Fill System Troubleshooting Table - Nordson ProBlue Flex Product Manual

Troubleshooting
6-30

Fill System Troubleshooting Table

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