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What This Guide Helps With
Troubleshoots failed verification, calibration-related, sensor-check, or service test conditions without changing restricted calibration parameters or entering unauthorized service functions.
Step-by-Step Troubleshooting
1. Protect Specimens and Remove the Processor From Active Workflow
Do not perform calibration, verification, or service testing while specimens depend on the processor unless specifically permitted by approved procedures.
Transfer pending work to another verified processing workflow when necessary.
Expected outcome: No specimens are placed at risk during technical evaluation.
2. Confirm What “Calibration” Means in the Reported Event
Determine exactly what procedure failed. Laboratory staff may use “calibration” to describe a system check, verification routine, sensor test, startup check, or other maintenance function.
Record the exact test name and displayed message without assuming a specific calibration procedure.
Expected outcome: The actual failed procedure is identified.
3. Verify Normal Startup and Ready Status
Before troubleshooting a calibration-related complaint, confirm that the processor powers on normally and is not already reporting unrelated power, fluidics, temperature, pressure, reagent, or communication problems.
Expected outcome: The processor is otherwise operational, or a more fundamental fault is identified that should be corrected first.
4. Check External Conditions Required for the Procedure
Inspect accessible reagent containers, waste connections, processing components, covers, lids, and other external items required for normal operation.
Confirm there are no obvious leaks, empty required supplies, incorrectly positioned components, or open covers affecting the test.
Expected outcome: External prerequisites for the procedure are satisfied.
5. Confirm Correct Procedure Selection
Have authorized laboratory or service personnel verify that the intended approved procedure is being selected and that required setup conditions are met.
Do not access restricted service menus or change hidden calibration parameters.
Expected outcome: The proper authorized procedure is being performed under the correct setup conditions.
6. Review Recent Maintenance or Changes
Determine whether the failure began after reagent changes, cleaning, preventive maintenance, relocation, software work, component replacement, or a power interruption.
Inspect any externally accessible item disturbed during that work.
Expected outcome: A simple setup or connection problem related to recent activity is corrected, or recent changes are ruled out.
7. Repeat the Approved Check Once
If all prerequisites are correct, no specimens are at risk, and the procedure is approved for Clinical Engineering use, repeat the verification or calibration-related check once.
Do not repeatedly force a procedure that consistently fails.
Expected outcome: The procedure completes successfully. If it does, continue to final functional verification and stop troubleshooting.
8. Confirm the Failure Is Repeatable
If the same failure recurs, document the exact point of failure and any associated system message.
Avoid changing unrelated settings in an attempt to force a passing result.
Expected outcome: A reproducible service condition is documented for escalation.
9. Perform Final Functional Verification
If the procedure succeeds after correcting an external condition, verify normal system readiness and confirm that no related warnings remain.
Expected outcome: The processor completes the required check and is ready for normal operation.
If the Problem Persists
If setup conditions, consumables, accessible connections, normal readiness, approved procedure selection, and recent maintenance factors have been checked and the calibration-related procedure still fails, common external causes have been ruled out.
The remaining problem may involve internal sensing, temperature or pressure measurement, control systems, fluidics, software, internal communications, or service-level calibration requirements.
The device should be:
- Removed from service when required verification cannot be completed.
- Labeled Out of Service.
- Sent for repair or qualified service evaluation.
- Evaluated using appropriate Sakura Finetek service documentation and approved test equipment.
- Calibrated, repaired, or configured only by personnel authorized to perform those procedures.
Do not adjust calibration values merely to obtain a passing result. Required verification must be successfully completed before return to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Never return a tissue processor to clinical use solely because it appears to operate normally if a required verification or calibration-related test remains failed.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Laboratory staff reported that a required system verification would not complete successfully."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found that an externally accessible processing component was not fully seated after routine cleaning."
Resolution
What action was taken.
Example:
"The component was correctly reseated, the approved verification completed successfully, normal system readiness was confirmed, and the processor was returned to service."
Helpful Details to Include (If Known)
- Exact procedure or test that failed
- Exact displayed message
- Device ready status
- Specimen status
- Reagent and waste setup
- Cover and component positions
- Recent maintenance or cleaning
- Whether failure was repeatable
- Verification result after correction
- Final device status
Final Thought
Identify the actual failed procedure, confirm basic operating conditions before suspecting calibration hardware, never force a pass through unauthorized adjustments, and escalate repeatable failures with complete documentation.
That is successful troubleshooting.