage and failures.

5. Avoid vibration and impact: Avoid excessive vibration and impact when using the air conditioner, such as avoiding heavy collisions, do not turn on and off the air conditioner frequently, etc. Excessive vibration and shock can cause damage to the compressor.