AEC Self Cleaning Continuous Filters - Manual (Page 35)

Self Cleaning Continuous Filter Chapter 6: Troubleshooting 34
Problem Possible cause Corrective action
Debris in diaphragm valve. Remove debris.
Dirt in solenoid plunger.
Remove solenoid cover and
clean.
3.Entire row of bags
inadequately cleaned.
Solenoid valve inoperative.
Electric, solenoid, or timer fault.
Establish power to solenoid and
proper wiring to timer. Check
solenoid and if O.K. change
wiring at timer to next unused
terminal and move program
wire to highest numbered
terminal used or replace timer.
If solenoid defective, replace.
4. Random bag inadequately
cleaned.
Debris in air distribution pipe
hole.
Remove debris.
Excessive air flow.
Adjust fan damper until
pressure gauge indicates proper
pressure.
Compressed air pressure below
75 psig.
See Problem #2 on the previous
page.
Solenoids skipping.
Establish power to solenoid and
proper wiring to timer. Check
solenoid and if O.K. change
wiring at timer to next unused
terminal and move program
wire to highest numbered
terminal used or replace timer.
If solenoid defective, replace.
Reverse leakage through the
rotary valve. Check the rotary valve for wear
or damage and correct.
Clean plenum and inside of
bags.
Dust on inside of bags after
previous bag failure.
Always clean plenum before
installing new bags.
Blinding (purging) of bags due
to condensables.
Change operations upstream so
that liquids remain vaporized
through unit. May be necessary
to insulate the collector.
Usually operating the collector
with no solids flowing through
will permit recovery.
Re-entrainment of dust due to
hopper overloading, bridging, or
plugging.
Run out dust from discharge
system with main fan off,
consider increasing capacity of
discharge system or reducing
load and consider installing
hopper vibrators.
5. High differential pressure.
Improper timer sequence.
Inspect timer for proper
solenoid wiring and program
wire position.