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What This Guide Helps With
Alarm: Device check failed indicating unsuccessful system self-test, preventing safe ventilator operation and use on a patient.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
- Remove the ventilator from patient use immediately if this alarm is present
- Provide alternate ventilation using a backup ventilator or bag-valve mask
- Confirm patient remains safely ventilated
2. Verify the Reported Alarm and Behavior
- Power on the ventilator and confirm the alarm message: Device check failed
- Observe when the failure occurs (startup, during device check, after configuration change)
- Check if the device check completes partially or fails immediately
- Look for additional error messages or failed test indicators
3. Check Power Source and Stability
- Confirm AC power cable is securely connected
- Test outlet with known-good equipment
- Avoid running device check on battery power if possible
4. Inspect External Connections and Accessories
- Remove and reconnect breathing circuit
- Disconnect unnecessary accessories or modules
- Inspect connectors for damage or contamination
5. Check for Obvious Physical Issues
- Inspect for signs of damage, liquid ingress, or contamination
- Listen for abnormal sounds during startup (fans, valves, clicks)
6. Rerun the Device Check
- Follow on-screen prompts to rerun device check
- Ensure proper setup with correct circuit and stable conditions
7. Isolate Repeat Failure
- Repeat test with minimal configuration (no accessories)
- Attempt test with a different known-good circuit
- Determine if failure persists regardless of setup
If the Problem Persists
If the Device check failed alarm continues after rerunning tests and verifying external factors:
- External causes have been ruled out
- This strongly indicates an internal system failure (hardware, sensors, or control system)
- Remove the ventilator from service
- Label Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot on an active patient. Move the patient to a backup device first before continuing troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Ventilator displayed Device check failed during startup and could not be used."
Cause
What was observed during troubleshooting.
Example:
"Device failed internal POST/system test with no external issues found."
Resolution
What action was taken.
Example:
"Reran device check with known-good setup; failure persisted. Removed 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
A failed device check is a critical indicator that the ventilator cannot confirm safe operation. Always prioritize patient safety, verify simple causes first, and escalate appropriately when internal failure is indicated. Proper documentation ensures clear communication and continuity of care.
That is successful troubleshooting.