GE Healthcare Aisys

Asset Type

Anesthesia Machine

Manufacturer

GE Healthcare

Model

Aisys

What This Guide Helps With

This guide helps troubleshoot a BATTERY EMPTY alarm on a GE Healthcare Aisys anesthesia machine. This alarm indicates the system has critically low battery power and may shut down in less than 5 minutes if AC power is not restored or maintained. Because this can affect patient ventilation and anesthesia delivery, patient safety and reliable power must be confirmed before continuing troubleshooting.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Remove the anesthesia machine from patient use if the alarm cannot be corrected immediately.
• If the machine is in active use, notify anesthesia staff immediately.
• Make sure the patient can be ventilated safely using another anesthesia machine, manual ventilation, or another approved backup method.
• Do not rely on battery operation while this alarm is active.

Verify the Reported Alarm and Behavior

• Confirm the displayed alarm is BATTERY EMPTY.
• Confirm whether the displayed message indicates System shutdown in <5 min.
• Note when the alarm occurs, such as during startup, while unplugged, after being moved between rooms, while connected to wall power, or intermittently during normal operation.
• Look for associated symptoms such as a low battery icon, loss of battery backup, battery not charging, power cord issues, or unexpected shutdown risk.

Confirm AC Power Is Connected

• Verify the Aisys is plugged into a working hospital-grade outlet.
• Check that the power cord is fully seated at the wall outlet and at the anesthesia machine.
• Look for a loose, damaged, or partially disconnected power cord.
• Confirm the machine is not still running on battery power due to a loose or failed AC connection.

Test the Wall Outlet

• Plug another known-working device or outlet tester into the same outlet, if allowed by facility procedure.
• Try a different verified outlet if the outlet is questionable.
• Avoid using an outlet controlled by a wall switch or nonessential power source.
• Confirm stable AC power is available before assuming the machine has an internal fault.

Check the Power Cord Condition

• Inspect the power cord for cuts, crushed areas, loose plug blades, bent pins, overheating, or intermittent connection when moved.
• If the cord is removable and a known-good approved cord is available, swap it for testing.
• Reconnect the machine to verified AC power and monitor whether the alarm changes or clears.

Leave the System Plugged In to Charge

• Keep the machine connected to verified AC power.
• Allow the battery time to charge.
• Monitor whether the BATTERY EMPTY alarm clears or changes to a less critical battery condition.
• If the machine was stored unplugged or transported on battery, the battery may be deeply discharged.

Check Recent Use or Storage History

• Ask staff whether the machine was stored unplugged, moved between rooms, left off charge overnight, or used during a power interruption.
• Ask whether battery-related alarms have occurred before.
• Repeated battery drain or repeated failure to charge may indicate a failed battery or charging problem.

Inspect External Battery-Related Conditions

• Check for obvious external signs of damage or unsafe conditions.
• Look for a battery compartment that is not fully secured, fluid intrusion, burning smell, heat near the power entry area, or repeated battery alarms after charging.
• If heat, odor, fluid intrusion, or physical damage is present, stop troubleshooting and remove the machine from service.

Recheck After Charging

• After the machine has been connected to verified AC power, recheck the alarm status.
• Confirm whether the BATTERY EMPTY alarm clears.
• Verify the battery charge level increases and the machine remains powered normally on AC power.
• Confirm battery backup status is restored before returning the machine to clinical use.

Perform a Functional Power Check When Safe

• Only perform power checks when the machine is not in patient use.
• Verify the machine powers normally on AC power.
• If appropriate for department procedure, briefly confirm battery backup behavior without allowing the machine to reach a critical shutdown state.
• Reconnect AC power immediately after the check.

Check the Battery Charge Circuit if the Alarm Persists

• If the alarm remains after adequate charging on verified AC power, evaluate battery charging behavior using approved service procedures.
• Use Service Software only if authorized and trained to do so.
• Check whether the battery appears to be accepting charge and whether the charge circuit behavior is abnormal.

Replace the Battery if Needed

• If testing indicates the battery does not recover, does not hold charge, or fails battery-related checks, replace the battery according to facility procedure and approved parts requirements.
• After replacement, charge and retest the machine.
• Confirm the BATTERY EMPTY alarm no longer appears before returning the device to service.

Stop When Resolved

• If the alarm clears after charging, AC power is verified, and the machine passes required checks, return the device to service.
• Document the outlet tested, charging time, final alarm status, and final device condition.
• If the alarm returns or battery backup cannot be trusted, remove the device from service.

If the Problem Persists

If the BATTERY EMPTY alarm continues after verified AC power, outlet testing, power cord inspection, adequate charging time, and battery evaluation, external and common causes have been ruled out.

A persistent alarm may indicate a failed battery, a battery that is not accepting charge, a battery charge circuit failure, a power supply issue, or an internal monitoring fault.

Remove the anesthesia machine from service. Label it Out of Service. Send it for repair or bench evaluation. Do not continue using the machine clinically with unresolved battery backup failure.

Clinical Use Tip

Never troubleshoot a BATTERY EMPTY alarm on an active patient unless the immediate goal is to maintain safe power and ventilation. Move the patient to a backup device or approved alternate ventilation method first. A device warning of less than 5 minutes of battery backup should not be trusted 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 displayed BATTERY EMPTY alarm with message indicating system shutdown in <5 min."

Cause

What was observed during troubleshooting.

Example:
"Machine battery was critically depleted. Verified AC outlet and power cord connection. Battery required charging. Alarm cleared after charging on verified AC power."

Resolution

What action was taken.

Example:
"Connected machine to verified AC power, allowed battery to charge, rechecked alarm status, and confirmed battery indication improved. Machine passed required checks and was returned to service."

Helpful Details to Include (If Known)

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

Final Thought

A BATTERY EMPTY alarm on an anesthesia machine is a patient safety issue because the system is warning that shutdown may occur in less than 5 minutes. Start with the power source, cord, outlet, and charging checks before assuming internal failure. If the alarm does not clear after proper charging and verification, remove the machine from service and escalate for repair. Clear documentation shows what was checked, what was ruled out, and why the final decision was made.

That is successful troubleshooting.