Power minutes or tens of minutes outside the machine automatically shut down time: Boot minutes or tens of minutes outside the machine automatically shut down, or outside the machine does not start changing the indoor pipe temperature sensor There is a plug-in to display fault after fault codes and run the code is not the same as Xuzhou brand central air conditioning prices, Unplugged show the power or signal lines generally, motherboard problem. Running for some time displays general sensor problem. Air conditioning is not cooling after power is not heating, the crude pipe frosting quickly Symptom: boot does not cooling after heating, thick tube quickly frost, shut down central air conditioning, measured as 8Kg (due misjudgments pay more Freon), power After rapid pressure drop to zero. Analysis: The boot lid inspection, found a four-way solenoid valve screw off, resulting in a four-way valve is not in place in Xuzhou used central air conditioning recovery, with high and low voltage string gas. Treatment: screwed to the four-way valve coil, that is to recover part of freon pressure is normal, the boot is working properly. How often required use of air conditioning and fluoride? When do I need to air conditioning and fluoride is not a limit for the time, and some air conditioning needs one to two years plus a fluorine, and there are a lot of friends will mistakenly believe that the summer air conditioning is not cooling is lack of fluoride , this is actually wrong, when air-conditioning use, clearly felt that the cooling and heating effect is not good, there may be insufficient F Lee Pleiades, require fluoride Xuzhou central air conditioning, cleaning and maintenance, but it is not a bad cooling and heating effect will certainly need fluoride can be resolved, and perhaps for other reasons. 1: The outdoor unit may be dirty, thick dust, impact outside the machine cooling effect caused by bad, we often encounter such a situation in which the actual repair. 2: It may be badly clogged filter inside the machine, causing the machine can not evaporate Merry normal cycle, but there is no cold wind blowing. 3: It may be an internal air conditioning system blockage, caused by poor circulation, resulting in air conditioning cooling and heating effect is not good. Under normal circumstances, be able to exclude the above three cases, that it is necessary to fluoride air conditioning, and in order to work properly. Xuzhou professional central air-conditioning maintenance of telephone _ Sheng Erda cooling (certified) _ central air conditioning is provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou Sheng Erda Refrigeration Electrical Services Limited (xzktw.com) is in Xuzhou, Jiangsu, heat, refrigeration and air conditioning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In Sheng Erda refrigeration leadership with the staff warmly welcome all inquiries negotiations to create a better future for refrigeration Sheng Erda.