48B0 - Accessor re-zero failed

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The re-zero operation of the robotic accessor failed. This could be caused by damage to the robotic accessor or end stops or failed electronics on the robotic accessor. This is sometimes accompanied by other errors. This fix procedure describes how to diagnose and fix the problem, and if needed, remove a stuck cartridge from a gripper.

Fix procedure

  1. Open the front door.
  2. Clear away any obstacles in the way of the robotic accessor such as a cartridge sticking out of a cell. If a cartridge is sticking out of a cell push it back in.
  3. If a cartridge is stuck between the gripper and a library slot, follow the Removing a stuck cartridge from gripper procedure.
  4. Inspect that there are no robotic accessor obstacles such as a cartridge sticking out of a cell. Other possible causes include debris in the Y-rail gear rack such as a piece of plastic, or other debris which would interfere with accessor motion.
  5. Manually move the grippers pickers and confirm no part is damaged and it moves freely. This can be done by moving the motor pulley with your fingers. Pay attention to the gripper fingers to ensure they are not damaged.
  6. Manually move the gripper assembly to left and right the entire X path by pulling on the X belt and confirm it moves freely.
  7. Manually move the robotic accessor up and down the entire library and confirm if moves freely.
  8. Check the Y axis cable connectors are well seated at both ends and confirm the cable is not damaged. If it is found damaged, replace it.
  9. Close the door.
  10. If the problem has been resolved, you are finished, otherwise continue with the next step.
  11. Replace the robotic accessor:
    1. Replace the robotic accessor using the Robotic Accessor videos.
  12. If the problem was solved you are done. Otherwise, contact IBM support.
Attention: If the problem has occurred multiple times and still not resolved, contact IBM support.

Damaged Components
During the procedure, if any part is found physically damaged, replace the applicable Customer Replacement Unit (CRU). See Customer service procedures.