On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
This guide helps troubleshoot Alarm 231006 Oxygen supply failed on the Hamilton C1 ventilator. This alarm may occur when oxygen supply pressure or O2 control flow is too low, which can affect the ventilator’s ability to deliver the expected FiO2.
The issue may be caused by a failed wall oxygen source, closed or low cylinder, damaged O2 hose, loose inlet connection, restricted inlet filter, transport setup problem, or an internal oxygen control or flow sensing fault.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Assess the patient immediately.
- Confirm the patient is receiving adequate ventilation and oxygenation.
- Check SpO2, work of breathing, airway status, and clinical condition.
- If oxygen delivery is questionable, transfer the patient to another ventilator or provide manual ventilation per clinical protocol.
- Remove the Hamilton C1 from patient use if the alarm cannot be corrected quickly.
Verify the Reported Alarm and Behavior
- Confirm the displayed alarm is Oxygen supply failed.
- Confirm Alarm ID 231006 if available in the event log or alarm history.
- Note whether the alarm occurs at startup, after connecting to wall oxygen, during transport, during high FiO2 demand, or intermittently during use.
- Check whether the ventilator continues operating on room air or if FiO2 delivery appears affected.
Confirm the Oxygen Source Is Available
- Confirm the wall oxygen outlet is active.
- Verify the oxygen source is not shut off.
- If using a cylinder, confirm the cylinder is open and has adequate pressure.
- Try a known-good oxygen source if available.
- Ask whether other devices connected to the same oxygen source are functioning normally.
Check the O2 Hose
- Confirm the O2 hose is connected at both ends.
- Check for loose fittings, damaged connectors, cracks, kinks, or pinched sections.
- Make sure the hose is the correct oxygen-rated hose.
- Swap with a known-good O2 hose if available.
Check the Oxygen Inlet Connection
- Confirm the oxygen hose fitting is fully seated at the ventilator inlet.
- Check for cross-threading, loose connection, damaged threads, or a damaged O-ring or seal if visible.
- Gently reseat the connection.
- Listen for leaks around the inlet connection.
Check Oxygen Supply Pressure
- Confirm the oxygen wall source or cylinder regulator is providing adequate pressure.
- If available, compare the outlet with a known-good oxygen analyzer, regulator, or another device.
- If the alarm occurs during high FiO2 or high flow demand, check whether the source pressure drops under load.
- Correct any weak regulator, low cylinder, restricted outlet, or supply problem before returning the ventilator to service.
Inspect the O2 Inlet Filter
- Inspect the oxygen inlet filter if accessible per facility procedure.
- Look for contamination, moisture, debris, or blockage.
- Replace or service the inlet filter only if allowed by your department procedure and manufacturer guidance.
Rule Out Transport or Setup Issues
- Check whether the ventilator was moved from wall oxygen to transport oxygen.
- Confirm the oxygen cylinder was opened after transport setup.
- Confirm the ventilator is not connected to the wrong gas outlet.
- Confirm the O2 hose is not trapped behind the bed, boom, cart, or wall rail.
- Ask staff whether the alarm started after moving the ventilator, changing rooms, replacing a cylinder, or reconnecting gas hoses.
Test With a Known-Good Oxygen Source and Hose
- Connect the Hamilton C1 to a known-good oxygen source.
- Use a known-good O2 hose.
- Power the ventilator on and confirm whether the alarm clears.
- If safe and appropriate, observe the ventilator while increasing FiO2 demand.
- If the alarm clears, the original oxygen source, hose, regulator, outlet, or connection was likely the cause.
- If the alarm remains, external oxygen supply causes have likely been ruled out.
Evaluate for Internal O2 Control or Flow Sensing Fault
- Remove the ventilator from patient use.
- Label it Out of Service.
- Document that wall oxygen, O2 hose, inlet connection, source pressure, and inlet filter were checked.
- Send the unit for bench evaluation or vendor/manufacturer service.
If the Problem Persists
If the oxygen wall source, cylinder or regulator, O2 hose, inlet connection, supply pressure, and inlet filter have been checked and the alarm remains, external and common causes have been ruled out.
At that point, the Hamilton C1 should be removed from service, labeled Out of Service, and sent for repair, bench evaluation, or manufacturer service support.
Persistent oxygen supply failed alarms may indicate a device-related oxygen control, inlet regulation, valve, pneumatic, or flow sensing issue.
Clinical Use Tip
Never troubleshoot this alarm on an active patient while oxygen delivery is uncertain. Move the patient to a backup ventilator or approved backup ventilation method first, then continue equipment troubleshooting only after patient safety is controlled.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Hamilton C1 ventilator reported Alarm 231006 Oxygen supply failed during use. Staff reported concern that delivered FiO2 may not match the set oxygen concentration."
Cause
What was observed during troubleshooting.
Example:
"Oxygen supply path issue suspected. Wall oxygen source, O2 hose, inlet connection, supply pressure, O2 inlet filter, and oxygen source availability were checked. Alarm persisted with known-good external oxygen supply, indicating likely internal O2 control or flow sensing fault."
Resolution
What action was taken.
Example:
"Removed ventilator from patient use, labeled Out of Service, and sent for bench evaluation/repair. Documented alarm behavior and external oxygen supply checks performed."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Alarm 231006 Oxygen supply failed should be handled as a patient safety issue first and a troubleshooting issue second. Start with the oxygen source, hose, inlet connection, pressure, and filter before suspecting the ventilator. If verified external oxygen supply does not clear the alarm, remove the Hamilton C1 from service and escalate for repair.
Clear CCR documentation helps show what was checked, what was ruled out, and why repair escalation was appropriate.
That is successful troubleshooting.