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What This Guide Helps With
This guide assists Clinical Engineering in troubleshooting Puritan Bennett 560 ventilators experiencing battery issues, such as failure to charge or shortened runtime. These problems can compromise backup power during transport or power outages. Most causes are external or easily verifiable, including power supply problems, battery seating, or degraded battery health. This guide focuses on safe, step-by-step troubleshooting before escalating for repair.
Step-by-Step Troubleshooting
Verify AC Power Source
- Ensure the ventilator is connected to a working outlet.
- Test the outlet with a known working device.
- Why: A non-functional outlet or loose connection will prevent charging.
Inspect Power Cord and Connections
- Check for frayed cables, broken connectors, or loose plugs.
- Ensure the cord is fully seated in both the ventilator and outlet.
- Why: Damaged or loose cords prevent proper power delivery.
Check Battery Seating
- Remove the battery and reseat it according to manufacturer instructions.
- Ensure locking mechanism engages fully.
- Why: Improperly seated batteries may not charge or provide full runtime.
Observe Ventilator Indicators
- Check charging LED or screen battery icon for status.
- Note any error messages related to battery or power.
- Why: Indicators can reveal whether the device recognizes the battery.
Test with Spare/Service Battery
- If available, replace the battery with a known good unit.
- Observe charging behavior and runtime.
- Why: Confirms if the original battery is degraded or defective.
Allow Full Charge Cycle
- Connect the battery to AC power for the recommended charging time.
- Monitor if the battery reaches full charge and maintains it.
- Why: Short or interrupted charge cycles may give the appearance of failure.
If the Problem Persists
Common external causes have been ruled out. The battery is likely internally degraded or the charging circuit may be faulty.
- Remove the ventilator from service.
- Label “Out of Service – Battery Issue.”
- Send to qualified repair or bench evaluation.
- Knowing when to stop avoids patient risk and further device damage.
Clinical Use Tip
Never rely on a suspected faulty battery during patient transport. Always move the patient to another ventilator with verified battery functionality before troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
“Ventilator battery not charging and provides only 10 minutes of runtime.”
Cause
What was observed during troubleshooting.
Example:
Battery seated correctly but fails to accept charge; LED indicates low battery despite AC power.
Resolution
What action was taken.
Example:
Replaced battery with known good unit; device charges and holds runtime as expected. Original battery labeled for replacement/repair.
Helpful Details to Include
- Outlet tested: Yes/No
- Power cord inspected: Yes/No
- LED indicators: Charging, error codes
- Battery runtime before/after troubleshooting
- Ventilator in/out of service status
Final Thought
Patient safety comes first. Logical, stepwise troubleshooting can quickly identify external causes, but knowing when to escalate ensures safe operation. Proper documentation via CCR protects both the patient and the department.
That is successful troubleshooting.