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What This Guide Helps With
Alarm: Exhaust Rate Too Slow causing delayed chamber pressure release during liquid cycle and prolonged cooling and exhaust time, potentially impacting sterilization quality and load safety.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Do not use the sterilizer for processing loads until the alarm condition is resolved
- If a cycle is in progress, allow it to complete safely if the unit is attempting recovery
- Do not release loads from a questionable cycle
Verify the Reported Alarm and Behavior
- Confirm “Exhaust Rate Too Slow” is displayed
- Observe when the alarm occurs (typically during liquid cycle exhaust phase)
- Note extended exhaust time or slow pressure drop
Check Drain Line and Facility Drain Flow
- Inspect drain line for kinks, restrictions, or blockage
- Verify facility drain is functioning properly
Check for Condensate or Steam Backup
- Observe for pooling condensate or slow drainage
- Confirm normal steam discharge behavior
Confirm Correct Cycle Selection
- Verify that a liquid cycle is being used for the load
- Ensure settings match intended processing requirements
Evaluate Exhaust Solenoid Valves (S40 / S03)
- Listen for proper actuation during exhaust phase
- Check for delayed or inconsistent operation
Check Chamber Steam Trap Function
- Look for signs of poor condensate removal
- Identify inconsistent exhaust or pressure behavior
Assess Control and Calibration
- Consider control drift if no mechanical issue is found
- Verify system maintains proper exhaust rate automatically
If the Problem Persists
If external restrictions and simple causes have been ruled out:
- Remove the device from service
- Label the unit Out of Service
- Escalate for qualified repair and calibration
Clinical Use Tip
Never troubleshoot or rely on a sterilizer during active patient use. Always move processing to a backup sterilizer before addressing alarm conditions.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterilizer displaying Exhaust Rate Too Slow alarm during liquid cycle with prolonged exhaust phase."
Cause
What was observed during troubleshooting.
Example:
"Restricted exhaust flow suspected due to partial blockage or malfunctioning solenoid valve."
Resolution
What action was taken.
Example:
"Verified drain line, identified abnormal exhaust behavior, removed unit from service, and escalated for repair and calibration."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Exhaust-related alarms directly affect sterilization quality and safety. Always begin with external flow checks before moving to component evaluation. Escalate appropriately when system performance is compromised.
That is successful troubleshooting.