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              空調效果差維修

              家電維修  03-23 23:06  567  0
              家電維修

                檢修日期:2022年3月23日

                    品牌型號:美的空調KFR-72LW/BP2DY-E

                故障現象:空調制熱效果差,出風溫熱

                故障部位:制冷系統、電控系統、缺氟等

                維修思路:

                1、到用戶家先觀看空調外機有無遮擋造成外機吸熱不好,開機試機,觀看空調運轉情況,仔細觀察空調前10分鐘左右運轉正常,運轉頻率可以達到高頻,出風溫度大約50度(高頻時電壓220v,電流在額定范圍內,基本可以排除是制冷系統和缺氟造成),高頻維持3分鐘左右就開始降頻,出風溫度就變得溫熱了。這時測量供電220V正常,排除電壓限頻,由于室內溫度較低,大約2度左右,設置溫度30度不應該出現限頻。

                2、打開外機,接上美的變頻檢測儀,小板也不顯示故障代碼,這時分別觀察各項數據是否正常,當觀察到T2(室內管溫)溫度58度時,發現溫度偏高,因為這時吹出的風是溫風斷定T2傳感器及相關電路有問題。

                3、打開內機電控盒,去下T2傳感器,測量阻值偏小,正常值25度對應阻值10K。

                維修方法:更換傳感器試機正常。

              英文版:

              Date of overhaul: March 23 2022

              Model Number: Air Conditioner KFR-72LW/BP2DY-E

              Failure Phenomenon: Poor heating effect of air conditioner warm air outlet

              Trouble spots: refrigeration system electric control system fluoride deficiency etc.

              Maintenance thoughts:

              (1) Go to the user's home to see whether the air conditioner's heat absorption is not good due to shielding start the test machine watch the operation of the air conditioner carefully observe the normal operation of the air conditioner about 10 minutes before the operation of the air conditioner the operation frequency can reach high frequency the wind temperature is about 50 degrees (high frequency voltage 220 V the current is within the rated range basically can be excluded from the refrigeration system and fluorine deficiency) the high frequency for about 3 minutes began to fall the wind temperature will become warm. At this time the measurement of power supply 220V normal excluding the voltage frequency limit because the indoor temperature is low about 2 degrees set temperature 30 degrees should not appear frequency limit.

              2、 Turn on the external machine and connect with the frequency conversion tester of the United States and the small board does not show the fault code. Observe whether each data is normal at this time. When observing the temperature of T2 (indoor pipe temperature) at 58 degrees it is found that the temperature is on the high side because the wind blowing out is a problem with the temperature wind to determine the T2 sensor and relevant circuits.

              3、 Open the electronic control box of the internal machine and go to the T2 sensor the measured resistance value is relatively small and the normal value of 25 degrees corresponds to the resistance value of 10K.

              Maintenance method: replace sensor test machine normal.




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