Q: The air conditioning is quit under what circumstances except me? A: Exit defrost conditions: 1, the defrosting time is longer than 9 minutes. 2, defrost 4 minutes later, the coil temperature is greater than 0 degrees, and within 10 seconds in the coil temperature rises more than twice. 3, defrost for 5 minutes, the coil temperature is greater than or equal to 5 degrees. 4, the current transformer detects excessive current (relative to Guiji). Meet any of the above conditions is automatically exit defrosting state. Entry and exit defrosting process 1, enter defrost, immediately turn off the internal fans, compressors, external fan, 55 seconds to close the four-way valve, 60 seconds to open compressor. 2, exit defrosting. Turn off the compressor, open outside the fan, 55 seconds to open the four-way Q: air conditioning is under what circumstances start defrosting? A: General US Air defrost enter have these types: The first entry conditions: 1, when entering the system heat mode or defrost mode after about 5 minutes, air conditioning repair, according to the maximum difference between the outdoor unit coil temperature and indoor temperature to identify, finds time of 3 minutes. 2, when the above inner coil temperature and indoor temperature difference between 5 degrees and smaller than 3 minutes, 3, ensure that the compressor accumulated operating time more than 45 minutes, 4, the indoor coil temperature is less than 48 degrees, while meeting the four then entered a flower cream. The second condition: compressor total running time over 45 minutes, and run more than 20 minutes of continuous coil temperature is lower than the indoor temperature is 16 degrees 5 minutes into the defrost state. Third various conditions: compressor cumulative operation more than three hours of continuous operation over 20 minutes coil temperature is less than the indoor temperature is 16 degrees 5 minutes into the defrost state. Fourth various conditions: Outside air enters into overload and outside the fan stops, the outer fan next start continuous operation longer than 10 minutes Xuzhou professional air conditioning service, but also to ensure that the compressor total running time over 45 minutes or 20 minutes of continuous revolution indoor coil pipe temperature is less than 48 degrees is entered defrosting state. Fifth various conditions: outside the fan stops and two hours have not yet entered the defrost, the defrost forced entry. Weather turns hot, this air-conditioned and also come in great handy, however, air conditioning need to be careful of freon. They have been blown to pieces of the air conditioning unit, as well as the maintenance man was badly burned, while the cause of the accident cause is caused by too much because the Freon added pressure, the air conditioning compressor explosion. Sheng Erda air conditioning maintenance: "The new Freon called '410A', so if you want to add refrigerant if air conditioning Xuzhou Hitachi central air conditioning sales, must be evacuated, if not evacuated, the air conditioning is great damage, easily blew . "Insiders told reporters that, under normal circumstances, a qualified installation of air conditioning, in 3-5 years do not need to add freon Xuzhou central air conditioning repair, unless there is a refrigerant during use or transfer machine run drain phenomenon. But the real need for air conditioning freon people, Do not attempt to dismantle or add their own air conditioning, air conditioning manufacturers should try to choose the informal service sector and the designated qualified maintenance workers. Sheng Erda air conditioning maintenance: "We must be reminded that the refrigerant is not a plus, the better, but more so, it (cooling) effect is get out and normal, such as one of the (air conditioning) plus 6 pressure Freon enough. ", air-conditioning maintenance, refrigeration Sheng Erda, Xuzhou professional air conditioning maintenance provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou 圣尔达 Refrigeration Electrical Services Limited (xzktw.com) strong, credible, Xuzhou in Jiangsu Province of heat, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Sheng Erda refrigeration into the brilliant and you work for a better future!