Problem
Problem
Problem
Cause
Cause
Cause
Solution
Solution
Solution
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 66
). 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.
The main air regulator is
malfunctioning or is stuck
open.
Disassemble the main air regulator and check for
obstructions. Replace or repair parts as necessary (see
).
The electric blast control
circuit is malfunctioning.
Inspect the hose cable for damaged or shorted wiring. Check
the 3A fuse and replace it if necessary. Check for continuity
through the connectors on the control box (P) and all external
cables. Check continuity through the electric blast control
switch (the switch is normally open). If all above items are
functional, replace the 4-Way solenoid valve.
The blast control switch
(B) is not engaged, but
blasting occurs.
The pneumatic blast control
circuit is malfunctioning.
Actuate the blast control switch (B) and check for proper
spool valve actuation in the 4-way valve. If no actuation
occurs, check the blast control switch by disconnecting the
yellow tube at the enclosure male quick-disconnect and
engage the control switch. If no air comes from the fitting,
check the pneumatic blast control filter. If the filter is clean,
replace the pneumatic blast control switch. If the switch is
functioning, make sure the yellow tubing inside the control
box (P) is properly connected and clear of obstructions. If
the tubing is clean, remove the exhaust mufflers from the
4-way and check for debris. Clean the ports and replace
the mufflers if necessary. If all above items are functional,
replace the 4-way solenoid valve.
The supply air pressure is
fluctuating
Make sure the compressor meets minimum flow
requirements and is operating properly. See
Technical Specifications, page 66
for more information on
flow requirements.
The main air regulator is
malfunctioning or is stuck
open.
Disassemble the main air regulator and check for
obstructions. Replace or repair parts as necessary (see
).
The electric blast control
circuit is malfunctioning.
Inspect the hose cable for damaged or shorted wiring. Check
the 3A fuse and replace if necessary. Check for continuity
through the connectors on the control box (P) and all external
cables. Check the continuity through the electric blast control
switch (the switch is normally open). f all above items are
functional, replace the 4-Way solenoid valve.
While the blast control
switch (B) is engaged,
the blast air flow is
fluctuating.
The pneumatic blast control
circuit is malfunctioning.
Actuate the blast control switch (B) and check for proper
spool valve actuation in the 4-way valve. If no actuation
occurs, check the blast control switch by disconnecting the
yellow tube at the enclosure male quick-disconnect and
engage the control switch. If no air comes from the fitting,
check the pneumatic blast control filter. If the filter is clean,
replace the pneumatic blast control switch. If the switch is
functioning, make sure the yellow tubing inside the control
box (P) is properly connected and clear of obstructions. If
the tubing is clean, remove the exhaust mufflers from the
4-way and check for debris. Clean the ports and replace
the mufflers if necessary. If all above items are functional,
replace 4-way the solenoid valve.
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