On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide helps troubleshoot the “Ambient pressure sensor?” alarm, which indicates inaccurate or unreliable ambient pressure readings that can affect ventilation accuracy, calibration, and device checks.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Immediately assess the patient
- Transfer the patient to a backup ventilator before troubleshooting
- Confirm continuous safe ventilation
Verify the Reported Alarm and Behavior
- Confirm the “Ambient pressure sensor?” alarm is displayed
- Observe when the alarm occurs (startup, during use, or during system check)
- Check for failed device checks or calibration errors
Check Altitude Setting (Most Common Cause)
- Navigate to system configuration/settings
- Verify altitude or environmental pressure setting matches facility location
- Adjust if incorrect
- Restart or rerun device check
Perform Device/System Check
- Run full system self-test
- Observe for pass/fail related to pressure systems
- Note any additional pressure-related errors
Inspect Environmental Conditions
- Ensure ventilator is not exposed to extreme temperature
- Avoid rapid environmental pressure changes
- Allow device time to stabilize in the room
Power Cycle the Ventilator
- Power off completely
- Wait 30–60 seconds
- Power back on and monitor for alarm recurrence
Isolate as Internal Sensor Failure
- Confirm altitude setting is correct
- Alarm persists after system check and restart
- No environmental or external causes identified
- Determine likely ambient pressure sensor failure
If the Problem Persists
If all external configuration and environmental causes have been ruled out, the issue is likely an internal sensor failure.
- Remove the ventilator from service
- Label the device Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot a ventilator on an active patient. Always move the patient to a backup device before investigating alarms to ensure safe and uninterrupted ventilation.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Ventilator displaying ‘Ambient pressure sensor?’ alarm during startup and failing device check."
Cause
What was observed during troubleshooting.
Example:
"Altitude setting verified correct; alarm persisted after power cycle and system test, indicating likely ambient pressure sensor failure."
Resolution
What action was taken.
Example:
"Removed ventilator from service, labeled Out of Service, and sent 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
Ambient pressure sensor issues directly affect how the ventilator interprets and delivers pressure. Always verify configuration first, but escalate quickly if accuracy cannot be confirmed.
That is successful troubleshooting.