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Asset Type
Manufacturer
Model
What This Guide Helps With
Alarm: NO AIR SUPPLY indicating loss of compressed air, causing inability to deliver breaths or maintain proper ventilation.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Immediately assess the patient
- Provide alternate ventilation (bag valve mask or backup ventilator) if needed
- Confirm adequate ventilation is maintained
Verify the Reported Alarm and Behavior
- Confirm NO AIR SUPPLY alarm is displayed
- Observe for loss of airflow or pressure delivery
- Note if alarm occurs at startup or during operation
- Check for audible alarm and ventilation interruption
Check Facility Air Supply Connection
- Ensure air hose is securely connected to wall outlet
- Verify outlet is active using gauge or another device
- Confirm correct gas source (AIR, not O2)
Check Air Hose and Fittings
- Inspect hose for kinks, disconnections, or damage
- Reseat both ends of the hose
- Swap with a known-good hose if available
Check Air Inlet Filter
- Inspect for blockage or contamination
- Clean or replace if dirty
Verify Internal Compressor Function (if equipped)
- Listen for compressor operation
- Confirm unit configuration supports compressor use
Check Pressure Switch Connections
- Ensure accessible connectors are properly seated
- Do not open the unit
Run Extended Self Test (EST)
- Perform full EST per manufacturer procedure
- Observe for air supply or pressure-related failures
If the Problem Persists
If the alarm continues after all external checks, internal compressor failure, pressure regulation issues, or sensor faults are likely.
- Remove device from service
- Label Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot air supply issues while connected to a patient. Always transition to a backup ventilator before investigating.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Ventilator alarming NO AIR SUPPLY, unable to deliver breaths during use"
Cause
What was observed during troubleshooting.
Example:
"Disconnected air hose at wall outlet causing loss of air supply"
Resolution
What action was taken.
Example:
"Reconnected air hose, verified wall air supply, and confirmed normal ventilator operation"
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Air supply alarms should always be treated as critical failures. Begin with external checks such as connections and hoses, but escalate quickly if the issue persists. Patient safety and timely escalation are essential.
That is successful troubleshooting.