No blast air flow when the blast control switch is engaged. The water pump DOES NOT cycle while the blast control switch is engaged.

To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.

  • Disengage the emergency stop.
  • Make sure the air compressor is capable of supplying the minimum air flow requirement for your system (see Technical Specifications in manual, for more information).
  • Make sure the air inlet pressure gauge reads 100-150 psi (6.8–10.3 bar, 0.68–1.03 MPa).
  • If the gauge does not read 100–150 psi, check the air compressor for proper setup (consult your air compressor manual, see Related Manuals in manual).
  • Actuate the blast control switch and check for proper spool valve actuation in the 4-way solenoid valve.
    • If no actuation occurs, check the blast control switch and twin-line by disconnecting the yellow tube at the enclosure male quick disconnect and engage the control switch.
    • If no air comes from the fitting, check for signal air at the blast control switch.
    • Replace the pneumatic blast control switch if signal air does not pass through the valve when the handle is depressed.
  • If the switch is functioning, ensure that the yellow tubing inside the control box is properly connected and clear any obstructions.
  • If the tubing is clean, replace the 4-way solenoid valve.