Check water filter screen for trash.

Open convenience water valve to ensure water pump is pumping water.

Pot is not sealling. Check for leaking valves and gaskets.

Remove blast nozzle and check for obstructions stuck in nozzle.

Blast hose sizes are inconsisent and causing grit to accumlate at connections.

Irregular blast media that doesn't make a slurry and flow evenly.

Pot pressure is set too high over the blast pressure causing water to cut through the media inside the pot.

Pot pressure gauge out of calibration. Should read dead "0" with pot open.

Surface rinse valve may be open.

Pot pressure is set over 150 psi.

Relief valve is defective and needs to be replaced.

Pot pressure gauge out of calibration. Should read dead "0" when open.

Twin line is plugged with rash (mud diver nest).

Parker solenoid switch inside panel is stuck/defective.

Autoair valve inside panel is stuck/defective.

Not enough pot pressure.

Increase abrasive meter setting (counterclockwise).

Autoair valve is stuck in open position. Either stuck or defective. Clean first.

Parker solenoid valve stuck/defective.

Air in pot. Bleed air out using purge valve on side of pot.

Blast hose size not consistent and clogging at fittings.

Nozzle has obstruction lodged inside.

Pilot regulator inside panel dirty or defective.

Autoair valve dirty or defective.

Pilot regulator dirty or defective.

May need more blast pressure for the type of abrasive being used.

375 CFM air compressor minimum is required to operate machine.

Pressure setting of compressor should be 120-150 psi.

Blast pressure gauge may be out of calibration. Should read dead "0" with compressor air off.