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Manufacturer
Model
What This Guide Helps With
Alarm: Too Long In Evacuation indicating failure to reach required vacuum level, impacting sterilization cycle completion and proper air removal.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove sterilizer from active use if alarm persists during a cycle
- Do not rely on incomplete sterilization loads
Verify the Reported Alarm and Behavior
- Confirm “Too Long In Evacuation” alarm is displayed
- Observe when it occurs during evacuation phase
- Check if cycle pauses, extends, or attempts to continue
Check Water Supply
- Verify water supply valve is open
- Confirm facility water pressure is at least 30 PSIG
Inspect Chamber Drain Strainer
- Locate and inspect the chamber drain strainer
- Remove debris and clean thoroughly if clogged
Check Door Seal Function
- Inspect door gasket for proper inflation and activation
- Check for damage or wear
- Verify seal steam and exhaust connections are intact
Inspect for External Leaks
- Check chamber plumbing, hoses, and fittings for leaks
- Inspect door interface sealing
- Run leak test if available
Evaluate Valves (Non-Invasive Checks)
- Listen for proper actuation of check valves and solenoid valves
- Look for sticking, delayed response, or no actuation sound
Attempt Cycle Again
- Restart sterilization cycle after corrections
- Verify evacuation completes without alarm
If the Problem Persists
If alarm continues after external causes have been ruled out (water supply, drain, seal, leaks):
- Remove device from service
- Label as Out of Service
- Send for qualified repair or bench evaluation
Clinical Use Tip
Never troubleshoot on an active patient. Always move instruments and workflow to a properly functioning sterilizer before continuing.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterilizer displaying 'Too Long In Evacuation' alarm and unable to complete cycle."
Cause
What was observed during troubleshooting.
Example:
"Chamber drain strainer partially clogged restricting evacuation flow."
Resolution
What action was taken.
Example:
"Cleaned drain strainer, verified water pressure, and confirmed normal operation on test cycle."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Evacuation alarms directly impact sterilization effectiveness. Always verify water supply, drainage, and sealing before suspecting internal failures. Escalate appropriately when external causes are ruled out to maintain safety and reliability.
That is successful troubleshooting.