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What This Guide Helps With
Troubleshoots charging and short-runtime complaints involving AC power, power cords, outlets, charging status, battery condition, and service-level power faults.
Step-by-Step Troubleshooting
1. Protect the Patient From Unexpected Power Loss
Do not rely on a tourniquet system with uncertain battery runtime for transport or clinical use where loss of power could affect therapy. Use a verified alternate system when necessary. Expected outcome: Clinical care does not depend on an unreliable battery.
2. Confirm the Complaint
Determine whether the battery does not charge, charge indication is absent, runtime is shorter than expected, or the device shuts down after disconnecting AC power. Expected outcome: The power complaint is clearly characterized.
3. Verify the AC Source
Connect the unit to a known-good hospital-grade outlet appropriate for the equipment. If necessary, verify the receptacle with approved electrical test methods. Expected outcome: Reliable AC power is available to the unit.
4. Inspect the Power Cord and Connection
Examine the accessible power cord, plug, strain relief, and unit connection for looseness, cuts, heat damage, bent contacts, or other visible defects. Expected outcome: The power connection is secure and undamaged. Replace an approved detachable cord if defective and retest.
5. Verify Normal AC Operation
Confirm the unit powers and operates normally from AC without intermittent resets or loss of power. Observe the normal charging or battery status indicators available to the user. Expected outcome: Stable AC operation and normal charging indication are present.
6. Allow Appropriate Charging Opportunity
If the unit has been stored or used extensively on battery, connect it to AC according to normal facility and manufacturer practices before judging runtime. Do not invent or assume a specific charge duration. Expected outcome: The device has had an appropriate opportunity to recharge.
7. Check for Environmental or Use Factors
Determine whether the complaint occurred after prolonged storage, repeated transport use, disconnected AC power, or unusually frequent battery operation. Inspect for excessive heat, swelling, odor, or other signs requiring immediate removal from service. Expected outcome: No external usage or environmental condition explains the short runtime, and no unsafe battery condition is present.
8. Test Battery Operation Under Controlled Conditions
With the device removed from patient care, evaluate battery operation using the manufacturer-approved procedure and appropriate test equipment available to Clinical Engineering. Expected outcome: Battery operation is stable and consistent with the applicable service criteria. Troubleshooting can stop if testing passes.
9. Evaluate Battery Replacement Through Approved Service Procedures
If approved testing identifies a depleted or failed replaceable battery, replace it only according to manufacturer-authorized service procedures and applicable facility practices. Expected outcome: The repaired unit charges and operates normally on both AC and battery after verification.
10. Escalate Unresolved Charging Failure
If AC input is verified but charging remains abnormal, do not perform unapproved internal power-supply or charging-circuit repair. Expected outcome: The system is removed from service and referred for qualified bench evaluation.
If the Problem Persists
The external outlet, power cord, connections, charging opportunity, and basic operating conditions have been ruled out. Remaining possibilities include battery degradation, internal charging circuitry, power-supply problems, battery monitoring, or another service-level fault.
Remove the device from service, label it Out of Service, and evaluate it using appropriate Zimmer Biomet documentation and approved electrical and battery test equipment. Battery replacement or internal repair should be performed only by qualified personnel.
Before return to service, verify AC operation, charging, battery operation, startup, alarms, and all functionality affected by the repair.
Clinical Use Tip
Do not begin transport or a procedure relying on battery operation when the A.T.S. 4000 has an unresolved charging or runtime complaint.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported that the A.T.S. 4000 showed short battery runtime and shut down shortly after being disconnected from AC power."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering verified normal AC input and charging operation but found the battery failed the approved battery performance evaluation."
Resolution
What action was taken.
Example:
"Replaced the battery through the approved service procedure and verified normal charging, AC operation, and battery operation before return to service."
Helpful Details to Include (If Known)
- AC or battery operation at failure
- Outlet tested
- Power cord condition
- Charging indicator status
- Shutdown behavior
- Storage or transport history
- Battery test results
- Visible heat, odor, swelling, or damage
- Repair performed
- Final AC and battery test results
- Final device status
- AC or battery operation at failure
- Outlet tested
- Power cord condition
- Charging indicator status
- Shutdown behavior
- Storage or transport history
- Battery test results
- Visible heat, odor, swelling, or damage
- Repair performed
- Final AC and battery test results
- Final device status
Final Thought
Power problems should be separated into external AC supply, connection, charging, and battery performance before internal failure is assumed. Protect the patient from unexpected shutdown, verify the repair completely, and document objective test results.
That is successful troubleshooting.