Medtronic Valleylab FT10

Asset Type

Electrosurgical Unit (ESU)

Manufacturer

Medtronic

Model

Valleylab FT10

What This Guide Helps With

Error E355 Invalid Activation indicates that the Valleylab FT10 has detected an unsupported activation request, commonly when a foot pedal is used with an instrument or setup that requires activation from the instrument only. This can prevent proper ESU output and delay cutting, coagulation, bipolar, or vessel sealing workflow.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Remove the Valleylab FT10 from patient use if activation is not behaving as expected or if the error occurs during a procedure.
• Stop using the affected activation method.
• Confirm the patient is not dependent on the ESU for active cutting, coagulation, or vessel sealing.
• Use another verified ESU if the procedure must continue.
• Do not troubleshoot activation problems on an active patient setup.

Verify the Reported Error and Behavior

• Power on the FT10 and observe the display.
• Confirm the message shows Error: E355 Invalid Activation.
• Ask staff what was happening when the error appeared, including whether the foot pedal was pressed, an instrument was connected, or activation was attempted.
• Note whether the message clears after being dismissed or returns repeatedly.

Confirm Correct Activation Method

• Check the connected instrument and the intended activation method.
• Confirm whether the instrument supports foot pedal activation or requires activation from the instrument hand controls.
• If the system indicates activation from instrument only, instruct the user to activate from the instrument instead of the foot pedal.
• If the ESU operates normally using the correct activation method, return the device to service after confirming normal operation.

Dismiss the Error and Reactivate Correctly

• Press the on-screen prompt to dismiss the error.
• Do not press the foot pedal if the setup does not support foot pedal activation.
• Reactivate using the instrument hand switch or other supported activation method.
• Observe whether the error returns.

Inspect the Foot Pedal Connection

• Disconnect the foot pedal from the FT10.
• Inspect the connector for bent pins, contamination, fluid, damage, or poor seating.
• Inspect the foot pedal cable for cuts, crushed areas, strain relief damage, or fluid intrusion.
• Reconnect the foot pedal only if it is appropriate for the procedure setup.

Try Operation Without the Foot Pedal

• Remove the foot pedal from the FT10.
• Connect the intended instrument.
• Dismiss the error if present.
• Activate from the instrument only.
• If the error disappears with the foot pedal removed, suspect the foot pedal, foot pedal cable, foot pedal port, or activation configuration before suspecting the generator.

Swap the Foot Pedal if Clinically Appropriate

• Use a known-good compatible foot pedal only if the instrument and mode support foot pedal activation.
• Confirm the replacement foot pedal is seated correctly.
• Attempt activation only in a supported setup.
• If the replacement foot pedal works correctly, remove the failed foot pedal from service and document the accessory failure.

Check for Unintended Foot Pedal Activation

• Inspect the pedal for stuck movement, debris, fluid contamination, damaged housing, or physical pressure from nearby equipment.
• Confirm the pedal moves freely and is not partially activated.
• Remove any damaged or questionable foot pedal from service.

Check Instrument and Setup

• Disconnect and reconnect the instrument.
• Inspect the instrument connector for damage, contamination, or poor seating.
• Confirm the instrument is connected to the correct port.
• Use a known-good compatible instrument if available.
• Confirm the FT10 recognizes the instrument correctly and allows the proper activation method.

Isolate Accessory vs Device Issue

• Test the FT10 with the foot pedal removed.
• Test with a known-good compatible foot pedal when the mode supports foot pedal activation.
• Test with a known-good compatible instrument.
• Confirm the correct activation method is being used.
• If the error follows the foot pedal, remove the foot pedal from service.
• If the error follows the instrument, remove the instrument from use.
• If the error remains on the FT10 with known-good accessories and correct setup, suspect an internal device issue.

If the Problem Persists

If E355 continues after removing or replacing the foot pedal, confirming the correct activation method, checking the instrument, and using known-good compatible accessories, external causes have been ruled out.

• Remove the Valleylab FT10 from service.
• Label the ESU Out of Service.
• Do not return it to clinical use.
• Send the device for repair or bench evaluation.
• Document that persistent E355 may indicate an internal controller or foot pedal input circuit issue.

Clinical Use Tip

Never troubleshoot activation errors on an active patient. Move the patient to a backup device first if electrosurgical energy is needed. If the FT10 reports E355, confirm whether the connected instrument supports foot pedal activation before assuming the generator has failed.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"User reported Medtronic Valleylab FT10 displaying Error E355 Invalid Activation during attempted foot pedal activation."

Cause

What was observed during troubleshooting.

Example:
"Foot pedal activation was not supported for the connected instrument/setup. Error cleared when activation was performed from the instrument controls."

Resolution

What action was taken.

Example:
"Dismissed error, verified correct activation method, inspected foot pedal and instrument connections, confirmed normal operation using instrument activation only, and returned ESU to service."

Helpful Details to Include (If Known)

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

Final Thought

Error E355 should be approached as an activation-method problem first, not an immediate internal failure. Start with patient safety, confirm the exact error, verify whether the instrument supports foot pedal activation, and rule out damaged accessories before escalating. If the message persists with correct setup and known-good accessories, remove the FT10 from service for further evaluation.

That is successful troubleshooting.