Air conditioner pneumatic valve solenoid directional common failures and troubleshooting methods

If four-way solenoid slider not action or action does not reach the designated position, check the judge can use the screwdriver with wooden handle, tapping the pneumatic valve body and is not connected or disconnected when v ac power supply, repeated several times, heard a armature chorus and pneumatic valve body gas reversing sound absorption, can determine the reversing pneumatic valve basic returned to normal work.