GE Healthcare MAC VU360

Asset Type

Electrocardiograph (EKG) Machine

Manufacturer

GE Healthcare

Model

MAC VU360

What This Guide Helps With

Troubleshooting MAC VU360 WLAN connection, SSID, wireless signal, credential, security, or transfer failures using external and configuration checks first.

Step-by-Step Troubleshooting

Ensure Patient Safety First

Confirm the ECG is not actively being used for patient acquisition or urgent ECG transmission.

If the unit is needed for immediate patient care, move staff to another working ECG machine or use the approved downtime workflow.

Expected outcome: Patient ECG acquisition and transmission are not delayed by troubleshooting.

Confirm the Reported Wireless Failure

Ask clinical staff what failed and when it occurred.

Identify whether the issue involves:

• No wireless connection
• Cannot find the wireless network
• Connects but does not transmit
• DICOM, MUSE, or order download failure over Wi-Fi
• Intermittent wireless dropouts
• WLAN diagnostics failure
• Wireless works in one area but not another

Expected outcome: The failure is defined before network settings are changed.

Check Whether the Problem Is Wireless Only

If available, test the device on a known-good wired LAN connection.

Confirm whether ECG transmission, order download, or system communication works over LAN.

Expected outcome: If LAN works but WLAN fails, the issue is likely wireless configuration, signal, access point, antenna/module, or WLAN security related.

If LAN also fails, troubleshoot general network, server, MUSE, DICOM, or device communication settings before focusing only on WLAN.

Confirm Wireless Is Enabled

Check the MAC VU360 communication or network settings and confirm WLAN is enabled.

Verify the device is not set to wired-only communication or another communication profile.

Expected outcome: The device is configured to attempt wireless communication.

If enabling the correct WLAN setting resolves communication, document the correction and stop.

Verify the Correct SSID

Confirm the MAC VU360 is trying to connect to the correct hospital wireless SSID.

Compare the configured SSID with the approved clinical network information.

Watch for similarly named guest, public, test, or legacy networks.

Expected outcome: The ECG is pointed to the correct wireless network.

If correcting the SSID resolves communication, document the change and stop.

Check Wireless Range and Location

Move the ECG to an area with known-good wireless coverage.

If another MAC VU360 or similar clinical device works in the same area, compare performance.

Expected outcome: Wireless failure is separated from poor signal coverage or local access point issues.

If the unit works in one area but not another, escalate to network support for wireless coverage or access point review.

Check Signal Strength

Review wireless signal strength at the MAC VU360 if visible in the device settings or WLAN diagnostics.

Weak or fluctuating signal can cause intermittent transmission failures even when the device appears connected.

Expected outcome: The device has stable signal strength before communication testing continues.

Verify Wireless Credentials

Confirm the configured wireless credentials are correct.

Depending on the facility setup, this may include:

• Pre-shared key
• Username and password
• Certificate requirement
• Authentication method
• Network profile assigned to the device

Expected outcome: The ECG has valid credentials for the approved clinical WLAN.

If credentials were changed by IT or expired, coordinate with network support before returning the device to service.

Check Wireless Security Requirements

Confirm the MAC VU360 wireless profile matches the hospital wireless security requirements.

Review whether the network requires WPA/WPA2 settings, enterprise authentication, certificates, MAC address registration, or device whitelisting.

Expected outcome: The ECG wireless configuration matches the current network security policy.

If security settings do not match, correct only approved configuration items or escalate to the appropriate network or GE support team.

Confirm Country or Region Wireless Settings

Check that the wireless country or region setting is correct for the facility.

Incorrect region settings may affect available wireless channels or allowed WLAN operation.

Expected outcome: The MAC VU360 wireless region setting matches the device location and approved configuration.

Run WLAN Diagnostics

Use the MAC VU360 WLAN Diagnostics function listed in the service information.

Record whether diagnostics show:

• Wireless adapter present
• SSID detected
• Signal strength
• Association success or failure
• Authentication failure
• IP address status
• Gateway or server reachability issue

Expected outcome: WLAN Diagnostics narrows the issue to signal, authentication, IP/network routing, or hardware detection.

Check IP Address and Network Assignment

Confirm the device receives the expected IP address, subnet, gateway, and DNS information if those details are visible.

If the unit connects to the SSID but cannot communicate with MUSE, DICOM, or servers, the issue may be DHCP, VLAN, routing, firewall, or DNS related.

Expected outcome: Wireless connection and network communication are both verified, not just SSID association.

Compare Against a Known-Good MAC VU360

If another MAC VU360 is working on WLAN, compare non-sensitive configuration items.

Check SSID, communication profile, wireless mode, server destination, and general network setup.

Do not copy passwords, certificates, or restricted credentials unless following approved facility and vendor procedures.

Expected outcome: Device-specific configuration differences are identified.

Inspect External Wireless Hardware Indicators

Without opening the device, check for obvious external damage, missing covers, impact damage, or signs that the unit was dropped.

If the wireless module is not detected in diagnostics or WLAN settings are unavailable, suspect internal wireless hardware or antenna-related failure.

Expected outcome: External damage or missing WLAN detection is identified before escalation.

Restart and Retest Safely

If allowed by department workflow, restart the MAC VU360 after confirming no active patient data will be lost.

Recheck WLAN connection, run WLAN Diagnostics again, and attempt a test transmission according to site policy.

Expected outcome: Temporary communication faults are cleared without affecting patient care.

If the wireless connection and transmission now pass, return the device to service and document the successful retest.

If the Problem Persists

If wireless settings, SSID, signal strength, credentials, region settings, WLAN Diagnostics, LAN comparison, and network access point checks do not resolve the issue, common external causes have been ruled out.

The MAC VU360 should be:

• Removed from service if wireless communication is required for clinical workflow
• Labeled Out of Service
• Sent for bench evaluation or vendor service review
• Escalated to IT/network support if diagnostics suggest authentication, DHCP, routing, VLAN, firewall, certificate, or access point failure
• Escalated to repair if WLAN hardware is not detected or wireless failure follows the device across known-good areas

Knowing when to stop is proper troubleshooting. Do not continue repeated configuration changes without confirming the approved network settings.

Clinical Use Tip

Do not troubleshoot wireless communication during an active ECG acquisition or urgent patient event. If ECG transmission is needed immediately, acquire the ECG on another working device or follow the approved downtime process before continuing troubleshooting. Move the patient to a backup device first when therapy continuity or urgent ECG workflow could be affected.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Clinical staff reported the GE MAC VU360 would not connect to the wireless network and ECGs were not transmitting to MUSE over WLAN."

Cause

What was observed during troubleshooting.

Example:
"WLAN Diagnostics showed the device was in range but was configured for the wrong hospital SSID."

Resolution

What action was taken.

Example:
"Corrected the WLAN profile to the approved clinical SSID, verified wireless connection, completed successful test transmission, and returned the ECG machine to service."

Helpful Details to Include (If Known)

• Alarm behavior or wireless failure message shown to staff
• Accessories swapped or network connection method tested
• Power behavior, restart behavior, and whether LAN communication worked
• Environmental factors such as device location, signal coverage, wireless SSID verified, and access point area
• Indicator lights, WLAN Diagnostics result, authentication or credential error, and IP address/DHCP status
• MUSE, DICOM, or order download behavior
• Whether another MAC VU360 worked in the same area
• Any access point, VLAN, firewall, or certificate escalation
• Final device status

Final Thought

Wireless communication issues should be approached logically. Confirm patient safety first, separate WLAN failure from general network failure, verify the approved SSID and credentials, run WLAN Diagnostics, and escalate when the issue points beyond Clinical Engineering configuration checks. Accurate CCR documentation helps identify repeat wireless coverage, network, or device-specific failures.

That is successful troubleshooting.