GE Healthcare Aisys

Asset Type

Anesthesia Machine

Manufacturer

GE Healthcare

Model

Aisys

What This Guide Helps With

This guide helps troubleshoot an ACB FLASH FAIL alarm on a GE Healthcare Aisys anesthesia machine. This alarm is associated with a code-space CRC failure and can result in system malfunction, failed startup, failed checkout, or unreliable anesthesia machine operation.

Because this condition involves the Anesthesia Control Board code space or flash integrity, the machine should not be trusted for patient use until the alarm is cleared, the system passes required checks, and the issue does not return.

Step-by-Step Troubleshooting

1. Ensure Patient Safety First

• Remove the anesthesia machine from patient use if the alarm occurs during setup, checkout, standby, or operation.
• If the machine is connected to a patient, have anesthesia staff transfer the patient to another anesthesia machine or approved backup ventilation and anesthesia support.
• Do not continue using the machine with an unresolved system malfunction alarm.
• Do not attempt to bypass the alarm or force the machine into clinical use.

Expected outcome: Patient care is maintained using reliable equipment.

Why it matters: A flash or code integrity failure can affect system control and may make the anesthesia machine unsafe or unreliable.

2. Verify the Reported Alarm and Behavior

• Confirm the exact alarm displayed is ACB FLASH FAIL.
• Observe whether the alarm occurs during startup, system checkout, standby, active use, or intermittently after reboot.
• Look for associated symptoms such as system malfunction messages, failure to complete startup, failed checkout, unresponsive controls, unexpected resets, or abnormal display behavior.
• Document whether the alarm appears immediately or only after a specific sequence.

Expected outcome: The alarm is confirmed and the behavior is clearly observed.

Why it matters: This helps confirm a true system-reported Anesthesia Control Board condition instead of a user setup issue or unrelated alarm.

3. Power Down and Reboot the System

• Safely power down the Aisys.
• Wait briefly before powering the machine back on.
• Allow the system to complete startup.
• Observe whether the ACB FLASH FAIL alarm returns.
• If the alarm clears, run the required checkout before considering the machine for use.
• Return the machine to service only if checkout passes and the alarm does not return.

Expected outcome: The system boots normally and the alarm clears.

Why it matters: A reboot may clear a temporary software state or startup fault, but a repeated alarm indicates a more serious condition.

4. Check External Power and Basic Conditions

• Confirm the machine is connected to a known-good AC outlet.
• Inspect the power cord for damage, looseness, or signs of stress.
• Verify the machine is not repeatedly switching between AC power and battery.
• Check for obvious external damage, fluid intrusion, overheating, unusual odor, or signs of impact.
• Confirm the machine is in a safe environment for startup and checkout.

Expected outcome: The machine has stable power and no obvious external condition contributing to the malfunction.

Why it matters: While ACB FLASH FAIL points toward an internal control or software integrity issue, unstable power or physical damage should be ruled out before escalation.

5. Review Recent Events or Service History

• Ask clinical staff or review the work order for recent power loss, unexpected shutdown, failed startup, or failed checkout.
• Check whether any software service activity, ACB-related service, machine movement, impact, fluid spill, or cleaning event occurred recently.
• Document any event that may have occurred before the alarm appeared.

Expected outcome: Any contributing event is identified and documented.

Why it matters: A CRC failure in code space may follow software corruption, failed update activity, board failure, abnormal power interruption, or physical damage.

6. Repeat Startup Observation After Reboot

• After confirming stable power, restart the machine again if appropriate.
• Observe whether the alarm returns consistently.
• Confirm whether the alarm appears immediately, after startup, during checkout, or only after a specific action.
• Record whether the alarm is repeatable or intermittent.

Expected outcome: The issue is either cleared or reproducible.

Why it matters: A persistent or repeatable ACB FLASH FAIL strongly suggests the fault is not caused by user setup, accessories, or normal configuration.

7. Do Not Attempt Clinical Use if Alarm Returns

• If ACB FLASH FAIL returns after reboot, stop troubleshooting at the user-accessible level.
• Do not attempt to bypass the alarm.
• Do not release the machine for patient use.
• Remove the machine from service and escalate for repair or bench evaluation.

Expected outcome: The machine remains out of service until evaluated and repaired.

Why it matters: This alarm indicates a system malfunction related to code-space CRC failure, which can compromise controller reliability.

If the Problem Persists

If the ACB FLASH FAIL alarm continues after reboot and basic external checks, external and common causes have been ruled out.

A persistent ACB FLASH FAIL condition strongly indicates an internal Anesthesia Control Board failure or corrupted board-level code space.

The device should be removed from service, labeled Out of Service, and sent for repair or bench evaluation. Escalate for Anesthesia Control Board evaluation or replacement according to the appropriate service procedure.

Knowing when to stop is proper troubleshooting. Once this alarm persists after reboot and basic checks, it should not be treated as an accessory issue, user setup issue, or normal operating alarm.

Clinical Use Tip

Never troubleshoot this alarm on an active patient. Move the patient to a backup anesthesia machine or approved ventilation method first. An anesthesia machine with an unresolved controller or code integrity alarm should not be relied on for patient care.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"GE Healthcare Aisys anesthesia machine reported ACB FLASH FAIL alarm during startup. System malfunction was present and machine was not cleared for patient use."

Cause

What was observed during troubleshooting.

Example:
"Alarm persisted after reboot and external checks. Stable AC power was verified. Condition indicates likely internal Anesthesia Control Board code-space or flash integrity failure."

Resolution

What action was taken.

Example:
"Removed machine from service, labeled Out of Service, verified AC power and power cord condition, rebooted system, confirmed ACB FLASH FAIL returned, and escalated for bench evaluation and possible ACB replacement."

Helpful Details to Include (If Known)

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

Final Thought

ACB FLASH FAIL should be treated as a serious system malfunction, not a routine setup problem. Rebooting is a reasonable first step, but a repeated alarm points toward an internal controller or code integrity failure. Patient safety, logical verification, proper escalation, and clear CCR documentation are the correct path.

That is successful troubleshooting.