Troubleshooting
6-4
Part 1611362
−
01
E
2018 Nordson Corporation
Corrective Action
Possible Cause
Problem
5. 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 it is
contaminated, plugged, or damaged.
The plate should be installed with the
smooth surface up (in contact with
the powder).
Incorrect ratio of reclaimed to fresh
powder
Increase or decrease the transfer
rate. The powder supply should be
no more than three parts
reclaim
−
to
−
one part fresh powder.
Uneven distribution of powder in
feed source
Check the powder and the fluidizing
plate for contamination as previously
described.
6. Large dump valve on
bottom of hopper
leaking air/powder
Flange failure of rubber pinch
valve bladder
Replace valve bladder.
7. Large dump valve on
bottom of hopper not
closing fully
SMC valve pack regulator on roof
of unit may be set to low.
Verify the regulator is set to 0.3 bar
(4.4 psi).
8. Hopper not cleaning
completely
Low system air pressure during
color change.
Recommended operating pressure
for feed center is 100 psi consistently
throughout color change (never less
than 87 psi). Lower system air
pressure will require additional
time/pulses to clean the hopper. Use
operator interface to increase number
of pulses to the hopper.
Note
: Hopper cleaning consistency
will also vary based on the number of
spray guns in the system. Lower gun
counts may also require additional
cleaning time.
9. Contaminants in feed
hopper powder
Sieve screen torn
Replace the screen.
Sieve screen not thoroughly
cleaned before installation
Remove and clean the sieve screen.
Continued...
Содержание Spectrum VT Feed Center
Страница 4: ...Change Record ii Part 1611362 01 E 2018 Nordson Corporation...
Страница 8: ...Table of Contents vi Part 1611362 01 E 2018 Nordson Corporation...
Страница 12: ...Safety 1 4 Part 1611362 01 E 2018 Nordson Corporation...
Страница 24: ...Description 2 12 Part 1611362 01 E 2018 Nordson Corporation...
Страница 52: ...Operation 4 24 Part 1611362 01 E 2018 Nordson Corporation...
Страница 64: ...Troubleshooting 6 10 Part 1611362 01 E 2018 Nordson Corporation...
Страница 86: ...Repair 7 22 Part 1611362 01 E 2018 Nordson Corporation...
Страница 90: ...Parts 8 4 Part 1611362 01 E 2018 Nordson Corporation Hopper 10014043 4 5 7 8 6 1 2 3 Figure 8 2 Controller...
Страница 100: ...Diagrams 9 2 Part 1611362 01 E 2018 Nordson Corporation...
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