The blast control is not engaged, but blasting still occurs.
To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.
- Make sure the compressor is capable of supplying the minimum air flow requirement for your system (see technical specifications in the manual).
- Make sure the air inlet pressure gauge reads 100-175 psi (6.8-12 Bar, 0.68-1.2 MPa).
- If the gauge does not read 100-175 psi, check the air compressor for proper setup.
- Disassemble the main air regulator and check for obstructions.
- Replace or repair parts as necessary.
- Unplug the hose cable at the control box.
- If the blast stops, inspect the hose cable for shorted wiring.
- Check continuity through the electric blast control switch (the switch is normally open).
- Check for continuity across the connectors of the recessed plugs on the control box (there should be no continuity).
- If all above items are functional, replace the 4-way solenoid valve.
- Engage the Emergency Stop.
- If blasting stops, check the blast control switch by disconnecting the yellow tube at the enclosure male quick disconnect.
- There should be no air signal unless you engage the blast control switch.
- If the switch is functioning, remove the exhaust mufflers from the 4-way and check for debris, clean ports, and replace the mufflers if necessary.
- If all above items are functional, replace the 4-way solenoid valve.