Air conditioning is not cooling after power is not heating, the crude pipe frosting quickly Symptom: boot not cooling not heating, crude pipe frost soon after shutdown, measured after 8Kg (due misjudgments pay more Freon), power is, Pressure drop rapidly 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, the emergence of high and low 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. Changhong KFR-25GW / H air conditioning on power no reaction (1) to observe indoor light does not work, use a multimeter to check the power outlet has 220V Xuzhou air conditioning maintenance and fluoride, power supply is normal. (2) Remove the indoor unit casing, fuse Check the indoor unit on the PCB, and found the fuse has blown. In this case the insurance can not be immediately replaced with new reasons should be identified in order to be replaced. (3) further measurements with a multimeter ohm power transformer primary resistance, measured as 0Ω, blown fuse caused due to a short circuit. (4) carefully observe the transformer did not find traces of burnt, so suspect varistor damage, remove the varistors with a multimeter ohm measurement, cue really short-circuited. (5) Insurance tube put on the same model with the same parameters of varistors, the air conditioner is working properly. If not the same type varistor on hand, emergency method is temporarily not Varistor power test machine. Household air conditioners have the advantage of independence, the economy. The main advantages: 1. Temperature control: Ordinary household air conditioner can adjust the air temperature, but due to structural limitations, the small air volume, air temperature and the temperature difference between the indoor air, so that the indoor temperature distribution is not uniform, poor comfort; and large central air-conditioned, the temperature difference is small, the temperature distribution, the comfort is good. And air conditioning of the kitchen can be achieved. 2, adjust the humidity: household air-conditioners are dehumidifiers, run over time, indoor air dry, skin discomfort. The Beijing area dry climate, central air can be pumped into the fresh air add humidity. 3, the suspension is filtered: dust suspended in the air is one sign of bad air, central air-conditioning system with supply and return air system, a large number of cold (warm) air blown from the outlet, turn each bedroom and living room The air is sucked back from the return air, return air built with high-efficiency filters, can filter dust. 4, increase fresh air: each person needs 15-18 cubic meters of fresh air per hour, in order to ensure health. Now widely used in household air-conditioner only air temperature regulator, and to improve the air humidity, oxygen content and other indicators of powerlessness. With the increase of the air conditioner running time of Xuzhou conditioning repair recovery, indoor air gradually becomes cloudy, easily lead to upper respiratory infections. Filtration and purification of the above relying solely on measures of negative ions and so it is difficult to fundamental change. The most effective way to solve the problem is to replace the fresh air. Home central air conditioning with fresh air replenishing device can be introduced into new wind. 5, increase the aesthetics of the space-saving: home central air-conditioning in a unique position to save space and increase the aesthetics aspect. Now people are no longer confined to the room of requirements Ershiyiting, Sanshiyiting room, split-level room after another and so on. If the first with split air conditioning, more than three out of the machine must be installed, while apartments have outdoor unit installation location restrictions, not beautiful. At the same time, one in each room to hang the indoor unit is not the best looking, and central air conditioning only one outdoor unit, and can choose a variety of styles outlet, and the ceiling design combined Xuzhou central air conditioning repair, mounted on the roof. Each outlet can be individually controlled air-conditioning maintenance, arbitrarily adjust the room temperature. 6, home central air conditioning There are three types: water systems, wind systems and refrigerant system, the user can according to their residential characteristics, matching the different types of home central air conditioning. Air conditioning maintenance, Sheng Erda refrigeration, air conditioning repair prices provided by Xuzhou 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!