GE Healthcare Aisys

Asset Type

Anesthesia Machine

Manufacturer

GE Healthcare

Model

Aisys

What This Guide Helps With

This guide helps troubleshoot the GE Healthcare Aisys VENT VALVE POWER FAIL alarm. This condition indicates the ventilator valve power supply is outside the expected range and the machine may display Vent Fail. Monitoring Only.

When this alarm is active, mechanical ventilation may be unavailable or unreliable. The issue may involve ventilator valve power, the Vent Interface Board, the ACB-to-VIB power path, the VIB-to-pan harness, or related cabling.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Remove the anesthesia machine from active patient use if ventilation support is affected or the machine displays Vent Fail. Monitoring Only.
• Have anesthesia staff ventilate manually or move the patient to another functioning anesthesia machine or ventilator as clinically appropriate.
• Do not continue using the machine for patient ventilation with an unresolved ventilator power failure.
• Confirm patient ventilation is maintained using a safe alternate method before troubleshooting begins.

Verify the Reported Alarm and Behavior

• Confirm the exact alarm displayed is VENT VALVE POWER FAIL.
• Check whether the displayed message includes Vent Fail. Monitoring Only.
• Note whether the alarm occurs at startup, during checkout, when entering ventilation mode, or intermittently during operation.
• Confirm whether mechanical ventilation is unavailable or the machine is limited to monitoring only.

Translate the Alarm Into the Real-World Problem

• Treat this as a ventilator power/control issue, not a routine clinical alarm.
• The nominal 12.5 V ventilator valve supply may be detected below 11.3 VDC or above 13.13 VDC.
• Possible affected areas include the Vent Interface Board, ACB-to-VIB cabling, VIB-to-pan harness, or downstream ventilator valve load.
• Document the exact alarm text and any ventilation limitation reported by staff.

Check External and Simple Causes First

• Confirm the machine is connected to a known good AC outlet.
• Check that the power cord is fully seated and not damaged.
• Verify the machine powers on normally and does not show other power-related alarms.
• Inspect visible external cables, rear connections, and accessible areas for loose connections, damage, impact, or fluid exposure.

Run a Machine Checkout if Safe to Do So

• With the machine removed from patient use, attempt the appropriate pre-use checkout or system test.
• Watch for when the alarm appears.
• Note whether the alarm occurs immediately, only during ventilator checks, or only when ventilation is attempted.
• Document the failure pattern in the work order.

Access Service Software Diagnosis

• Use GE service software according to your facility’s service process.
• Access Vent Interface Board Power Diagnosis.
• View Vent Int Bd 10VA Voltage.
• View Vent Valve 10VA status.
• Use the diagnostic data to isolate the fault instead of guessing at parts.

Check Vent Interface Board 10VA Voltage

• If Vent Int Bd 10VA reads OK, continue checking the Vent Valve 10VA status.
• If Vent Int Bd 10VA reads Fail from the VIB but reads OK from the ACB, suspect the connection path between the ACB and VIB.
• Document whether the fault appears upstream, at the VIB, or downstream of the VIB.

Compare VIB Voltage Against Vent Valve 10VA Status

• If the VIB voltage reads OK but the Vent Valve 10VA reads Fail, disconnect the VIB-to-pan connector harness if appropriate for your service level.
• Recheck whether the failure continues.
• If the failure clears after disconnecting the harness, suspect the harness, pan connection, or downstream valve-related load.
• If the failure continues with the harness disconnected, suspect the Vent Interface Board.

Inspect and Reseat Related Cabling

• Power the device down and keep it removed from service before inspecting internal-access cabling.
• Inspect accessible cabling between the ACB and VIB.
• Inspect the VIB-to-pan connector harness and ventilator-related connector points.
• Look for loose connectors, bent pins, damaged wiring, pinched harnesses, fluid intrusion, overheating, odor, or discoloration.
• Reseat connectors only if accessible and appropriate for your shop’s service level.

Recheck the Alarm After Cable Inspection

• Reconnect any inspected harnesses securely.
• Power the machine back on.
• Run the same Vent Interface Board Power Diagnosis again.
• Confirm whether the VENT VALVE POWER FAIL alarm returns.
• If the alarm clears, run checkout successfully, verify ventilation operation, document the repair, and return the machine to service only after all required testing passes.

Isolate Likely Device-Level Failure

• If Vent Int Bd 10VA reads Fail from the VIB but OK from the ACB, focus on cabling between the ACB and VIB.
• If VIB voltage reads OK but Vent Valve 10VA remains Fail with the VIB-to-pan connector harness disconnected, replace or escalate replacement of the VIB according to your service process.
• If the fault points to a downstream load or harness problem, keep the machine out of service until the ventilator valve power path is repaired and verified.

If the Problem Persists

If the alarm remains after checking external power, visible connections, service software readings, and accessible cabling, external and common causes have been ruled out.

A persistent VENT VALVE POWER FAIL alarm strongly indicates an internal ventilator power/control failure, VIB failure, ACB-to-VIB cabling issue, VIB-to-pan harness issue, or downstream ventilator valve load problem.

The anesthesia machine should be removed from service, labeled Out of Service, and sent for repair or bench evaluation. Escalate to qualified anesthesia service support or GE Healthcare service if required.

Clinical Use Tip

Never troubleshoot this alarm on an active patient. If the Aisys displays Vent Fail. Monitoring Only., move the patient to a backup anesthesia machine, ventilator, or approved manual ventilation method before Clinical Engineering begins troubleshooting.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"GE Healthcare Aisys anesthesia machine reported VENT VALVE POWER FAIL alarm with displayed message Vent Fail. Monitoring Only. Machine unavailable for normal mechanical ventilation."

Cause

What was observed during troubleshooting.

Example:
"Service software Vent Interface Board Power Diagnosis indicated ventilator valve 10VA power fault. External power checks completed. Further isolation pointed toward VIB, ACB-to-VIB cabling, VIB-to-pan harness, or downstream ventilator valve power path."

Resolution

What action was taken.

Example:
"Removed anesthesia machine from service. Verified reported alarm and monitoring-only condition. Checked external power and visible connections. Ran Vent Interface Board Power Diagnosis and documented Vent Int Bd 10VA / Vent Valve 10VA findings. Inspected accessible cabling. Unit remained out of service for VIB, cabling, or ventilator power path repair evaluation."

Helpful Details to Include (If Known)

• Alarm behavior
• Accessories swapped
• Power behavior
• Environmental factors
• Indicator lights
• Final device status

Final Thought

This alarm should be treated as a serious ventilator power/control issue. Start with patient safety, confirm the displayed alarm, check simple external causes, then use service diagnostics to isolate the VIB, ACB-to-VIB cabling, VIB-to-pan harness, or downstream ventilator valve path. If the alarm persists, remove the anesthesia machine from service and escalate appropriately.

That is successful troubleshooting.