Nordson 3400 Manual page 8

B 2-6
Pump
Adhesive Not Applying
Properly
(contd)
Problem
13. Adhesive charring in tank
14. Bead size does not change
when line speed changes
(KTL and MPC only)
B2EN-02-[3-PUMP]-5
Possible Cause
Adhesive in tank too hot
Tank overheating
Adhesive level too low
Adhesive oxidizing in tank
Air pressure to melter too low
Adhesive output exceeding adhesive
melt rate
Adhesive level too low
Nozzles clogged
41-3000
Issued 11/00
Corrective Action
Check the tank operating temperature
setpoint and adjust it as necessary.
Refer to the troubleshooting tables in
the Control System section.
Keep the tank at least half full of
adhesive. Refer to Adhesive Filling in
the Operation section.
Keep the lid closed when the melter
is operating. Change to a more
stable adhesive. Switch to a melter
with a nitrogen blanket.
Increase the air pressure. The
recommended range is
5.5–6.9 bar (80–100 psi).
Adjust the tank, hose, or gun
temperature settings.
Keep the tank at least half full of
adhesive. Refer to Adhesive Filling in
the Operation section.
Clean the nozzles. Refer to the
nozzle cleaning procedure in your
gun manual.
E 2000 Nordson Corporation
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