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What This Guide Helps With
Troubleshooting loss of platform power caused by battery, seating, external damage, control, or operating-condition problems before service-level escalation.
Step-by-Step Troubleshooting
1. Protect the Patient and Maintain CPR
Do not troubleshoot an unreliable AutoPulse while a patient depends on it. Immediately transition to high-quality manual CPR or another verified mechanical CPR device according to clinical protocol before evaluating the platform.
Expected outcome: Patient CPR continues without interruption while the suspect AutoPulse is removed from active patient support. If safe continuity of care is established, continue troubleshooting.
2. Confirm the Exact Power Failure
Determine whether the unit:
- Never powers on
- Powers on and immediately shuts down
- Stops after operating for a period
- Restarts when the battery or platform is moved
Inspect for obvious impact damage, contamination, unusual odor, excessive heat, or signs of fluid intrusion.
Expected outcome: The failure pattern is clearly reproduced or documented without placing a patient at risk. If significant physical damage, overheating, odor, or fluid intrusion is present, remove the device from service and stop troubleshooting.
3. Verify Battery Condition and Installation
Remove the installed battery and inspect the battery housing, contacts, latch area, and platform battery interface for contamination, damage, bent components, or incomplete seating.
Reinstall a battery known to be charged and serviceable, ensuring it is fully seated and secured.
Expected outcome: The AutoPulse powers on normally and remains stable with the known-good battery. If so, isolate the original battery for separate evaluation and troubleshooting can stop after functional verification.
4. Compare With a Second Known-Good Battery
If the platform still does not power correctly, test another known-good compatible battery to distinguish a platform problem from a single battery problem.
Do not repeatedly cycle questionable batteries through a device that is shutting down unpredictably during operation.
Expected outcome: Consistent normal operation with multiple known-good batteries indicates the original battery was the likely external cause. Continued failure with multiple batteries suggests the platform requires further evaluation.
5. Inspect External Battery Contacts and Mechanical Fit
With the battery removed, inspect accessible platform contacts and surrounding structure for:
- Debris
- Corrosion
- Deformation
- Loose or damaged battery-retention features
- Evidence that vibration or movement can interrupt contact
Do not bend, reshape, or internally repair battery contacts without approved service documentation.
Expected outcome: Contacts and retention components are clean, intact, and maintain stable battery engagement. If correcting accessible contamination restores stable power, proceed to final verification.
6. Check Controls and Operating Environment
Verify that the power control operates normally and is not physically stuck, obstructed, or damaged. Evaluate whether the reported shutdown occurred after impact, transport vibration, extreme environmental exposure, or contamination.
Allow the unit to reach an appropriate clinical operating environment before retesting if it has been exposed to abnormal storage or transport conditions.
Expected outcome: Controls operate consistently and environmental causes are ruled out. Repeated unexplained shutdowns require removal from service.
7. Perform Non-Patient Functional Verification
Using a known-good battery and approved setup, power the AutoPulse on and verify that it completes its normal startup sequence without unintended shutdown.
Observe the platform during repeated safe handling and a controlled functional check.
Expected outcome: The platform powers on reliably, remains operating, and shows no recurrence of the reported shutdown. If verified, troubleshooting can stop and the device may proceed through required return-to-service testing.
8. Escalate Persistent Power Failure
If the platform fails with known-good batteries, has intermittent power related to movement, repeatedly restarts, or shuts down during functional testing, do not return it to clinical use.
Expected outcome: The device is removed from service and sent for qualified bench evaluation rather than being repeatedly tested in patient care.
If the Problem Persists
Common external causes such as battery charge, battery seating, accessible contacts, controls, physical condition, and environment have been ruled out.
The remaining problem may involve an internal power-distribution, control, connection, or other service-level fault. The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate ZOLL documentation and approved test equipment
- Repaired or configured only by qualified personnel
Do not perform internal board-level troubleshooting or deep disassembly without authorized procedures.
After corrective service, complete all required functional and return-to-service testing before the AutoPulse is made available for patient care.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Always establish uninterrupted manual CPR or another verified compression method before investigating an AutoPulse that loses power during use.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the AutoPulse powered off unexpectedly during an equipment readiness check."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the installed battery was not maintaining reliable operation, while the platform remained stable with a known-good charged battery."
Resolution
What action was taken.
Example:
"Replaced the suspect battery, verified secure battery installation, completed functional testing, and confirmed stable platform operation."
Helpful Details to Include (If Known)
- Whether the platform failed to start or shut down after starting
- Battery used when failure occurred
- Results with known-good batteries
- Battery seating and contact condition
- Any impact, fluid exposure, heat, or contamination
- Whether movement affected power
- Startup behavior before and after correction
- Final device status
Final Thought
Protect the patient first, then isolate battery, seating, controls, and external condition before assuming an internal power failure. Verify stable operation and document the confirmed cause before return to service.
That is successful troubleshooting.