Refrigeration solenoid valve common breakdown phenomenon and knowledge. Fault phenomenon: electromagnetic valve does not work, after the power supply method: check whether the power connection bad, connectors and wiring connection again, check whether the power supply voltage is in range - plus or minus work To adjust to normal position, whether the coil desoldering - welding coil short-circuit again - replacement coil, working pressure difference is not appropriate to adjust the differential, or change of proportion of solenoid valve, fluid temperature is too high to replace solenoid valve, commensurate with the impurities to make electromagnetic valve of the main valve core and the moving core card dead - cleaning, such as a seal damage should be replaced seal and install the filter, the liquid viscosity is too large, the frequency is too high, and life and have to replace product failure phenomenon: electromagnetic Industrial Valves cannot be closed, elimination method: the main valve core or moving iron core of the seal is damaged, replace the seal, fluid temperature, viscosity is too high to replace of the solenoid valve, with impurities into the solenoid valve core production or moving iron core - cleaning, spring had come to life or deformation and replacement, orifice balance hole plugging and timely cleaning, working frequency is too high, or life and have to re-election product or update other fault condition: internal leakage to check whether the seal is damaged, whether the spring assembly adverse external leakage to joint looseness or seal has been bad, screw or replace seal electricity from time to tome noise - > leader on solid loose, tighten. Voltage fluctuation is not allowed within the scope of adjust voltage. Core surface impurities or uneven absorption, clean or replace in a timely manner. Example: air conditioner electromagnetic directional valve common faults and eliminate electromagnetic directional valve is a heat pump air conditioner, refrigeration and heating work conversion switch electromagnetic control valve, belong to two four-way valve. The main valve, pilot valve and electromagnetic coil of three parts. Is in addition to the compressor in air conditioner refrigeration system technology the most complex, precision parts, also is a trouble to inspection and maintenance, it is difficult to judge, not easy to troubleshoot a widget. In addition to the control circuit fault common faults of valve core not action, jams, leakage caused by the slider not action or action does not reach the designated position, etc. one If not the reversing solenoid Industrial Valves solenoid heart cannot move or slide, and fixed in one place, the air conditioner cooling or heating transformation. Generally the most common fault is only more cooling, not heating, at the same time cause the air conditioner met protection, blow a cold wind over the run outdoor, indoor machine don't blow hot air, according to trouble light after downtime. Solenoid valve coil short-circuit air-conditioner conversion operation of the heating, electromagnetic valve coil due to the short circuit current is too large, serious when burning main control board to fuse or trip cause, cause the machine doesn't work. Electromagnetic valve slide block deformation if the slider deformation, even if the solenoid coil has electricity, pilot valve valve core will not action, leading to the slider directional control does not reach the designated position, make the body internal mixes up, compressor within short cycle, high pressure gas formation caused by high temperature and high pressure, frequent thermal protection, eventually burn out compressor insulation. For the whole system, cut-off valve high pressure to low pressure side leakage, reduce high/low pressure difference. Usually involves not refrigeration, heating, or for the effect not beautiful. Coil of electromagnetic directional valve open circuit and short circuit or burn, valve core can not suck, causing slider not action. Should be replaced. Electromagnetic valve armature stuck valve core can't action, causing the slider is not action. Can open the body wash. Electromagnetic valve power supply voltage is lower than the rating, import and export pressure difference over open valve solenoid valve, often 'man' a noise in the valve at this moment, cause heart valve and can't do it. Should improve the power supply. Solenoid valve flow installation upside down, don't cause heart valve action. Flow should be adjusted. System of high temperature, high pressure and machine contains impurities, cause the slider deformation, jammed. Should be replaced as well. Remanent magnetization absorb heart valve or valve core is jammed, electromagnetic valve cannot be closed when the power is cut off. Cleaning the adjustment, if no effect change. Electromagnetic valve seal is damaged or tighten screw loosening, cause refrigerant leakage. Change the gasket and tighten the screws. on the capillary blocked or fracture; Or system cause serious leak slider not action. Clean the capillary capillary or with slightly rough fracture copper pipe welding. is memory is dirt, needle valve seat or valve is damaged and the spring force is too small, cause electromagnetic valve closed lax. Clean and adjust or replace the spring. In addition, if the reversing valve internal leakage, high pressure refrigerant gas leak to the low voltage side, can't make establish normal pressure on both ends of the reversing valve piston, reversing valve should be replaced. If cooling system pressure difference is too big, cannot make the reversing valve commutation, or find leak point pressure check the refrigeration system, and fill the refrigerant. If four-way valve block is not action or action does not reach the designated position, check the judge can use the screwdriver with wooden handle, tapping the body, is not connected or disconnected when ac 220 v power supply, repeated several times, heard a armature chorus and body gas reversing sound absorption, can determine the reversing Industrial Valves basic returned to normal work.
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