Chapter 6
Troubleshooting
ITW Dynatec
UFD Applicator, Manual 40-43, Rev. 6.16
Page 51
Chapter 6
Troubleshooting
Troubleshooting In General
ADVICES:
Please re-read all security advices given in Chapter 2 before troubleshooting.
All troubleshooting or repair procedures must be performed by qualified, trained
technicians.
The temperatures measured on the outer surface may deviate significantly from the
temperatures set and displayed. This can lead to a false conclusion (e.g. defective heating).
Such a difference is normal and depends also largely on the materials used.
In general:
If failure occurs, check first:
•
Check all the electrical and pneumatic connections.
•
Verify that the main power switch of the unit is ON.
•
Verify that the pump is functioning and the Applicator has the required air pressure.
•
Verify that the temperature controller is in operation and that the setpoints are correct for
the Melter, Heated Hoses, Applicator and all other components connected to the unit.
•
Check to see if all components are heating properly.
Troubleshooting Guide UFD Applicator
Problem
Possible Cause
Solution
Module does not open.
1. Temperature adjustment
of head is too low.
2. Solenoid defective.
1. Check temperature
adjustment.
2. Push the solenoid’s manual
button. If it opens, the problem
is electrical. Check and/or
replace the solenoid.
No adhesive flowing out of
module.
1. Nozzle is clogged.
2. Filter element is dirty.
3. Module seals (O-rings) are
defective.
4. ASU’s hopper is empty.
5. Adhesive is too cold.
6. Solenoid valve is not
opening.
7. Piston stroke is too low.
1. Clean or replace nozzle.
2. Replace filter, see instructions
in Ch. Maintenance.
3. Check module O-rings, see
instructions in Ch.
Maintenance.
4. Re-fill hopper.
5. Adjust temperature, see ASU
manual.
6. Check solenoid valve.
7. Adjust the stroke limit, see
instructions in Ch.
Maintenance.
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