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Problem
Problem
Problem
While in BLAST mode,
The abrasive ball valve is
with the blast control
closed.
switch (B) engaged,
The abrasive metering valve
air is flowing from the
is not properly set.
nozzle but little or no
abrasive is flowing from
The pot does not have a
the nozzle.
sufficient amount of abrasive.
The pinch valve does not
open.
There is an obstruction inside
the pot or inside the abrasive
hose between the pot and the
enclosure.
The pot pressure is too low.
The blast pressure is too high.
The blast control switch
The air supply is inadequate.
(B) is not engaged, but
blasting occurs.
The main air regulator is
malfunctioning or is stuck
open.
The electric blast control
circuit is malfunctioning.
The pneumatic blast control
circuit is malfunctioning.
3A3489E
All manuals and user guides at all-guides.com
Cause
Cause
Cause
See
See
See
Engage the blast control switch (B) and check for actuation
of the pinch valve. If there is no actuation, disconnect the
orange tubing at the pinch valve. If the pinch valve opens and
source air is coming from the orange tubing, confirm that the
tubing is correctly routed. If the pinch valve does not open,
replace it. If the pinch valve opens and there is no source air
coming from the tubing, inspect the mufflers on the 4-way
valve for debris. If debris is not present, clean or replace the
4-way valve.
Follow
Pressure Relief Procedure, page
hose disconnected, inspect the interior of the pinch hose
for obstructions or debris and replace if necessary (see
Replacing the Pinch Hose, page
from the bottom of the pot. Inspect the bottom of the pot and
the abrasive hose for obstructions or debris.
With the blast control disengaged, allow the pot to pressurize
and wait for the pump to stall. If the pot pressure gauge does
not reach 185 psi (12.75 bar, 1.275 MPa), see the "Unable to
fill or pressurize the pot with water" problem listed in this table.
If the blast pressure gauge reads 160 psi (11.03 bar, 1.10
MPa) or greater, it may not be possible to achieve greater
than 15 CPM on the MediaTrak. This is more common with
fine mesh abrasive usage. Decrease the blast pressure to
100 psi (6.9 bar, 0.69 MPa) to see if CPM can be increased.
Make sure the air compressor is capable of supplying
the minimum air flow requirement for your system (see
Technical Specifications, page
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 (see
Enclosure Box Parts, page
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 (B) (the switch is
normally open). Check for continuity across 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 (Q). If blasting stops, check the
blast control switch (B) by disconnecting the yellow tube at
the enclosure male quick disconnect. There should be no
signal air unless you engage the 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.
Solution
Solution
Solution
Setting Up the Equipment, page
Setting Up the Equipment, page
Refilling the Pot with Abrasive, page
Draining the Pot, page
22, followed by the
67). Make sure the air inlet
50).
Troubleshooting
14.
14.
21.
10. With the abrasive
32). Remove the tri-clamp
27
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