1. Fault four: the main discharge door can not be opened

     A:The failure performance

  When the mixing station is working automatically, the main discharge door cannot be opened, and when the mixing is finished, the discharge indicator lamp is not on

     B:There may be some reasons:

  The discharge gate and a foreign body or product material sealing plates; insufficient gas system pressure, cylinder leakage or oil mist damage; off the connection between the electromagnetic valve and relay, relay virtual connection or damage; solenoid valve coil burning or spool; a time relay is damaged, causing PLC normal input signal.

     C:The way to deal with concrete mixing plant failure is to:

  If between the discharge gate and the sealing plate of a foreign body or product material, should clean up foreign bodies, buildup and flush the discharge door; if insufficient gas system pressure, cylinder leakage or oil mist damage, should check the oil mist, joints, and other parts of the cylinder is damaged; if the connection between the electromagnetic valve and relay off the virtual connection or relay damaged, should check the relay contact output and wiring, and replace it as necessary; if the solenoid valve coil burning or spool, should replace the solenoid valve; if the time relay is damaged, should be replaced.

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