Troubleshooting

Is the gun clogged?

If no material comes out of the gun and the pressure gauge of the pipe indicates a pressure higher than the normal maximum operating pressure (20/25 bar), then:
 
  • Stop the machine by turning the main switch to the "0" position, release the pressure in the pipes by turning the bypass lever to the vertical position, then wait for the pressure indicated by the pressure gauge to drop to zero;
Before loosening a pipe fitting or disconnecting the gun, make sure that the pressure gauge indicates a pressure equal to zero and that there is no residual pressure in the pipes.
 
  • Remove the deflector, and if necessary, the gun, and remove the cause of the blockage. Before reassembling the deflector or the gun, make sure that the nozzle is free (clean it if necessary);
  • Restart the machine to check that the material comes out freely from the pipe, reconnect the gun and proceed with the work.
N.B. The operator must have been specifically trained to perform this operation. In particular, before opening a fitting, make sure that there is no residual pressure in the pipes and that there are no other people nearby. This potentially dangerous operation must always be performed by expert personnel and with the utmost caution.
 

Is the mortar pipe clogged?

Improper mixing or long pauses in pumping can cause the material hose to clog.
 
No material comes out of the gun and the mortar pressure gauge indicates a pressure higher than the maximum operating pressure (20/25 bar), therefore:
  • Close the air valve on the gun: the machine will stop;
  • Release the pressure in the hoses by turning the bypass lever to the vertical position (recycling) and wait for the pressure indicated by the pressure gauge to drop to zero before loosening a joint in the line or disconnecting the gun;
  • Locate the point where the hose is clogged, here it will be hard and rigid;
  • Disconnect the hose, hit the clog with a hammer to break the "plug" that has formed until the hardened material comes out.
  • Start the machine for a few moments and make sure that the hose has been freed, then the material will come out regularly.

 

Is the valve assembly clogged?

A mixture that is too rich in binder can cause the valves to clog.
 
No material comes out of the pipes and the mortar pressure gauge indicates a pressure of 0 bar, therefore:
  • Stop the machine by turning the main switch to the "0" position, release the pressure in the material pipes by turning the bypass lever to the vertical position (recycling);
  • Open the connections with the special key supplied;
  • Remove the valve inspection caps and remove the two rubber balls inside and carefully wash the intake and delivery valve bodies;
  • Remove the drain cap from the intake duct;
  • Change the mixing as indicated in the use and maintenance manual;
  • Empty the hopper, if necessary with a jet of water and wash all the material;
  • Reassemble everything, make the correct mixture and start again.

 

Is the engine belt slipping?

If the belt slips and the mortar pressure gauge indicates a pressure lower than 20 bar, then, in this case, tighten the belt using the contrast screw.
 
If it is damaged or no longer usable, proceed with the replacement.
 

Does the material come out of the tube discontinuously?

The material comes out of the pipe in a discontinuous way, so check:
  • The mixing of the material, if it is too sticky try to change the sand/binder ratio, try to avoid the use of aerating additives and avoid using hydrated lime;
  • That the gun and/or the nozzle are not obstructed by the pumped material and check that the air valve is completely open;
  • That the air tube is not bent and/or pinched;
  • That the valve seats are not worn or that there are no dried residues of previously pumped material. If they are worn, replace them.

 

The pump is not starting?

If the pump does not start, check:
  • That the air hose is not bent, also check the gun and the air nozzle, which if it were to be obstructed could cause the non-recycling of the air and therefore the blocking of the pump;
  • That the red emergency button is not pressed;
  • That the air hose or its connection do not have any leaks; this would cause a lower air pressure and therefore the shutdown of the pump;

 

The machine does not pump the material?

During the pumping phase, the pump may stop, or before the work phase even begins, problems may arise that prevent it from working, so check:
  1. That the safety device is not activated, then reset it by pulling the safety lever;
     
  2. That the gear has not been engaged, so the lever is in neutral position; stop the engine and engage the desired gear;
     
  3. That the material in the hopper has not run out;

    N.B. Keep in mind that allowing the hopper to empty during pumping can cause obstructions in the pipe line.
     
  4. That an incorrect mixing has not been done: the material cannot enter the valve group because it is too hard or too light. Check the consistency of the material and try another mixing of the material.

 

The pressure gauge shows no pressure?

If the pressure gauge does not show any pressure, there may be blockages or no material in the pipeline, so:
  • Check that the delivery valve assembly is not clogged, probably due to incorrect mixing: stop pumping, wash it and restart the process;
  • Check that the safety device is not active;
  • Check that the hopper is not empty, otherwise add the material; Keep in mind that allowing the hopper to empty during pumping can cause blockages in the pipeline line;
  • Check that you have performed correct mixing, because if this is not the case the material cannot enter the valve assembly because it is too hard or light.

 

Does the machine stop by itself while pumping?

If the machine suddenly stops during the pumping phase, check:
  • That the air tap is not partially closed, that the air hose is not bent and that the gun nozzle is not obstructed;
  • Checking the pressure gauge:
    - If the pressure is high, the hose or nozzle is clogged;
    - If the pressure is too low or absent, the suction valve assembly is clogged;
  • That the cable has the specified characteristics and that the required electrical energy is actually available.