On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Troubleshoot accepted bottle identification followed by drawer, rack, bottle-position, or transport jamming caused by obstruction, loading, alignment, or mechanical-access issues.
Step-by-Step Troubleshooting
1. Protect Specimens and Maintain Testing Continuity
Do not continue repeatedly cycling a jammed drawer or transport mechanism with patient specimens loaded. Follow laboratory procedure to preserve specimen integrity and move testing to another verified analyzer when necessary.
If a bottle is trapped, do not force the drawer, rack, or bottle free if resistance is abnormal.
Expected outcome: Specimens are protected, an alternate testing workflow is available if needed, and troubleshooting can proceed without risking bottle breakage or delayed testing.
2. Confirm the Exact Reported Condition
Ask laboratory staff what occurred immediately before the jam. Determine whether:
- The barcode was read successfully.
- The problem affects one bottle, one rack or drawer position, or multiple positions.
- The mechanism begins moving and then stops.
- The same position repeatedly causes the problem.
- Any bottle was manually repositioned before the fault.
- Any spill, broken bottle, or foreign object was recently reported.
Observe the condition without repeatedly commanding movement.
Expected outcome: The problem is narrowed to a specific position, loading condition, or repeatable transport action. If the issue cannot be reproduced and normal operation verifies successfully, troubleshooting can stop after documentation.
3. Inspect the Bottle and Loading Condition
Remove the affected bottle only when it can be removed safely through normal access. Inspect for:
- Incorrect bottle type for the configured workflow.
- Damaged, cracked, swollen, or contaminated bottle.
- Loose labels or additional labels extending beyond the bottle surface.
- Barcode labels that have folded or lifted despite successful scanning.
- Caps, tape, or other material interfering with normal bottle clearance.
Compare the bottle with a known-good bottle.
Expected outcome: The bottle is physically suitable for normal loading and has no protruding material that could catch during transport. If correcting the bottle condition restores normal operation, troubleshooting can stop after verification.
4. Inspect the Drawer, Rack, and Accessible Travel Path
With the instrument placed in an appropriate safe state, visually inspect accessible areas for:
- Mispositioned bottles.
- Loose labels or paper.
- Broken plastic.
- Bottle fragments.
- Dried contamination or debris.
- Objects preventing full drawer or rack travel.
- A rack or carrier that is not fully seated.
Do not reach into powered moving mechanisms or bypass guards or interlocks.
Expected outcome: The accessible travel path is clear and the rack or drawer is seated normally. If removal of an obvious obstruction restores reliable operation, proceed to final verification.
5. Check for Position-Specific Mechanical Interference
Compare the affected rack or drawer position with adjacent normal positions. Look for externally visible:
- Bent guides.
- Damaged bottle retainers.
- Misaligned rack components.
- Unusual resistance during permitted manual loading or unloading.
- Loose removable accessories.
Do not straighten, adjust, or disassemble internal robotic components unless specifically permitted by approved service documentation.
Expected outcome: No visible position-specific damage or interference is present. A damaged position or carrier warrants removal from service or approved replacement rather than repeated operation.
6. Perform a Controlled Test With a Known-Good Bottle
If permitted by laboratory workflow and service procedure, test the affected position using an appropriate known-good bottle or approved test item.
Observe whether:
- Barcode acceptance occurs normally.
- The drawer or rack moves smoothly.
- The bottle reaches its intended position.
- The mechanism completes the loading sequence without hesitation or abnormal sound.
Expected outcome: A known-good item loads normally. If the fault follows the original bottle, the bottle or its labeling/loading condition was the likely cause and troubleshooting can stop after verification.
7. Compare Other Positions
Test another permitted drawer, rack, or bottle position.
A fault isolated to one position suggests a local mechanical, sensing, or alignment problem. A fault across multiple positions suggests a broader transport, control, or mechanism problem.
Expected outcome: Normal positions operate consistently. If all positions now operate correctly and the original obstruction or loading issue has been corrected, troubleshooting can stop.
8. Check for Abnormal Noise or Repeated Motion
Observe one controlled cycle. Stop testing if there is:
- Grinding.
- Repeated impact.
- Clicking associated with stalled movement.
- Repeated unsuccessful positioning.
- Visible mechanical distortion.
- Evidence that a bottle could break.
Do not continue cycling the mechanism to obtain additional evidence.
Expected outcome: The mechanism moves smoothly without abnormal sound or repeated impact. Abnormal mechanical behavior requires escalation.
9. Perform Final Functional Verification
After correcting an external cause, verify normal operation through the complete permitted loading sequence.
Confirm that:
- The barcode is accepted.
- The drawer or rack moves without binding.
- The bottle reaches the proper position.
- The system recognizes the bottle as loaded.
- No new transport or position fault appears.
Expected outcome: The complete loading sequence operates normally. Troubleshooting can stop and the device can be returned to service according to facility procedure.
10. Escalate if the Jam Persists
If the same position continues to jam after bottles, labels, obstructions, rack seating, and accessible external conditions have been checked, stop external troubleshooting.
Expected outcome: A persistent mechanical or position-specific problem is escalated without forcing or repeatedly cycling the mechanism.
If the Problem Persists
Common external causes have been ruled out. The remaining problem may involve a position sensor, robotic transport mechanism, alignment condition, drive component, internal obstruction, or service-level control issue.
The affected instrument should be:
- Removed from service when reliable specimen handling cannot be assured.
- Labeled Out of Service.
- Sent for repair or bench evaluation as appropriate.
- Evaluated using current manufacturer documentation and approved test equipment.
- Repaired or adjusted only by qualified personnel.
Do not perform deep disassembly, bypass guards, or force the robotic mechanism. Return to service only after reliable bottle loading, positioning, identification, and normal system operation have been verified.
Knowing when to stop external troubleshooting and escalate a persistent robotic fault is proper troubleshooting.
Clinical Use Tip
Protect blood culture bottles from breakage and processing delay; move specimens to an alternate verified testing pathway before troubleshooting an unreliable transport mechanism.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory staff reported that a blood culture bottle barcode was accepted, but the bottle repeatedly jammed while loading into one rack position."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found a loose secondary label extending from the bottle and catching on the rack guide during movement."
Resolution
What action was taken.
Example:
"Removed the interfering label, verified the bottle surface was clear, and successfully tested repeated bottle loading and positioning without further jamming."
Helpful Details to Include (If Known)
- Exact drawer or rack position affected
- Whether the barcode was accepted
- Bottle type and physical condition
- Label condition
- Whether one or multiple positions were affected
- Debris or obstruction found
- Rack or carrier condition
- Known-good bottle test result
- Abnormal sound or movement observed
- Results before and after correction
- Final device status
Final Thought
Protect specimens first, then work from bottle condition and accessible obstructions toward position-specific mechanical causes. Verify normal transport before assuming an internal failure, escalate persistent jamming appropriately, and document the exact complaint, cause, correction, and final test.
That is successful troubleshooting.