What causes fault code PAL-PDISP1 (Palletizer Pallet Dispenser — Empty Pallet Feed Fault)?

Pallet stack empty — forklift needs to load new stack of empty pallets. Pallet separator forks not engaging — hydraulic or pneumatic cylinders not firing. Pallet quality inconsistent — different sizes, broken stringers, or non-standard pallets mixed in the stack. Pallet dispenser photo-eyes blocked — not detecting pallet presence correctly. Dispenser conveyor or chain drive not advancing pallet to the palletizing station

How do I fix fault code PAL-PDISP1?

Check pallet supply — load a new stack of empty pallets. Verify all pallets in the stack are the same size and type — remove any oddballs. Check separator fork operation — manually trigger from PLC to verify cylinder extends and retracts. Inspect pallet dispenser photo-eyes — clean lenses and verify correct detection of single pallet. Check dispenser conveyor chain — verify it advances the pallet to the correct position. If double-feeding, inspect the pallet separator gap — adjust for the actual pallet deck thickness

Palletizer Pallet Dispenser — Empty Pallet Feed Fault

PAL-PDISP1

Empty pallet dispenser cannot reliably separate and feed single pallets to the palletizing station. Pallets are double-feeding, not separating, or not advancing.

medium palletizer

palletizer pallet dispenser empty pallet separator stack feed

Probable Causes (ranked)

Pallet stack empty — forklift needs to load new stack of empty pallets
Pallet separator forks not engaging — hydraulic or pneumatic cylinders not firing
Pallet quality inconsistent — different sizes, broken stringers, or non-standard pallets mixed in the stack
Pallet dispenser photo-eyes blocked — not detecting pallet presence correctly
Dispenser conveyor or chain drive not advancing pallet to the palletizing station

Fix Steps

1 Check pallet supply — load a new stack of empty pallets
2 Verify all pallets in the stack are the same size and type — remove any oddballs
3 Check separator fork operation — manually trigger from PLC to verify cylinder extends and retracts
4 Inspect pallet dispenser photo-eyes — clean lenses and verify correct detection of single pallet
5 Check dispenser conveyor chain — verify it advances the pallet to the correct position
6 If double-feeding, inspect the pallet separator gap — adjust for the actual pallet deck thickness

Field Trick

Pallet dispensers fail because of bad pallets. A stack of pallets with one broken stringer halfway down will jam the dispenser every time. Before loading a stack, kick the side of every pallet in the stack. If one shifts or flexes, pull it out. 5 seconds of inspection prevents 30 minutes of downtime.

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