78 1100 Series WS MWS Reference Manual
3 Troubleshooting and Test Functions
Needle to Needle Seat Position
The needle failed to reach the end position in the needle seat.
The position of the needle is monitored by a position encoder on the needle
carrier. If the needle fails to reach the end point, or if the encoder fails to
recognize the needle carrier movement, the error message is generated.
Probable Causes
• Bad sample transport/sampling unit alignment
• Bent needle.
• Missing needle.
• Blocked seat.
• Defective position sensor in the needle carrier assembly.
• Defective MTP board.
Suggested Actions
✔ Do an auto-alignment
✔ Check and exchange the needle assembly if necessary.
✔ Clean or change the needle seat assembly if necessary.
✔ Exchange the needle carrier assembly.
✔ Exchange the sample transport assembly.
✔ Exchange the MTP board.
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