Hisense KFR-3601GW air conditioning units turn the outdoor unit does not start the focus should be checked: 1, the flow through the outdoor unit 300V power supply is normal; 2, with a multimeter to test the power module switch, if there is a short circuit or open circuit breakdown phenomenon does not work ; 3, whether to issue the compressor start "buzzing" sound, or a larger shock; 4, the DC voltage detection circuit is normal. The figure is the Hisense KFR-3601GW inverter outdoor unit control circuit power supply circuit diagram. Fault detection: Check the outdoor unit control circuit switching power supply output section, each group found no voltage output: measured switch collector and emitter voltage of 300V, work properly; remove the switch, use a multimeter to "diode" test Most stalls measured and found open between b, e pole (emitter), concluded that the switch is damaged. Replacement of the same type switch, power test machine Xuzhou central air conditioning maintenance, troubleshooting. The air conditioner is inverter-type air conditioners, indoor and outdoor unit has a control circuit. In this case the outdoor unit is not working properly, mostly outside the control circuit, the DC power supply or inverter power module failure how to identify the effect of the three water hazards circulating water system is scaling, corrosion, microbial bacteria and algae, the differential effect of water treatment services is based on the merits of these three aspects. "Industrial circulating cooling water treatment design specifications" (GB50050-95) gives several indicators: a open-system fouling resistance values:. 1.72 × 10-4-3.44 × 10-4m2K / W2 closed system. dirt thermal resistance less than:. 0.86 × 10-4m2K / W3 corrosion rate of carbon steel pipe wall is less than 0.125mm / a4 copper, copper alloy and stainless steel corrosion rate is less than the wall 0.005 mm / a5 open recirculating cooling water systems. heterotrophic bacteria count of less than 5 × 105 个 / ml; slime less than 4ml / m3 circulating water system water treatment company should be given regular water analysis report Xuzhou central air conditioning maintenance, according to the water quality of water treatment chemicals and dosing of the country Xuzhou different central air conditioning repair parts, there is a corresponding reference index, the user can determine the treatment effect based on a preliminary analysis of water quality, but can be used for coolant water bubble test sheet and chilled water, cooling water ways coupon site monitoring. Xuzhou central air conditioning central air conditioning repair parts _ _ Sheng Erda provided by Xuzhou 圣尔达 Refrigeration Refrigeration Electrical Services Limited. Xuzhou 圣尔达 Refrigeration Electrical Services Limited (xzktw.com) strong, credible, in Xuzhou heat exchangers, 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 and you hand into the brilliant, for a better future!