Pump
B 2-2
E 2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
These troubleshooting tables describe the kinds of adhesive application
and pump-operation problems you may encounter and provide corrective
actions for handling those problems. When necessary, the tables refer to
more detailed diagnostic procedures. Refer to the appropriate
troubleshooting table for the type of problem you are experiencing:
S Adhesive Not Applying Properly
S Pump or Motor Not Working
Problem
Possible Cause Corrective Action
1. Little or no adhesive output Melter not at operating temperature Wait for the time delay to expire and
the SYSTEM READY light to turn on.
Adhesive level too low Keep the tank at least half full of
adhesive. Refer to Adhesive Filling in
the Operation section.
Adhesive too cold Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Motor speed and/or pressure control
dials not properly set
Set the motor speed and/or pressure
control dials to the normal operating
setting.
Clogged manifold filter Clean the manifold filter. Refer to
Cleaning a Manifold Filter in the
Maintenance section.
Blockage in manifold Check for blockage. Refer to
Manifold Blockage Check.
Circulation control valve or pressure
control valve not properly set or
clogged
Check the circulation control or
pressure control valve. Refer to
system flushing procedure for DC
gear pump systems in the Installation
section to set up the valve.
Cold hose-to-melter or hose-to-gun
joints
Insulate the joints.
Guns not operating properly Refer to the gun manual to
troubleshoot gun problems.
Manifold heat exchanger blocked Check manifold heat exchanger for
blockage. Clean if necessary.
2. Troubleshooting Tables
Adhesive Not Applying
Properly
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