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What This Guide Helps With
This guide addresses the Alarm: ADC Failure condition, which causes the sterilizer to abort cycles due to loss of accurate sensor signal processing. This prevents safe and reliable sterilization operation.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
- Remove the sterilizer from service immediately if the alarm occurs
- Do not use instruments from an aborted cycle
- Transfer sterilization needs to another unit
2. Verify the Reported Alarm and Behavior
- Confirm “ADC Failure” is displayed on the screen
- Observe if the cycle automatically aborts
- Note if the alarm occurs at startup or during a cycle
- Check for missing, unstable, or invalid temperature/pressure readings
3. Check Power Stability and Input Source
- Verify the unit is connected to a stable power source
- Check for recent power interruptions or fluctuations
- Confirm facility power is consistent
4. Inspect External Connections to Control System
- Power down the unit if safe to do so
- Inspect accessible control cabinet connections
- Check harness connections leading to control boards
- Reseat any loose or partially connected cables
5. Check for Signs of Environmental or Physical Damage
- Inspect for moisture intrusion in control areas
- Look for corrosion on connectors
- Check for burn marks or unusual odors
6. Power Cycle the Unit
- Restore power and restart the sterilizer
- Observe if the alarm clears or immediately returns
7. Determine if Issue Persists
- If the ADC Failure alarm returns consistently, external causes have been ruled out
- Failure is likely internal to the control system
If the Problem Persists
Persistent ADC Failure alarms indicate failure of the Analog-to-Digital circuitry or the main control board.
- Remove the sterilizer from service
- Label the unit Out of Service
- Send for qualified repair or board-level replacement
Clinical Use Tip
Never troubleshoot or attempt resets while a load is in process. Always transfer sterilization needs to another unit before taking this device offline.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit displayed ADC Failure alarm and aborted cycle during operation."
Cause
What was observed during troubleshooting.
Example:
"Internal failure of analog-to-digital circuitry suspected after verifying stable power and secure connections."
Resolution
What action was taken.
Example:
"Verified alarm, checked power and connections, power cycled unit. Alarm persisted. Removed unit from service and sent for repair."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
ADC Failure alarms indicate a loss of critical sensor signal processing. Since accurate readings are essential for sterilization safety, escalation to qualified repair is the correct action once external checks are complete.
That is successful troubleshooting.