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Troubleshooting
ProblemProblem
Problem
CauseCause
Cause
SolutionSolution
Solution
The air supply is inadequate. Make sure the air inlet pressure gauge
reads 100-125 psi. If the gauge does
not read 100–125 psi, check the air
compressor for proper setup.
The Emergency Stop is engaged. Disengage the Emergency Stop.
Inadequate water supply to the
pump.
Make sure the water tank is full and the
inlet ball valve is open.
The pot pressure regulator is set
too low.
Increase the setting on pot pressure
regulator.
The pot bung cannot seal properly.
Clean all abrasive from the bung and
seal. Make sure the bung spring is lifting
and the bung is rmly against the seal. If
cleaning does not solve issue, replace
bung seal.
The Auto-Vent valve will not seal.
See Cleaning the Auto-Vent Valve, page
31.
The pot pressure relief valve is
discharging water.
Decrease the pot pressure to 145 psi
(10.3 bar, 1.03 MPa) or less. If the valve
weeps or relieves at 145 psi, replace
valve (Kit 17D785).
The pot or pump is leaking
pressure.
Make sure the abrasive ball valve and the
dump valve are closed. If pot pressure
gauge still creeps downward. See
Checking for Leaks, page 26.
The pot will not properly
pressurize.
The pot pressure regulator is
malfunctioning.
Replace the pot pressure regulator
assembly (17C132).
The air supply is inadequate. Make sure the air inlet pressure gauge
reads 100-125 psi. If the gauge does
not read 100–125 psi, check the air
compressor for proper setup.
The main air regulator is
malfunctioning.
See Repairing the Main Air Regulator,
page 28 (EQ600 – Kit 17C131, EQ300
– Kit 17C129).
The blast pressure will not
reach the desired set point.
The blast air regulator is
malfunctioning.
Replace the blast air regulator (Kit
17C625).
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