Nordson ProBlue Flex - Fill System Troubleshooting Table

Troubleshooting
6-30
Part 1128350_02
E 2020 Nordson Corporation
Fill System Troubleshooting Table
Problem Possible Cause Corrective Action
1. System overfilled
Level sensor out of calibration
Calibrate the level sensor at application
temperature with the melter empty.
Level sensor ground wires loose or
disconnected
Connect the level sensor cable ground
wires or replace the level sensor cable.
Level sensor cable loose or
disconnected
Check the level sensor cable connections.
Level sensor failure Replace the level sensor board.
Fill board failed Replace the low-voltage controller board.
Adhesive bin solenoid valve stuck open
Clean or replace the solenoid valve.
2. System underfilled
Too little adhesive in b in Add adhesive to the bin.
No power Connect power.
Fill system power cable loose Make sure the transfer hose and/or
sequencer solenoid cable is securely
connected to the melter, sequencer, and
adhesive bin.
Inadequate air supply Check the air s upply by comparing the
following pressure gauge readings:
S When air is not flowing (static) to
the pump and vibrator
S When air is flowing (dynamic) to
the pump and vibrator
Makesurethedifferencebetweenthetwo
readings does not exceed 0.7 bar (10 psi).
No or low air pressure Check the air supply to the adhesive bin.
Air pressure regulator failed Replace the regulator.
Fill Time Limit too short Adjust the Fill Time Limit setting.
Foreign material or incorrect adhesive
in bin
Inspect the adhesive in the bin for
contamination.
Adhesive bridging in bin Dislodge the adhesive.
Vibrator failed Replace the vibrator.
Adhesive transfer hose blocked Disconnecttheadhesivetransferhose
from the adhesive bin and clear the
blockage from the pump. Refer to
Maintenance (Section 5).
Adhesive bin solenoid valve failed Clean or replace the solenoid valve.
Refill PCA failed Replace the refill PCA.
Level sensor out of calibration Calibrate the level sensor at application
temperature with the melter empty.