Under what circumstances the central air-conditioning and fluoride? Try: home central air conditioning is turned on for half an hour, if we reach the set temperature (cooling capacity of air conditioning and room matching), while running lamp is lit off for a while (like refrigerator compressors as open for a while to stop for a while) central air conditioning failure alarm does not boot, otherwise, but the lack of fluoride phenomenon. Second test: The thermometer indoor unit inlet and outlet temperature difference, the difference is more than 10 degrees, even if the normal central air-conditioning maintenance. The difference between the effect of a good air-conditioning up to 15 degrees. Small temperature difference is the lack of fluoride. Three to see: home central air-conditioning in the boot 15 minutes, open the indoor unit panel, you should see a uniform covered with condensed water central air-conditioning fault finding on the evaporator, if half of the children do not freeze or frost is not normal. Central air-conditioning installation of the attention to what issues? Home central air conditioning central air conditioning failure as Tianjin, one of the low pressure alarm appliances in the installation is a lot of stress. In order to ensure air conditioning products can run a normal and efficient central air-conditioning failure, these details on the installation can not be ignored. 1, select the installation location should be selected in a well-ventilated outdoor unit to ensure proper cooling, there is enough space for maintenance. 2, as much as possible in its operating noise does not affect the neighbors place to live, good security without increasing the noise in the fastening stage 3, the installation environment, try to curb unrest in the rain water is easy to place 4, where you want to install central air-conditioning away from flammable gas leak, so as not to cause a fire.