Troubleshooting
7-3
Part 1602966−05
E 2015 Nordson Corporation
Corrective ActionPossible CauseProblem
4. Powder in feed
hopper not fluidizing,
or clouds of powder
erupting from surface
Fluidizing air pressure too low or
too high
Increase the fluidizing air pressure
until the powder is gently boiling.
Decrease the pressure if clouds of
powder are erupting from the surface.
Moist or oil-contaminated powder Check the air supply for water or oil.
Check the filters, separators, and air
dryer. Replace the powder in the
feed source if it is contaminated.
Refer to the next possible cause.
Fluidizing plate gasket leaking, or
fluidizing plate plugged, cracked,
or installed incorrectly
Check for air leaks around the
fluidizing plate gasket. If leaks are
found, replace the gasket.
Inspect the fluidizing plate for stains,
discoloration, polished surfaces, or
cracks. Replace it if contaminated,
plugged, or damaged. The plate
should be installed with the smooth
surface up (in contact with the
powder).
Incorrect ratio of reclaimed to virgin
powder
Increase or decrease the transfer
rate. The powder supply should be
no more than three parts reclaim to
one part virgin powder.
Uneven distribution of powder in
feed source
Check the powder and the fluidizing
plate for contamination as previously
described.
5. Powder in box not
fluidizing, or clouds
of powder erupting
from surface
Lance fluidizing air pressure too
low or too high
Increase the lance fluidizing air
pressure until the powder is gently
boiling. Decrease the pressure if
clouds of powder are erupting from
the surface.
Moist or oil-contaminated powder Check the air supply for water or oil.
Check the filters, separators, and air
dryer. Replace the box if the powder
is contaminated. Refer to the next
possible cause.
Fluidizing bar assembly leaking or
damaged
Raise the lance assembly and check
the fluidizing bars.
Vibratory table motor defective Check the vibrator motor. Refer to
Problem 6 for motor troubleshooting
procedures.
Continued...
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