Friday, April 8, 2011

【School】 split air-conditioning repair weak detection】.


Split air conditioner both refrigeration system or electrical control system than the window type air conditioner is more complex and, therefore, in the analysis and check failure, should be careful and precise. One observation method

Use observation detection camion health, is the repair process to determine a common approach to malfunction. Example: start air conditioner refrigeration Compressor 3 minutes later, the outdoor unit external valve. Hydraulic tube condensation phenomenon appears, run 10 minutes later, the trachea, valve also appear frosting that air conditioner refrigeration operating normally, the refrigeration system with refrigerant.

To start the air conditioner refrigeration compressor, hydraulic valves, hydraulic pipe a began Frost, a few minutes later, cream and melted into the dew, and running in 15 minutes, trachea, dew valve appears, indicating that the air conditioner refrigeration system and a slightly less fluoride, but also basic enough, generally do not need additional refrigerant. To start the air conditioner refrigeration compressor, hydraulic valves, hydraulic pipe appear Frost, about 15 minutes after the trachea, valve also Frost, indicating that the refrigeration system is adequate, refrigerant is indoor units of air filters too dirty, hot swap effect is not good.

To start the air conditioner compressor is running, the start valve. liquid pipe appear Frost, Frost after several minutes, but not in the more-more than ten minutes, and run the pipe, valve has no dew or frost, indicating that the refrigeration system leakage of refrigerant has seriously, you need to conduct supplemental fluoride.

To start the air conditioner compressor running time, still no hydraulic valves, hydraulic pipe appear dew or frost, indicating that the refrigeration system with refrigerant leakage after all, the need for refrigeration system thoroughly serious leak after leak, exclude, and then restart filling refrigerant.

Second test method

Detection of camion is faulty, you can also use the test method to carry out its work in good health or judgement. Specific methods are: use a thermometer to test air conditioner indoor unit and export air temperature difference in air conditioners for cooling operation, when refrigeration compressor start running after 15 minutes, import and export air temperature difference to reach more than 80C (summer temperature in 350C following); winter heating time (outside ambient temperature above the 70C) compressor running in 15 minutes, import and export air temperature to achieve more than 140C, air conditioner refrigeration and heating effect is good. Use the clamp ammeter measuring air conditioner run-time operating current value, current value close to the rated current values, the air conditioner works fine, if measured operating current value is far greater than the rated current values, the air conditioner is bad, in overload status; if measured running current value is far lower than the rated current values on the compressor is in the light condition, the refrigerant in the refrigeration system are more serious leaks. Use gauges to test air conditioner refrigeration system working pressure, refrigeration of indoor units at runtime to run the table pressure at about 0.4MPa ~ 0.5MPa systemheat indoor unit running table pressure if around the 1.5MPa ~ 2.1MPa, are normal. If the pressure deviation from these two too many values, descriptions a/c is not working properly.

In addition, you can split air conditioner refrigeration runtime condensation water excretion, to roughly determine whether normal air conditioners work status. By: when the air conditioner in the strong cold gear running in 15 minutes from outlet pipe mouth if observed have condensation drops out, the air conditioner works correctly, otherwise shows air conditioner does not work correctly.

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