Nordson 3400 Manuale utente
E2000 Nordson Corporation
All rights reserved 41-3000
Issued 11/00 B2EN-02-[3-PUMP]-5
Part B, Section 2
Pump
This section covers the following unit configurations.
Model 3400
3500
3700
3860
3890
3960
Voltage 1, 2
Pump DC Gear (O, R, S, T, U, or W)
Manifold 4-Port (J or F)
6-Port (K, L, O, or P)
2-Port (R or U)
Control MultiScan (3)
Pump
B 2-0
E2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
Pump B 2-1
E2000 Nordson Corporation
All rights reserved 41-3000
Issued 11/00 B2EN-02-[3-PUMP]-5
Section B 2
Pump
WARNING: Allow only qualified personnel to perform the
following tasks. Follow the safety instructions in this document
and all other related documentation.
This section includes troubleshooting procedures for adhesive application
problems and pump troubleshooting procedures and repair procedures.
Refer to the Parts section for the part number of any pump component
that needs to be replaced. If you try all the suggestions in this section
and still cannot solve the problem, call your Nordson representative for
assistance.
Refer to the Control System section for troubleshooting procedures and
repair procedures for the melter’s control system, including the
key-to-line (KTL) and motor and pressure control (MPC) features. For
hose or gun troubleshooting, refer to your hose or gun manual.
The following sections of this manual contain additional information on
the hydraulic system:
STechnical Data includes pump specifications.
SMaintenance includes a procedure for checking the pump motor
speed reducer.
STank and Manifold includes procedures for replacing the tank,
manifold, drain valve, pressure relief valve, circulation control
valve, and pressure control valve.
If your melter has any of the following options, refer to the Options
section at the end of this manual for additional troubleshooting, repair,
and parts information:
SInput/output (I/O) board
SLow-level switch
SElectric line filter
SPressure dump
1. Introduction
Pump
B 2-2
E2000 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:
SAdhesive Not Applying Properly
SPump 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
Pump B 2-3
E2000 Nordson Corporation
All rights reserved 41-3000
Issued 11/00 B2EN-02-[3-PUMP]-5
Problem Possible Cause Corrective Action
2. Wavy beads Adhesive too cold Check the tank, hose, or gun
temperature setpoints and adjust
them as necessary.
Ambient temperature below freezing
or guns subject to draft Protect the melter and guns from
freezing temperature conditions and
drafts.
Nozzles too far from product Position the guns so the nozzles are
no more than 13 mm (0.5 in.) from
the product.
3. Excessive adhesive at
beginning of bead Nozzles too far from product Position the guns so the nozzles are
no more than 13 mm (0.5 in.) from
the product.
Nozzles partially clogged Clean the nozzles. Refer to the
nozzle cleaning procedure in the gun
manual.
4. Adhesive stringing Nozzle too far from product Position the guns so the nozzles are
no more than 13 mm (0.5 in.) from
the product.
Adhesive too viscous Change to a compatible
lower-viscosity adhesive.
Adhesive too cold Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Adhesive old Do not exceed the recommended pot
life of the adhesive.
5. Concentric circles in bead Adhesive too hot Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Adhesive not viscous enough Change to a compatible
higher-viscosity adhesive.
6. Adhesive bouncing or
splashing from product Adhesive too hot Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Adhesive not viscous enough Change to a compatible
higher-viscosity adhesive.
Nozzle orifice too large for
application Change to a nozzle with a smaller
orifice.
Too much hydraulic pressure Decrease hydraulic pressure.
Continued on next page
Pump
B 2-4
E2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
Problem Possible Cause Corrective Action
7. Adhesive not penetrating
product Adhesive too cold Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Special coating on product Increase operating temperature
setpoints slightly or change
adhesives.
Not enough adhesive being applied Change to a higher-flow nozzle,
increase operating temperature
setpoints slightly, or increase
hydraulic pressure.
Adhesive too viscous Change to a compatible
lower-viscosity adhesive.
8. Air or moisture in bead Adhesive level too low Keep the tank at least half full of
adhesive. Refer to Adhesive Filling in
the Operation section.
Adhesive too viscous Change to a compatible
lower-viscosity adhesive.
Product wet Preheat the product.
9. Adhesive gelling Changing to an adhesive
incompatible with the previous
adhesive without first cleaning the
system
Clean the system. Refer to Cleaning
the System in the Maintenance
section.
Flushing Type-R cleaning fluid
through a system that was using
polyamide, surlyn, polyester, or
some other high-performance
adhesive
Clean the system. Refer to Cleaning
the System in the Maintenance
section. If the gelled adhesive cannot
be pumped out, replace the
tank/manifold assembly, hoses,
and/or guns.
Adhesive heated for too long Clean the system. Refer to Cleaning
the System in the Maintenance
section. Do not exceed the
recommended adhesive pot life.
Adhesive overheated Clean the system. Refer to Cleaning
the System in the Maintenance
section. Decrease the operating
temperature setpoints.
Adhesive Not Applying
Properly (contd)
Pump B 2-5
E2000 Nordson Corporation
All rights reserved 41-3000
Issued 11/00 B2EN-02-[3-PUMP]-5
Problem Corrective ActionPossible Cause
10. Adhesive drooling from gun Guns not applying adhesive properly Refer to the gun manual to
troubleshoot gun problems.
11. Cartons popping open Adhesive not cooling fast enough Decrease hydraulic pressure to
decrease the bead size. Decrease
the operating temperature setpoints
slightly. Reduce the line speed
through the compression section.
Increase the distance between the
nozzles and the product. Increase
the distance between bead
application and bead compression.
Increase the length of the
compression section. Cool the
product. Use a lower-flow nozzle.
Use a stitched bead pattern.
Adhesive open time too long Change to an adhesive with a shorter
open time.
Adhesive cooling too fast Increase the hydraulic pressure to
increase the bead size. Increase the
operating temperature setpoints
slightly. Decrease the distance
between the nozzles and the product.
Decrease the distance between bead
application and bead compression.
Heat the adhesive. Use a higher-flow
nozzle. Avoid stitched bead patterns.
Protect the gun or bead from cold air.
Adhesive deposit shearing Check for twisting or other adverse
movement during the compression
section.
12. Adhesive fuming or
smoking Adhesive in tank too hot Check the tank operating temperature
setpoint and adjust it as necessary.
Unstable adhesive Keep the lid closed when the melter
is operating. Change to a more
stable adhesive.
Continued on next page
Pump
B 2-6
E2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
Problem Possible Cause Corrective Action
13. Adhesive charring in tank Adhesive in tank too hot Check the tank operating temperature
setpoint and adjust it as necessary.
Tank overheating Refer to the troubleshooting tables in
the Control System section.
Adhesive level too low Keep the tank at least half full of
adhesive. Refer to Adhesive Filling in
the Operation section.
Adhesive oxidizing in tank Keep the lid closed when the melter
is operating. Change to a more
stable adhesive. Switch to a melter
with a nitrogen blanket.
14. Bead size does not change
when line speed changes
(KTL and MPC only)
Air pressure to melter too low Increase the air pressure. The
recommended range is
5.5–6.9 bar (80–100 psi).
Adhesive output exceeding adhesive
melt rate Adjust the tank, hose, or gun
temperature settings.
Adhesive level too low Keep the tank at least half full of
adhesive. Refer to Adhesive Filling in
the Operation section.
Nozzles clogged Clean the nozzles. Refer to the
nozzle cleaning procedure in your
gun manual.
Adhesive Not Applying
Properly (contd)
Pump B 2-7
E2000 Nordson Corporation
All rights reserved 41-3000
Issued 11/00 B2EN-02-[3-PUMP]-5
WARNING: Risk of electrical shock. Failure to observe
electrical safety procedures may result in equipment damage,
personal injury, or death. Allow only qualified personnel to
perform electrical troubleshooting. Observe all high voltage
indicators.
Problem Possible Cause Corrective Action
1. Pump not turning but motor
running Misaligned, damaged, or loose chain
or damaged or worn sprockets Check the motor chain and sprockets.
Refer to Motor Chain and Sprocket
Check.
2. Motor fails to start Melter not at operating temperature Wait for the time delay to expire and
the SYSTEM READY light to turn on.
Motor speed control dial set at 0 Change the setting.
Blown fuse Remove the electrical enclosure lid
and check the input power neon on
the motor control interface board. If
the neon is off, replace the fuses.
Failed motor control interface board Measure the input voltage to the
motor control board at J2-6 and J2-8
on the motor control interface board.
If you do not measure line voltage,
replace the motor control interface
board.
Failed motor drive board Measure the voltage at the motor
drive board A+ (red wire no. 31) and
A- (black wire no. 31) wires. If the
voltage is less than 10 VDC, replace
the motor drive board.
Continued on next page
Pump or Motor Not Working
Pump
B 2-8
E2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
Problem Possible Cause Corrective Action
2. Motor fails to start (contd.) Loose wire nut connections Disconnect and lock out electrical
power to the melter. Remove the
cover on the bottom of the motor and
inspect the wire nuts connections.
Tighten any loose connections.
Failed ribbon cable on motor control
board Disconnect ribbon cable no. 31 (red
and black) from the motor control
board and check the continuity. If
there is no continuity, replace the
ribbon cable. If there is continuity,
replace the motor. Refer to Checking
a Ribbon Cable in the Control System
section.
Melters with I/O board: Failed
I/O board Check the status of the motor stop
input. If the status is not okay,
change the I/O board input.
Failed ribbon cable between motor
control board and motor control
interface boards
Check the continuity of the ribbon
cables between the motor control
interface boards and the motor
control board. If there is no
continuity, replace the ribbon cable.
Failed motor control board or motor
control interface boards Disconnect the ribbon cable from a
motor control interface board and
measure the voltage on the ribbon
cable between positions 16 and 10. If
the voltage is 1.0–2.0 VDC, replace
the motor control interface board. If
the voltage is outside 1.0–2.0 VDC,
replace the motor control board.
Pump or Motor Not Working
(contd)
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