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