PatternPro Variable Pitch Guns.pdf - 第37页
33 P/N 1048257_03 2018 Nordson Corporation PatternPro Edition 02/18 Troubleshooting Table (contd) Table 5 Troublehooting Table (contd) Problem Possible Cause Corrective Action 5. Modules not triggering at the same time…
32
P/N 1048257_03
2018 Nordson Corporation
PatternPro
Edition 02/18
Troubleshooting Table (contd)
Table 5 Troublehooting Table
(contd)
Problem Possible Cause Corrective Action
1. No adhesive flow
from a single‐ module
applicator or from any
module of a
multi‐module
applicator
(contd.)
Adhesive in air section of
module
Replace the O‐rings. Refer to Replacing the
Rotating Disk and applicator Module in Repair.
Module failed Replace the module. Refer to Replacing the
Rotating Disk and applicator Module in Repair.
Dirty or faulty triggering device Clean or replace the triggering device. Refer to
DP1.
Faulty encoder Test the encoder and replace if defective.
2. No adhesive flow
from some modules
in a multi‐module
applicator
Nozzle clogged Check the nozzle. Refer to DP2.
Module failed Replace the module. Refer to Replacing the
Rotating Disk and applicator Module in Repair.
3. Uncontrolled
adhesive flow from
module
Hydraulic pressure too high Decrease the system hydraulic pressure.
Hydraulic pressure too high
and applicator air pressure
lost (MiniBlue ll applicator
only)
Stop the melter pump and restore the air
pressure to the applicator.
Module failed open Replace the module. Refer to Replacing the
Rotating Disk and applicator Module in Repair.
Solenoid valve ported to
applicator body backwards or
failed open
Correct the solenoid valve porting or replace
the solenoid valve. Refer to Connecting the
Solenoid Valve.
4. Adhesive leaking
out of the disk
cavity
Damaged O‐rings Replace the O‐ring. Refer to Replacing the
Rotating Disk and applicator Module in Repair.
33
P/N 1048257_03
2018 Nordson Corporation
PatternPro
Edition 02/18
Troubleshooting Table (contd)
Table 5 Troublehooting Table
(contd)
Problem Possible Cause Corrective Action
5. Modules not
triggering at the
same time on
multi‐module
applicator
Applicator module adjustment
screw not properly set (all
applicators except MiniBluell)
Contact Nordson technical support.
Module failed Replace the O‐ring. Refer to Replacing the
Rotating Disk and applicator Module in Repair.
Insufficient applicator air
pressure
Increase the applicator air pressure.
6. Applicator fails to
heat or underheats
No power Check that the melter is on. Refer to the melter
manual.
Applicator temperature setting
too low
Adjust the temperature setting. Refer to the
melter manual.
Applicator heater failed (open
or short)
Check for an open heater circuit. Refer to DP4.
Applicator RTD failed (open or
short)
Check the RTD resistance. Refer to DP4.
7. Applicator
overheats
Melter, hose, or applicator
temperature setting too high
Adjust the setting. Refer to the melter manual.
Applicator RTD shorted
(melter should shut down)
Check the RTD resistance. Refer to DP4.
Short in heater control circuit Troubleshoot the melter. Refer to the melter
manual.
34
P/N 1048257_03
2018 Nordson Corporation
PatternPro
Edition 02/18
Diagnostic Procedures (DPs)
The following diagnostic procedures (DPs) are referenced in the
Troubleshooting Table.
DP1. Check a Solenoid Valve
1. Place the system into operation.
2. Trigger the applicator using the timer or pattern controller:
Hot melt material flows—normal indication. Return to the
Troubleshooting Table.
Hot melt material does not flow—go to step 3.
3. Manually trigger the applicator at the solenoid valve:
Hot melt material flows—normal indication. Return to the
Troubleshooting Table.
Hot melt material does not flow—go to step 4.
4. Check the solenoid valve coil for continuity:
Continuity okay—normal indication. Return to the Troubleshooting
Table.
No continuity—failed solenoid valve. Replace the solenoid valve.
Refer to Connecting the Solenoid Valve.
NOTE: Verify that the solenoid valve being used has a rated service
temperature above 85 C (185 F).