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Manufacturer
Model
What This Guide Helps With
Low or no oxygen flow, weak output, or suspected compressor failure due to airflow restriction, power issues, or external component problems.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- If the unit is in use and flow is inadequate, immediately move the patient to a backup oxygen source.
- Expected: Patient continues receiving prescribed oxygen
- Why it matters: Insufficient oxygen delivery can quickly compromise patient safety
Verify the Reported Issue
- Power on the concentrator and observe:
- Is airflow weak or absent at the outlet?
- Are there alarms (low flow, pressure, or system fault)?
- Is the compressor attempting to run (audible hum or vibration)?
- Expected: Issue is clearly confirmed
- Why it matters: Differentiates between no flow, low flow, or intermittent operation
Check Flowmeter Setting and Output (Most Common Cause)
- Verify the flowmeter is set correctly and not turned down or closed.
- Confirm prescribed flow rate
- Check for obstruction at the outlet port
- Expected: Proper flow setting with unobstructed output
- Why it matters: Misadjusted flow or blockage can mimic compressor failure
Inspect External Tubing and Accessories
- Check all downstream components:
- Oxygen tubing not kinked or crushed
- No occlusions or moisture buildup
- Replace tubing if questionable
- Expected: Clear, unobstructed airflow path
- Why it matters: Restrictions reduce perceived flow even if compressor is functioning
Check Air Intake and Filters
- Inspect intake vents and filters:
- External intake filter clean and unobstructed
- No dust buildup blocking airflow
- Replace or clean filter per facility practice
- Expected: Free airflow into the unit
- Why it matters: Restricted intake reduces compressor efficiency and output
Listen for Compressor Operation
- With the unit powered on:
- Listen for compressor cycling or continuous run
- Note abnormal sounds (loud knocking, no sound, or excessive vibration)
- Expected: Smooth, consistent compressor sound
- Why it matters: No sound may indicate failure; abnormal noise may indicate wear or mechanical failure
Verify Power Source Stability
- Ensure the unit is receiving proper power:
- Plug into a known good outlet
- Avoid extension cords or power strips
- Confirm no intermittent power loss
- Expected: Stable operation with consistent power
- Why it matters: Low or unstable voltage can prevent compressor startup
Check for Overheating or Thermal Shutdown
- Inspect the unit:
- Is the unit excessively warm?
- Are vents blocked?
- Has the unit recently shut down and restarted?
- Allow unit to cool if overheated.
- Expected: Normal operating temperature
- Why it matters: Overheating can cause compressor shutdown or reduced output
Inspect for System Alarms or Indicators
- Check for:
- Low pressure or system fault alarms
- Service indicator lights
- Hour meter indicating maintenance interval reached
- Expected: No active fault indicators
- Why it matters: Alerts may indicate internal compressor or system degradation
If the Problem Persists
If airflow remains insufficient and compressor operation is abnormal or absent after external checks, the issue is likely internal (compressor failure, valve failure, or internal restriction).
Remove the unit from service, label it Out of Service, and send for repair or bench evaluation.
Knowing when to stop prevents unnecessary risk and reflects proper troubleshooting practice.
Clinical Use Tip
Never troubleshoot oxygen delivery issues on an active patient. Always transition to a backup oxygen source before evaluating the concentrator.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Oxygen concentrator reported low flow and inadequate oxygen delivery."
Cause
What was observed during troubleshooting.
Example:
"Compressor running weak due to restricted intake filter causing reduced airflow."
Resolution
What action was taken.
Example:
"Cleaned/replaced intake filter, verified proper airflow and normal unit operation."
Helpful Details to Include (If Known)
- Outlet tested and verified
- Tubing inspected/replaced
- Filter condition checked
- Compressor sound (normal/abnormal/none)
- Alarm or indicator status
- Heat or ventilation concerns
- Final device status (returned to service or removed)
Final Thought
Oxygen concentrator performance issues often appear severe but are frequently caused by simple airflow restrictions or setup problems. Always start with external checks, prioritize patient safety, and escalate appropriately when internal failure is suspected. Clear documentation ensures continuity and supports future maintenance decisions.
That is successful troubleshooting.