On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting situations where the Tuttnauer 3870 sterilizer exhibits errors related to the control board or display communication. Symptoms may include unresponsive displays, error codes indicating communication faults, or intermittent operation. Most causes are external or easily verified before assuming internal board failure. This approach ensures patient safety and proper escalation when internal repair is needed.
Step-by-Step Troubleshooting
Verify Power Supply
- Ensure the sterilizer is plugged into a working outlet.
- Check for tripped breakers or blown fuses.
- Why: Inconsistent voltage can cause intermittent display or control board errors.
Inspect External Connections
- Check all harnesses and connectors between the display panel and main control board.
- Look for loose, damaged, or corroded pins.
- Why: Communication errors often stem from poor connections rather than board failure.
Check Display and Control Panel
- Ensure the display panel is seated properly and free of visible damage.
- Test buttons or touch functionality if applicable.
- Why: A malfunctioning panel may generate false communication error codes.
Power Cycle the Sterilizer
- Turn off the sterilizer, wait 1–2 minutes, and restart.
- Observe if the error persists during the boot sequence.
- Why: Some communication faults are temporary and can clear after a reset.
Swap Known-Good Components (If Available)
- If a spare display or cable exists, swap to isolate the faulty part.
- Why: Helps determine whether the fault is with the board, display, or cable.
Check for Environmental Interference
- Verify that the sterilizer is not near high electromagnetic interference (EMI) sources.
- Why: EMI can disrupt board-to-display communication.
If the Problem Persists
External causes have been ruled out. The control board or display may require internal evaluation or replacement.
- Remove the sterilizer from service.
- Label it “Out of Service.”
- Send for manufacturer-authorized repair or bench evaluation.
- Document steps taken before escalation to aid the service technician.
Clinical Use Tip
- Do not attempt cycles or sterilize instruments if communication errors are present.
- Move patient-critical loads to another sterilizer.
- Only troubleshoot when the sterilizer is empty and safe to handle.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Display panel unresponsive and error “COMM” appears during cycle.”
Cause
What was observed during troubleshooting.
Example:
“Observed loose connector between control board and display panel.”
Resolution
What action was taken.
Example:
“Reseated connector and power-cycled sterilizer; if error persists, unit sent for bench evaluation.”
Helpful Details to Include
- Outlet tested and verified
- All display and control panel connectors checked
- Power cycle attempted
- Any intermittent behavior noted
- Final device status: Out of Service if unresolved
Final Thought
Patient safety and infection control rely on accurate sterilizer function. Logical troubleshooting prioritizes external and easily verified issues first, reducing unnecessary risk and ensuring proper escalation. Thorough CCR documentation provides a clear record for future reference.
That is successful troubleshooting.