On this page
Asset Type
Sequential Compression Device (SCD)
Manufacturer
Model
What This Guide Helps With
Error E4 Low Pressure where sleeve or cuff fails to reach required compression levels, reducing DVT prevention effectiveness and resulting in inadequate therapy delivery.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the device from active patient use if proper compression is not being delivered
- Apply alternate DVT prophylaxis if needed
Verify the Reported Error and Behavior
- Power on the unit and confirm Error E4 Low Pressure is displayed
- Observe if the issue occurs during inflation cycles
- Check if sleeves or cuffs feel soft or underinflated
- Confirm the device continues cycling without reaching target pressure
Check Sleeve or Foot Cuff Application (Most Common Cause)
- Ensure correct size is being used
- Rewrap snugly without gaps or twisting
- Confirm proper contact between limb and sleeve
Inspect Tubing Connections
- Ensure tubing is fully seated in device ports
- Disconnect and reconnect all connections firmly
- Verify correct port usage
Check for Leaks in Sleeves, Cuffs, and Tubing
- Listen for hissing sounds during inflation
- Feel for escaping air along tubing and seams
- Inspect for cracks, punctures, or wear
Swap with Known-Good Accessories
- Replace sleeves or foot cuffs
- Try a different tubing set
- Observe if pressure returns to normal
Check for Kinks or Obstructions
- Straighten any tubing bends
- Ensure tubing is not pinched under equipment or bed rails
Power Cycle the Device
- Turn off the device
- Wait 10–15 seconds
- Restart and observe operation
If the Problem Persists
If all external causes such as sleeve fitment, tubing connections, leaks, and accessories are ruled out and Error E4 continues, internal pressure sensing or pump performance may be degraded.
- Remove device from service
- Label Out of Service
- Send for repair or bench evaluation
Clinical Use Tip
Never troubleshoot or continue using an SCD delivering low or inconsistent compression on an active patient. Always move the patient to a backup device first.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Device displaying Error E4 Low Pressure; sleeves not inflating adequately during therapy cycles."
Cause
What was observed during troubleshooting.
Example:
"Air leak identified in sleeve/tubing connection or no external issue found, indicating likely internal pump or pressure sensing failure."
Resolution
What action was taken.
Example:
"Replaced defective sleeve/tubing and verified proper pressure delivery or removed device from service and sent for repair after failed troubleshooting."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Low-pressure errors directly impact therapy effectiveness. Always start with simple external checks such as fitment and leaks before escalating. Proper troubleshooting protects patient safety and ensures reliable device performance.
That is successful troubleshooting.