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Conveying System Mechanical Components Chapter 6: Troubleshooting 99 of 138
Problem Possible Cause Possible Remedy
Dirty filter. Clean or replace
filter.
• Loose clamps, gaskets or
couplers. Tighten or
replace.
• Filter chamber discharge
flapper not sealing under
vacuum. Check for proper
operation; clean or repair
as needed.
• Check for faulty
compressed air blowback
solenoid. Check for
voltage signal during
cleaning cycle, proper
solenoid operation,
incorrect wiring, proper
compressed air
connection, and for worn
plunger in valve.
Vacuum line problem.
Disconnect the vacuum line
at the first vacuum hopper
and block it off. The vacuum
here should equal the
vacuum at the blower. Allow
a few seconds for vacuum to
build. If the vacuum here is
low, disconnect the piping
halfway to the first vacuum
hopper and check the
vacuum there. If proper
vacuum exists, the problem
is upstream. If not, work
backward to isolate the
vacuum loss.
Pump package blower
problem. Use a cfm/cfh
monitoring device to ensure
that blower cfm/cfh is to the
manufacturer’s
specifications. (Cont’d.)
Consult Service Engineer if
problem persists.
• Tighten loose pipe
couplers; replace worn
gaskets as needed.
• Replace any damaged
piping found.
Vacuum conveying rate is
declining due to a vacuum
loss in the system.
(Cont’d.)
Leaks in vacuum lines
between valves.
Check for leaks as described
in previous steps.