Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
Problem
Problem
Problem
Cause
Cause
Cause
Solution
Solution
Solution
The emergency stop (Q) is
engaged.
Disengage the emergency stop (Q).
The air supply is inadequate.
Make sure the air compressor is capable of supplying
the minimum air flow requirement for your system (see
Technical Specifications, page 67
). 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. Make sure the air inlet filters
are clean, and replace if necessary.
Systems
Systems
Systems with
with
with water
water
water tanks:
tanks:
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.
Inadequate water supply to
the pump
Systems
Systems
Systems with
with
with pressurized
pressurized
pressurized supply
supply
supply connection:
connection:
connection: Ensure water
supply connection is connected and pressurized. Check
that water supply meets appropriate pressure and flow
requirements, see
Setting Up the Equipment, page 14
step
1. Ensure all fitting connections are tight. Check inlet water
pressure regulator for proper flow direction installation
see
EQm Parts, page 34
, or
EQs2 Parts, page 40
. Check
inlet water pressure regulator screen filter for debris, clean if
possible. Replace regulator if no flow can be passed through
regulator.
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 100 psi (6.9 bar, 0.69 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 100 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 OFF position. Open rinse
valve and ensure pump cycles, and water flows from rinse
hose. Close rinse valve and verify that pump stalls. If pump
continues to creep or will not prime, refer to manual 333397
for pump service.
The pop-up cannot seal.
Make sure the pop-up is clean and free of debris in the o-ring
sealing area. Check for proper pop-up alignment in the closed
position (there should be no gaps between the o-ring and the
pop-up). Remove the o-ring and make sure the o-ring gland
is clear of debris. Replace the o-ring and/or pop-up if worn.
Unable to fill or
pressurize the pot
with water.
The water pressure regulator
is malfunctioning.
Adjust the water pressure regulator until the pot pressure
gauge reads 185 psi (12.75 bar, 1.275 MPa). If this
adjustment is not possible, service the water pressure
regulator (see manual 309474).
The abrasive ball valve was
left open during shut down.
See
Shutting Down, page 21
, step 2.
The abrasive ball valve is
worn.
With the pot pressurized and the abrasive ball valve closed,
engage the blast control switch (B) and check to make sure
the pump is stalled. If the pump rod is creeping, replace the
abrasive ball valve (M).
The blast hose recoils
heavily when the blast
control switch (B) is
engaged. Large slugs
of abrasive and water
are ejected from nozzle.
The pinch hose is worn.
With the pot pressurized and the abrasive ball valve
open, check to make sure the pump is stalled. If the
pump rod is creeping, replace the pinch hose. See
Replacing the Pinch Hose, page 32
.
3A3489E
25
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