Operation
22 3A4802D
Troubleshooting
NOTE: Always perform the Pressure Relief Procedure
on page 7 before servicing or repairing any equipment.
Problem Cause Solution
Unable to fill or pressurize the
pot with water
Air supply valve is closed Open the air supply valve.
The air supply is inadequate. Make sure the air compressor is capable of
supplying the minimum air flow requirement
for your system (see Technical Specifica-
tions on page 45). 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. Make sure the air inlet fil-
ters are clean, and replace if necessary.
Inadequate water supply to the pump Systems with water tanks: Make sure the
water tank is full and the inlet ball valve is
open. Clean or replace water inlet filter if
necessary. Make sure all fitting connections
are tight.
Systems with pressurized supply connec-
tion: Make sure the water supply connection
is connected and pressurized. Check that
the water supply meets appropriate pressure
and flow requirements (see Setting Up the
Equipment on page 12, step 1). Make sure
all fitting connections are tight. Check inlet
water pressure regulator for proper flow
direction installation (see Parts on page 32).
Check the inlet water pressure regulator
screen filter for debris, clean if possible.
Replace regulator if no flow can be passed
through the regulator.
Make sure the water inlet pressure regulator
is not used if siphon feeding or using an
external water tank.
The water pump air regulator is
malfunctioning.
Disengage the blast control switch (B).
Adjust the pump inlet air pressure regulator
until the pump air pressure regulator gauge
reads 50 psi (3.4 bar, 0.34 MPa). If you are
unable to attain this setting, check the air
inlet filters and make sure the supply air
pressure is greater than or equal to 50 psi. If
the above steps do not resolve issue,
replace the pump air pressure regulator.
The water pump is malfunctioning. Rotate 3-way selector valve to WASH posi-
tion. Verify that pump stalls. If pump contin-
ues to creep or will not prime, refer to
manual 3A5023 for pump service.
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