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What This Guide Helps With
Error 243.4070 indicating air-in-line subsystem self-test failure, preventing infusion due to inability to verify air detection safety function.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the pump from active patient use immediately
- Transfer infusion to a functioning pump
- Clamp tubing as needed to maintain safe therapy transition
Verify the Reported Error and Behavior
- Power on the pump and observe startup sequence
- Confirm Error 243.4070 appears during self-test
- Note if the pump fails to proceed to normal operation
- Check if the error occurs consistently at startup
Check for Set Loading and Channel Setup Issues
- Ensure correct BD-compatible administration set is used
- Open and reseat the set in the pump channel
- Verify tubing is properly aligned in the air-in-line sensor path
- Ensure the door is fully latched
Inspect Air-in-Line Sensor Area
- Open the pump door and inspect the detection channel
- Look for fluid contamination, residue, or debris
- Check for dried medication buildup in the sensor path
- Clean per facility-approved methods if contamination is present
Power Cycle the Pump
- Turn the pump or channel off
- Disconnect from AC power if applicable
- Wait 10–15 seconds
- Restart and observe the self-test
Test with No Set Installed
- Power on the pump with the channel empty
- Observe if the error still occurs
Test with a Known-Good Set
- Install a new, known-good BD-compatible administration set
- Load carefully and restart the pump
If the Problem Persists
If Error 243.4070 continues after verifying setup, cleaning the sensor area, power cycling, and testing with and without a set, external causes have been ruled out.
- Remove the device from service
- Label Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot on an active patient. Always move the patient to a backup device before attempting any troubleshooting steps.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"BD Alaris pump displaying Error 243.4070 during startup, preventing infusion"
Cause
What was observed during troubleshooting.
Example:
"Air-in-line subsystem failed internal self-test; error persisted after reseating set, cleaning sensor, and testing with known-good tubing"
Resolution
What action was taken.
Example:
"Removed pump from service, labeled out of service, and sent for repair"
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Self-test failures involving air detection are high-risk conditions. Proper troubleshooting focuses on ruling out setup and contamination issues quickly, then escalating appropriately to protect patient safety.
That is successful troubleshooting.