What causes fault code PKG-LABEL1 (Label Applicator — Missing Label / No Label Detected)?

Label roll empty — no more labels on the roll. Label peeled from liner but did not transfer to product — vacuum pad failed to hold label. Label applicator air cylinder did not fire — compressed air supply low or solenoid fault. Label printer ran out of ribbon — thermal transfer ribbon depleted. Product was not in position when label was applied — timing/sensor issue

How do I fix fault code PKG-LABEL1?

Check label roll — load a new roll if empty, thread through the printer and peel bar. Check thermal transfer ribbon supply — load new ribbon if depleted. Verify compressed air supply to the applicator — should be 60-80 PSI at the regulator. Check vacuum pad and tamp cylinder operation — manually trigger a label apply cycle. Clean the missing label verification sensor — typically a retro-reflective photo-eye after the apply point. Verify product triggering sensor — product must be in the correct position before the apply signal fires

Label Applicator — Missing Label / No Label Detected

PKG-LABEL1

Print-and-apply label applicator failed to apply a label to the product or case. Missing label sensor did not detect a label on the product after application.

medium packaging

packaging label applicator print apply vacuum tamp

Probable Causes (ranked)

Label roll empty — no more labels on the roll
Label peeled from liner but did not transfer to product — vacuum pad failed to hold label
Label applicator air cylinder did not fire — compressed air supply low or solenoid fault
Label printer ran out of ribbon — thermal transfer ribbon depleted
Product was not in position when label was applied — timing/sensor issue

Fix Steps

1 Check label roll — load a new roll if empty, thread through the printer and peel bar
2 Check thermal transfer ribbon supply — load new ribbon if depleted
3 Verify compressed air supply to the applicator — should be 60-80 PSI at the regulator
4 Check vacuum pad and tamp cylinder operation — manually trigger a label apply cycle
5 Clean the missing label verification sensor — typically a retro-reflective photo-eye after the apply point
6 Verify product triggering sensor — product must be in the correct position before the apply signal fires

Field Trick

When a label applicator starts missing every 5th or 10th label, the problem is usually the label peeling angle at the peel bar. The peel bar angle must be sharp enough (150-170 degrees) that the label separates from the liner cleanly. If the bar has been bumped or shifted, re-adjust it by 5 degrees and the miss rate drops to zero.

Suggested Replacement Parts

Parts matched to fault category: Label Printer

Zebra ZT411 Industrial Label Printer P/N: ZT41142-T010000Z 203 dpi, 4 inch wide, thermal transfer, USB/Ethernet/Serial

Amazon $1250.00 Grainger $1400.00

Prices are estimates. Verify part numbers match your equipment before ordering.

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