Nordson Spectrum VT Feed Center, Product Manual

Page: 57 / 105

Troubleshooting
6-3
Part 1611362 − 01
E
2018 Nordson Corporation
Corrective Action Possible Cause Problem
2. Powder escaping
from enclosure
openings
Afterfilter cartridge filters clogged;
pulsing not cleaning filters
Check the pulse air pressure.
Check the cartridge filter pulse
sequence.
If the Off duration is too short the
pulse manifold may not build up
enough pressure to blow off the
cartridge filters.
If the On duration is too short not
enough air is released to blow off the
filters.
If the On duration is too long the
pulse manifold may not be able to
build up enough air pressure.
Replace the cartridge filters if pulsing
does not correct the problem.
Pulse pressure too low Increase the pulse pressure to the
recommended level.
Pulse valve failed Replace the pulse valve.
Cartridge filters leaking Check the cartridge filter gaskets and
media for damage. Replace filters as
necessary.
Cross drafts interfering with
exhaust fan draw
Check for cross drafts at the
enclosure opening. Eliminate or
divert drafts.
Fan rotation backward Reverse the motor rotation.
Access panels not sealed Tighten all access panels. Check and
replace the panel gaskets as
necessary.
3. Hopper level sensors
giving a false positive
reading
Level sensors not threaded
properly
Ensure level sensors are 1 or 2
threads into the hopper.
4. No feed hopper
fluidizing air
Afterfilter fan not running, interlock
valve closed
Start the afterfilter exhaust fan.
Check feed center E
− stop.
Check valve connections.
Fan interlock circuit or solenoid
valve circuit defective
Check the fan interlock wiring
between the feed center panel and
main system panel.
Check the wiring from the feed center
panel to the solenoid valve assembly
on top of the feed center air drop.
Fluidizing air regulator defective Check the fluidizing air regulator.
Continued...