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, the 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) The same model with the same parameters varistor protective tube put in Xuzhou Hitachi central air conditioning sales, air-conditioner is working properly. If not the same type varistor on hand, emergency method is temporarily not Varistor power test machine. 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 Xuzhou central air conditioning, cleaning and maintenance, or outside the machine does not start changing the indoor pipe temperature sensor There is a plug on the show fault code Displaying and operating fault code is not the same, plug the power supply or the display is usually a signal line, a motherboard problem. Running for some time displays general sensor problem. Thermal protection repair the air conditioning and fluoride old! Today to an air conditioning and fluoride, air conditioning, a little old, about 2 o'clock in the afternoon. Plus a little bit. 0.3 gauge, ammeter 3.8A. Then add a few moments, the gauge 0.4 Xuzhou precision air-conditioning maintenance, meter beyond the rated current of 4A 4.2 meter nameplate off the table valve central air conditioning, a sudden current blooms 7.2A, next to the thermal protection. Then emptying the master table when the table is negative did not notice. Unscrew the screws fluoride tube, which may enter the air. Causing the ice block. Stopped two hours later, open air survey meter gauge 2.6A 0.3, then add a little bit to open the valve, pressure gauge 4.5 meter 4.2A dare added. Just above the three-way valve and a small amount of frosting finish. Should still have a little lack of fluoride, but the current is already high, what is the press is faulty, or capacitance effect declined? Or are there other reasons? (This machine is cold before the exchange, now replaced by cooling only, fan and compressor using a power cord) Sheng Erda air conditioning repair center to remind you: two reasons outside electrical and mechanical wind capacity is not enough, there is the compressor problem. Xuzhou central air conditioning repair parts | Sheng Erda refrigeration | central air-conditioning is provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou central air conditioning repair parts | Sheng Erda refrigeration | central air-conditioning is Xuzhou Sheng Erda Refrigeration Electrical Services Limited (xzktw.com) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: Liu Wanhai.