ZOLL AED Plus

Pediatric Electrode Recognition Failure

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Asset Type

Defibrillator

Manufacturer

ZOLL

Model

AED Plus

What This Guide Helps With

Troubleshooting failure to recognize compatible Pedi-padz II electrodes or activate pediatric-specific ECG analysis and reduced-energy therapy.

Step-by-Step Troubleshooting

1. Ensure Patient Safety First

Do not perform extended electrode-recognition troubleshooting during an active pediatric emergency.

If the problem occurs during patient care:

Expected outcome: Patient care continues without depending on an AED with uncertain pediatric therapy settings.

Continue Clinical Engineering troubleshooting only after the AED Plus has been removed from active use.

2. Confirm That the AED Plus Supports Pedi-padz II

Inspect the AED Plus housing for the pediatric capability symbol identified by ZOLL.

Some earlier AED Plus units are not equipped for pediatric operation and will not function with Pedi-padz II electrodes. ZOLL states that units without the pediatric symbol require an upgrade before pediatric electrodes can be used.

Expected outcome: The AED Plus is confirmed as a pediatric-capable version.

If the pediatric symbol is absent, stop troubleshooting. Remove the device from pediatric service and contact ZOLL or an authorized service provider regarding upgrade eligibility.

3. Verify the Electrode Type

Confirm that the connected electrodes are genuine, compatible ZOLL Pedi-padz II pediatric electrodes.

Check the package and connector for:

Pedi-padz II are intended for pediatric patients younger than eight years or weighing less than 55 pounds, or 25 kilograms. The AED Plus should recognize these electrodes and change to pediatric ECG analysis and pediatric energy settings.

Expected outcome: The correct clinical pediatric electrodes are being used.

If incorrect or training electrodes are connected, replace them with an unopened compatible set and retest.

4. Inspect the Electrode Package

Check the Pedi-padz II package for:

Do not open a sealed clinical electrode package solely for routine troubleshooting unless permitted by facility policy. Use an approved test accessory or replacement set when available.

Expected outcome: The electrodes are within expiration and have no visible damage that could affect identification or electrical continuity.

If damage or expiration is found, replace the electrodes and stop if recognition is restored.

5. Inspect the AED Electrode Connector

With the AED removed from service and powered off, inspect the electrode connection area.

Look for:

Do not insert tools, probes, or cleaning materials into the connector contacts unless specifically approved by the manufacturer.

Expected outcome: The connector is clean, intact, and able to accept the electrode plug fully.

If physical damage is present, stop and send the AED for bench evaluation.

6. Reseat the Electrode Connector

Disconnect the electrode plug by holding the connector body rather than pulling on the cable.

Reconnect it firmly and evenly until it is fully seated. Confirm that the connector is not partially inserted or under tension from the electrode cable.

Power on the AED and observe the prompts and indicators.

Expected outcome: The AED recognizes the connected Pedi-padz II and operates using its pediatric-specific analysis and energy protocol.

If recognition returns, inspect the connection for intermittent movement and complete the required operational verification before returning the AED to service.

7. Check the Battery Condition

Review the AED readiness indicator and listen for battery or service-related prompts.

If battery condition is questionable:

A weak or unstable power source can interfere with startup, accessory detection, or completion of the self-test.

Expected outcome: The AED powers on normally without battery or readiness warnings.

If battery replacement corrects the recognition problem, complete an operational check and document the battery-related cause.

8. Test With a Known-Good Compatible Electrode Set

Using an approved test method, connect a known-good set of compatible Pedi-padz II electrodes.

Do not use an opened clinical set on a patient after it has been used for troubleshooting unless its instructions and facility policy specifically allow it.

Observe whether:

Expected outcome: The known-good electrode set is recognized consistently.

If the known-good set works, the original electrodes or their connector are defective. Replace the original set.

If neither set is recognized, the problem is likely associated with the AED connector, pediatric-recognition circuitry, software configuration, or another internal fault.

9. Perform the Approved Operational Check

After recognition is restored, complete the facility-approved AED Plus inspection or functional verification.

Confirm:

Do not perform a live shock test without the manufacturer-approved analyzer, simulator, load, and service procedure.

Expected outcome: The AED passes the complete operational check and remains stable.

If it passes all required testing, return it to service according to facility policy.

If the Problem Persists

If compatible, unexpired Pedi-padz II electrodes are fully connected, the batteries are acceptable, the AED has pediatric capability, and a known-good electrode set is still not recognized, common external causes have been ruled out.

The AED Plus should be:

The failure may involve the electrode receptacle, cable-detection circuit, pediatric identification circuitry, software, or another internal component.

Do not continue by opening the AED or attempting board-level repair without current manufacturer authorization, appropriate service information, and required test equipment. Knowing when to stop is proper troubleshooting.

Clinical Use Tip

Do not troubleshoot uncertain pediatric electrode recognition on an active patient. Move the patient to another verified defibrillator first. Pediatric electrodes must be correctly recognized because the AED Plus uses them to select pediatric-specific rhythm analysis and energy settings.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Clinical staff reported that the ZOLL AED Plus did not recognize connected Pedi-padz II pediatric electrodes."

Cause

What was observed during troubleshooting.

Example:
"Inspection found that the pediatric electrode connector was not fully seated, preventing reliable electrode identification."

Resolution

What action was taken.

Example:
"Reseated the Pedi-padz II connector, verified pediatric recognition with an approved test setup, completed the AED operational check, and returned the unit to service."

Helpful Details to Include (If Known)

Final Thought

Pediatric electrode-recognition failures must be handled as therapy-safety concerns. Start with compatibility, electrode condition, connection, and battery checks before suspecting an internal defect. Remove the AED from service when pediatric operation cannot be verified, and document the complaint, confirmed cause, testing performed, and final disposition clearly.

That is successful troubleshooting.

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