四通阀故障的判断及处理（Fault diagnosis and treatment of four way valve）.doc

四通阀故障的判断及处理（Fault diagnosis and treatment of four way valve） Taolibuyan xiazichengqi. Orderly and progressive, familiar with the fine si. Thanks to welcome Sir heart broken, lashing people sad. The learning without effort, beginning as young old Kung fu. On high, wed be two birds flying wing to wing. On earth, two trees with branches twined from spring to spring。 Fault diagnosis and treatment of four way valve 1., why will cause electromagnetic four reversing valve does not change? How to check and repair? The reason why the electromagnetic four way reversing valve does not change is: The burning of the electromagnetic coil. Cut off the power supply and use the multimeter R*1 to measure the DC resistance value and the on-off condition of the electromagnetic coil. When the measured DC resistance value is much smaller than the specified value, it shows that the electromagnetic coil has partial short circuit. Should replace the same type of electromagnetic coil, in the replacement, should pay attention to before the coil is inserted into the center of the magnetic core, cant do electricity check, otherwise easy to burn the coil. The vent holes on the piston valve is blocked. The valve piston vent diameter is only 0.3mm., although the hole before the filter, if the refrigeration system is not clean, easily blocked, can not change the cause of failure. For this kind of fault, the following treatment can be carried out as follows: repeatedly switching on, cutting off the circuit of the electromagnetic coil, reversing the reversing valve so as to flush the dirt. If it is still blocked, remove the reversing valve to wash or replace the electromagnetic four way reversing valve. The leaking valve piston bowl. Turn the temperature control knob of the refrigerating air conditioner clockwise until the air conditioner stops working. After 3min, the high and low pressure tend to balance, and the reversing valve is energized again. So repeated several times, if still invalid, can o