ITW Dynatec
Chapter 6
Troubleshooting
Page 52
Apex Slot Die Applicator, Manual #40-47, Rev. 10.16
6.2 Troubleshooting Guide
NOTE:
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.
Preliminary Checks: Verify the following before proceeding
:
•
All pneumatic and electrical connections are correct.
•
The ASU is supplied with power and the main power switch is ON.
•
Adhesive is in the hopper and the ASU’s pump is ON.
•
The ASU and Applicator have sufficient air pressure.
•
The temperature controller is in operation. The setpoints are correct for the
application, ASU, Heated Hoses and Applicators. All components are heating
properly.
Problem
Possible Cause
Solution
Module does not open.
1. Temperature adjustment of
head is too low.
2. Inoperative solenoid valve.
1. Check temperature
adjustment.
2. Push the solenoid’s manual
button. If it opens, the problem
is electrical.
No adhesive flowing out of
module.
1. Die assembly is clogged.
2. Filter element is dirty.
3. Module seals (O-rings) are
inoperative.
4. ASU’s hopper is empty.
5. Adhesive is too cold.
6. Solenoid valve is not
opening.
1. Clean die assembly, see
instructions in Ch. 5
Maintenance.
2. Replace filter, see instructions
in Ch. 5 Maintenance.
3. Check module O-rings.
4. Re-fill hopper.
5. Adjust temperature, see ASU
manual.
6. Check solenoid vave.
Hot melt is coming out of the
module’s “weep” holes.
1. Module seals are
damaged.
1. Replace module.
Applicator does not reach
operating temperature.
1. Hopper temperature
setpoint is too low.
2. Inoperative heater
cartridge.
3. Inoperative temperature
sensor.
1. Change setpoint, see ASU
manual.
2. Check/ replace heater
cartridge.
3. Check/ replace sensor.
