What are the fault phenomena of air conditioning system when there is air?

1. The needle of the compressor exhaust pressure gauge swings.

When there is air in the refrigeration system, the pointer swings slightly larger and swings slower.

2. The condensation pressure is very high. When the air is mixed into the refrigeration system, the exhaust pressure and exhaust temperature are both greater than the normal value, and the suction pressure is also higher than the normal value.

3. The refrigeration effect is very poor. After the air is mixed into the refrigeration system, due to the cooling capacity.

drop, so that the temperature of the cold air sent out can not be lowered.

A method for determining the presence of air in the system pipes.

After stopping for 2 hours, connect the high pressure or low pressure pressure, compare the pressure data with the "R22 Thermal Properties Table", find out the corresponding temperature, and compare the temperature with the on-site ambient temperature.

It is also possible to find the corresponding pressure in the "Thermal Properties Table of R22" according to the ambient temperature at that time after stopping for 2 hours and compare it with the measured pressure of the air conditioner, and the difference between the measured pressure and the corresponding pressure at the ambient temperature at that time is the non-condensable gas pressure. This is the most scientific method for detecting non-condensable gases.

1) Phenomenon. 1) Both high and low pressure are high.

2) The low-pressure pipeline is not cold enough.

3) The air outlet is not cold enough.

2) Cause, air enters the system.

3) Processing. 1) Replace the liquid storage dryer.

2) Replenish the compressor oil.

3) Repair the pipeline, and re-vacuum and recharge the refrigerant.

1. The needle of the compressor exhaust pressure gauge swings.

When there is air in the refrigeration system, the pointer swings slightly larger and swings slower.

2. The condensation pressure is very high. After the air is mixed into the refrigeration system, the exhaust pressure and exhaust temperature are greater than the normal value of the main object, and the suction pressure is also higher than the normal value.

3. The refrigeration effect is very poor. After the air is mixed into the refrigeration system, the temperature of the cold air sent out cannot be lowered due to the decrease in cooling capacity.

A method for determining the presence of air in the system pipes.

After stopping for 2 hours, connect the high pressure or low pressure pressure, compare the pressure data with the hail of "R22 Thermal Properties Table", find out the corresponding temperature, compare the temperature with the on-site ambient temperature, if it will be higher, the higher part indicates that there is non-condensable gas in the system, the more high, the more non-condensable gas exists.

It is also possible to find out the corresponding pressure in the "R22 Thermal Properties Table" according to the ambient temperature at that time after stopping the 2 small hoods and compare them with the measured pressure of the air conditioner, and the difference between the measured pressure and the corresponding pressure at the ambient temperature at that time is the non-condensable gas pressure. This is the most scientific method for detecting non-condensable gases.

Some air conditioners need to exhaust air, some are not cleaned at the beginning of the vacuum, and some are the air in the refrigeration system, which will affect the condensation pressure and efficiency of the air conditioner, and will affect the compressor, so the air needs to be removed. We can try the following methods at home, or we can find a professional heating treatment.

The air is exhausted using the refrigerant in the air conditioner. First of all, we can unscrew the fluorine injection nut and back cover nut at the high and low pressure valve, and then open the high and low pressure valve core, and close it after about 10 seconds.

Freon is added to expel the air. We need a separate refrigerant tank with the fluoridation nozzle of the low-pressure valve connected to the piping of the separate refrigerant tank. After the connection is completed, we can slightly loosen the connection nut on the high-pressure valve and the Huiloud refrigerant tank.

valve, inject refrigerant, close the valve after about 2 3 seconds, wait about 10 15 seconds, tighten the connection nut.

The vacuum pump discharges the air. Unscrew the valve fluorine nozzle nut first, and then connect with the vacuum hose. Turn the "LO" knob counterclockwise and turn it on, then turn on the switch of the vacuum pump, and then vacuum.

After some time has passed, you can stop vacuuming. Finally, we need to unscrew the back nut of the valve and use a wrench to screw the valve spool in a counterclockwise direction all the way so that the refrigeration system is fully open.

There is a phenomenon of air in the air conditioning system.

The needle of the compressor exhaust crack gas pressure gauge swings. When there is air in the refrigeration system, the pointer swings slightly more and swings slowly.

The condensing pressure is very high. When the air is mixed into the refrigeration system, the exhaust pressure and exhaust temperature are higher than normal, and the suction pressure is also higher than normal.

The cooling effect is poor. When the air is mixed into the refrigeration system, the temperature of the cold air sent out cannot be reduced due to the decrease in cooling capacity.

Why does the air conditioner get into the air.

In the process of processing or installation, the air conditioning system is welded with copper pipes, which may cause false welding and water leakage due to human error. Before the air conditioning system is fluoridated, it is first evacuated. But if there is a leak in the pipe, the vacuum will not be pumped clean.

Or the system is very large, and the vacuum gauge is not connected when vacuuming, purely relying on experience. Then there is a high probability that there is air left in the system at this point.

Air is a non-condensable gas. The state of the refrigerant in the air conditioning system changes during the cycle, such as the gas in the condenser becomes liquid, and the liquid in the evaporator becomes gas. But air is not, it is always present in the condenser or accumulator in the form of a gas.

As a result, there is a possibility of an increase in the head head, an increase in motor current, and an increase in compressor wear.

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Hello, Lead or shed will be happy to answer for you. There will be (1) phenomenon when there is air in the air conditioning system: 1) high and low pressure are high. 2) The low-pressure pipeline is not cold enough.

3) The air outlet is not cold enough. (2) The reason is that the air in the system has entered the group. (3) Treatment: 1) Replace the liquid storage dryer.

2) Replenish the compressor oil. 3) Repair the pipeline, and re-vacuum and recharge the refrigerant.

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Let me answer this question for you: 1. The needle of the compressor exhaust pressure gauge has oscillated. When there is air in the refrigeration system, the pointer swings slightly larger and swings slower. 2. The condensation pressure is very high.

After the air is mixed into the refrigeration system, the exhaust pressure and exhaust temperature are higher than the normal value, and the suction pressure is also higher than the normal value. 3. The refrigeration effect is very poor. After the air is mixed into the refrigeration system, due to the decrease in refrigeration capacity, the temperature of the cold air sent out cannot be reduced.

1.The air conditioner is not cooling or heating is insufficient: it could be due to insufficient refrigerant, faulty compressor, clogged condenser or evaporator, etc.

2.Air conditioner leakage: It may be due to blocked drain pipes, leakage of indoor or outdoor units, broken pipes, etc.

3.The air conditioner is noisy: It may be due to the failure of the fan or compressor, the unstable installation of the indoor unit or outdoor unit, etc.

4.Air conditioner circuit failure: It may be due to power line failure, control board failure, sensor failure, etc.

5.Insufficient air volume of the air conditioner: It may be due to the failure of the fan, the blockage of the filter of the over-paiqin, etc.

6.Poor cooling effect of air conditioner: It may be due to the excessive temperature difference between indoor and outdoor, poor heat dissipation of indoor or outdoor units, etc.

7.Failure of the remote control of the air conditioner: It may be due to the battery of the remote control of the hand bus, the remote control is malfunctioning, etc. Dusty potatoes.

20 common faults of air conditioners.

1. The air conditioner only blows the air and does not refrigerate. Scope of failure: the outdoor unit does not work; lack of fluoride in air conditioners; Damage to the pressure peiyu shrinking machine; The starter capacitor of the press-fitting section shrinking machine is damaged.

2. The air conditioner does not turn on.

3. The air conditioner does not start.

4. The outdoor fan of the air conditioner does not work.

5. The compressor of the god-worshipping machine outside the air conditioner does not start.

6. The air conditioner is not cold enough.

7. The air conditioner can be turned on manually and the remote control can not be turned on.

8. The remote control of the air conditioner can be turned on manually, but it cannot be turned on manually.

20 common faults of air conditioners: 1. The air conditioner only blows and resists wind and does not refrigerate. Scope of failure: the outdoor unit does not work; lack of fluoride in air conditioners; Compressor damage; The compressor starter capacitor is damaged.

2. The air conditioner is constantly turned on in spring. 3. The air conditioner does not start. 4. The outdoor fan of the air conditioner does not work.

5. The compressor of the air conditioner does not start. 6. The air conditioner is not cold enough. 7. The air conditioner can be turned on manually and the remote control can not be turned on.

8. The remote control of the air conditioner can be turned on, and the machine cannot be turned on manually.

Hello, 1. Compressor high pressure protection. Failure analysis: First of all, it is necessary to determine whether the failure occurs immediately after start-up** or the failure occurs after a period of operation**.

1) If there is a fault when it is turned on**, first turn on the internal machine, unplug the plug button on the OVC, and connect the OVC with the ground wire with another wire. (2) If the ** display does not appear, check whether the connection from OVC to the high-voltage switch is in good contact! If the contact is good, check whether the high-voltage switch itself is on (within normal pressure, the switch is on), if it is not on, the high-voltage switch is damaged, the high-voltage switch needs to be replaced, and the machine is re-pulled vacuum plus refrigerant to debug the United States 2, machine low pressure protection. Failure Analysis:

1) Focus on checking whether the refrigerant is missing and whether the pressure switch is damaged. First of all, when maintenance, you can judge the working pressure with a pressure gauge, if the pressure is low, it means that there is less refrigerant, and additional refrigerant is needed; If the pressure is normal, it can be judged that the pressure switch is damaged, and the pressure switch needs to be replaced and re-debugged. Household air conditioner fault maintenance ideas (2) may also be the internal and external machine radiators, filters are too dirty.

This maintenance is very simple, only need to open the cover plate of the inner machine to judge, the outer machine only need to see whether the condensation fin is dirty and blocked, if it is clean. (3) There is also a possibility that the circuit board related circuits may be damaged. When the above situations are judged to be over and confirmed that there is no problem, the basic problem appears on the circuit board, and the corresponding model of circuit board needs to be replaced.

3. The air conditioner shows E4. Fault meaning: Thermal fuse disconnection protection or communication failure between the main control and display.

Failure analysis: (1) The refrigerant leakage leads to poor cooling of the unit. During maintenance, the side pressure is found, the leakage point is found, the leak is repaired, and the refrigerant is added and re-commissioned.

2) The connector is loose or there is a problem with the wiring. First of all, check whether the plug-in is loose, and if there is a re-plug uplink; The wiring should be carefully checked, especially the location of the wiring or the position of the wall and metal objects, and the loose or worn places should be repaired in time. (3) The computer board is broken.

This requires a replacement of the computer board. 4. Midea E5. Failure Analysis:

1) The fixed-frequency hang-up shows that E5 is a T1 sensor fault, and only the corresponding specification of the sensor needs to be replaced. (2) If it is a fixed speed cabinet machine, it means that the communication failure between the indoor motherboard and the display board or the network communication failure. The main thing is to check the line first, if the line is normal, it means that there is a problem with the main board of the indoor unit, and you can replace it.

The above is the fault you sorted out** and maintenance ideas, some may not be too detailed or there is a leak, I hope you can understand, if there is a shortcoming, I hope you leave a message to say, if you like it, you can like it, as for other failures**, next time I will talk to you one by one. Thank you.