Why is the air conditioner of the excavator not cooling? Analysis of hot topics on the Internet in the past 10 days
Recently, among the hot topics in the field of construction machinery, "the air conditioner of the excavator is not cool" has become the focus of many machine owners and maintenance technicians. As the hot weather continues in summer, the failure rate of excavator air conditioning systems has increased significantly. This article will combine the hot discussion content of the entire network in the past 10 days to provide you with a detailed analysis of the common reasons why the excavator air conditioner is not cool, and provide structured data reference.
1. Analysis of common reasons why the excavator air conditioner is not cool
According to construction machinery maintenance forums and social media discussion data, the main reasons why the excavator air conditioner is not cool can be divided into the following categories:
| Fault type | Proportion | Specific performance |
|---|---|---|
| Insufficient refrigerant | 35% | The air output of the air conditioner is normal but the temperature is too high |
| condenser clogged | 25% | Abnormally high pressure in the air conditioning system |
| Compressor failure | 18% | The air conditioner does not cool at all or cools intermittently |
| Expansion valve failure | 12% | The cooling effect of air conditioners gradually deteriorates |
| other reasons | 10% | Including circuit problems, loose belts, etc. |
2. Detailed diagnosis methods for each fault type
1.Refrigerant low detection
First check the air conditioning system pressure. Normal low pressure should be 2-3bar, and high pressure should be 14-16bar. If the pressure is significantly low, there may be a leak. You can use fluorescent leak detectors or electronic leak detectors to find leaks.
2.Check for condenser blockage
Observe whether there is a large amount of dust, catkins and other debris accumulated on the surface of the condenser. Use a high-pressure air gun to blow from the inside out, taking care not to damage the heat sink. Also check whether the cooling fan is operating properly.
| Check items | normal standard | abnormal behavior |
|---|---|---|
| Condenser surface cleanliness | The heat sink is not clogged | More than 80% of the area is covered |
| fan speed | 2000-2500rpm | Insufficient rotational speed or no rotation at all |
3.Compressor fault diagnosis
Start the engine and turn on the air conditioner, and observe whether the compressor electromagnetic clutch is engaged. If the clutch does not engage, there may be a circuit problem or the compressor is damaged. At the same time, listen to the sound of the compressor running. Abnormal noise often indicates an internal failure.
3. Typical cases that have been hotly discussed by netizens recently
In the past 10 days of online discussions, the following cases have received high attention:
1.The air conditioner of a certain brand of excavator does not cool intermittently.: Many machine owners reported that this problem occurred after one year of use of the new machine. It was finally confirmed to be a quality defect of the expansion valve, and the manufacturer has issued a recall notice.
2.Air conditioner suddenly stopped cooling at all: One case was caused by the breakage of the compressor belt, reminding the user to regularly check the belt tension and wear.
| Case type | Discussion popularity | solution |
|---|---|---|
| Refrigerant leak | high | After repairing the leak, refill the refrigerant |
| circuit failure | middle | Check fuses and relays |
4. Preventive maintenance recommendations
1. Conduct a comprehensive inspection of the air conditioning system before use every year, including a refrigerant pressure test and pipeline leak detection.
2. Clean the condenser surface regularly, especially after working in a dusty environment.
3. When out of service for a long time, start the engine and run the air conditioner for 10-15 minutes every month to prevent the seals from aging.
4. Use original parts for maintenance. Inferior refrigerant and parts will shorten the life of the system.
Summarize:There are many reasons why the excavator air conditioner is not cool, and they need to be systematically investigated. Through the structured data and diagnostic methods provided in this article, we hope to help you quickly locate the problem and take effective measures. If you cannot solve it by yourself, it is recommended to contact professional maintenance personnel in time to avoid small problems turning into major failures.
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