On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Troubleshooting self-test failure during power-on, typically caused by battery, PAD-Pak, electrode, or environmental issues preventing the AED from entering ready status.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- If the AED was expected to be used clinically, immediately obtain another working AED.
- Do not rely on a device that has failed self-test.
Expected: Patient care continues safely with a functional device
Why it matters: A failed self-test means the AED cannot guarantee shock delivery
Verify the Self-Test Failure Indication
- Power on the AED and observe indicators:
- Audible tones or voice prompts
- Status indicator (flashing green vs red/no light)
- Any visible error indicators
Expected: Failure is clearly indicated (no ready status or error alert)
Why it matters: Confirms this is a true failure, not a misinterpretation
Check PAD-Pak Installation (Most Common Cause)
- Remove and reseat the PAD-Pak cartridge.
- Ensure it clicks fully into place
- Inspect for damage or improper seating
Expected: AED recognizes PAD-Pak and may pass self-test after reseating
Why it matters: Improper installation prevents the device from completing checks
Check PAD-Pak Expiration and Type
- Verify the PAD-Pak:
- Not expired
- Correct type (adult vs pediatric)
- Replace with a known-good, in-date PAD-Pak if questionable.
Expected: Device completes self-test with a valid PAD-Pak
Why it matters: Expired or incompatible PAD-Paks will trigger failure
Inspect Electrode Connection (If Applicable)
- Ensure electrode leads (integrated with PAD-Pak) are intact:
- No visible cuts, kinks, or damage
- Fully connected internally (no loose housing)
Expected: No physical defects in electrode system
Why it matters: AED checks electrode integrity during self-test
Check for Environmental Conditions
- Assess storage and operating environment:
- Excessive heat or cold
- Moisture exposure
- Condensation
- Allow the device to stabilize at room temperature if needed.
Expected: Device operates within normal environmental range
Why it matters: Extreme conditions can cause temporary self-test failures
Power Cycle the AED
- Turn the device off (if applicable) and back on.
- Observe if the self-test re-runs and passes.
Expected: Device may recover from a transient fault
Why it matters: Clears temporary logic or sensor errors
Swap with Known Good PAD-Pak (Definitive External Test)
- Install a confirmed working PAD-Pak.
Expected:
- If issue resolves → original PAD-Pak was faulty
- If issue persists → likely device issue
Why it matters: This isolates the most common external failure point
If the Problem Persists
If all external causes have been ruled out, the failure is likely internal (capacitor, internal circuitry, or system diagnostics failure).
Remove the AED from service
Label as Out of Service
Send for repair or bench evaluation
Knowing when to stop prevents unnecessary risk and wasted time.
Clinical Use Tip
Never troubleshoot or attempt to validate an AED during an active patient emergency. Always switch to a known working AED first, then troubleshoot afterward.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"AED failed self-test on power-on and did not show ready status."
Cause
What was observed during troubleshooting.
Example:
"Failed PAD-Pak identified during troubleshooting."
Resolution
What action was taken.
Example:
"Replaced PAD-Pak with in-date unit; AED passed self-test and returned to service."
Helpful Details to Include (If Known)
- Status indicator behavior (green flashing, red, or none)
- PAD-Pak expiration date checked
- PAD-Pak swapped with known good
- Audible tones or voice prompts noted
- Environmental conditions assessed
- Final device status (in service or removed)
Final Thought
Self-test failures on AEDs must be taken seriously, as they directly impact life-saving functionality. Focus on simple external causes first—especially the PAD-Pak—then escalate appropriately. Clear documentation ensures reliability tracking and patient safety.
That is successful troubleshooting.