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One-way valve failure phenomenon has always been connected and always ends the two forms. Always on will cause the normal cooling, but the compressor running time is too long. Always end the refrigerant will not flow, not cooling. One-way valve of the common faults are blocked, lax closure, leakage and so on. Check valve repair method When the valve inside the nylon body dirty block, no action, or with its integral bypass capillary also appeared dirty block, it will result in poor cooling or heating, or even not cooling or not heat. For this fault, the use of more of the same type of check valve to replace the fault valve, while the refrigeration system must be filled with nitrogen after cleaning, decontamination. When replacing the valve body, care must be taken that the flow of the refrigerant in the one-way valve indicates the upward arrow and the valve body should be cooled to prevent deformation of the nylon valve needle in the valve body, resulting in poor heating effect. For the ball check valve, if you touch the check valve at the moment of shutdown there is a sense of warmth or listening to the air flow sound, then the ball and the inlet seal lax. In this case, alcohol can be cleaned with nitrogen blowing dry method of troubleshooting, once invalid, should replace the new one-way valve. On the new or original system for the one-way valve, the sealing and polarity test method is: vertical one-way valve body (with impact noise), the valve ball falls, the inspiratory flow is the upper mouth End, the other end for the next mouth end. The next breathless barrier is normal, on the contrary is failure, should be replaced. In addition, when the air conditioner heating operation poor heating effect, it does not reach (normal) high pressure under working conditions. However, under the condition of cooling operation, the operation of low pressure and cooling effect are normal, after excluding the other components of the refrigeration system failure, mostly closed one-way valve is not tight. Under the action of high pressure, the refrigerant bleeds through the gap between the nylon valve needle and the valve seat, so that all the refluxed refrigerant does not enter the capillary tube integrated with the one-way valve. In order to ensure the heating effect, it is best to replace the check valve. Check valve is another common problem is the leakage of leakage, such failures are mostly caused by poor manufacturing or maintenance of welding, resulting in leakage of fluorine phenomenon. Missing points appear in the capillary welding, should be re-welding.
August 26, 2024