On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Error E356 System Error indicates an invalid RF calibration condition on the Medtronic Valleylab FT10. This may prevent normal ESU readiness and should be treated seriously because RF calibration affects controlled energy delivery for cut, coagulation, bipolar, and LigaSure output.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the Valleylab FT10 from patient use if Error E356 appears during setup, startup, or attempted activation.
- Disconnect the ESU from the active procedure area.
- Use another verified ESU if electrosurgery is needed.
- Do not attempt to use the unit for cutting, coagulation, bipolar, or LigaSure output while the error is unresolved.
Verify the Reported Error and Behavior
- Power the FT10 on and observe the startup sequence.
- Confirm the displayed message is Error: E356 System Error Invalid RF Calibration.
- Note whether the error appears during startup, after self-test, during activation, after connecting an accessory, or intermittently.
- Confirm the issue is reproducible before assuming a simple user setup problem.
Check Power Source and Startup Conditions
- Plug the unit directly into a known-good hospital-grade AC wall outlet.
- Avoid power strips, extension cords, or shared overloaded circuits.
- Confirm the power cord is fully seated and not damaged.
- Power cycle the unit after confirming proper power.
- If the error clears, document the outlet or power issue and complete normal functional checks before returning the ESU to service.
Inspect the Power Cord and External Condition
- Inspect the power cord, plug, strain relief, case, display, front panel, and output receptacles.
- Look for signs of fluid intrusion, impact damage, cracked housing, bent pins, contamination, heat, smoke, or burnt odor.
- If damage, fluid intrusion, heat, smoke, or odor is found, stop troubleshooting and remove the unit from service.
Remove Accessories and Recheck
- Power the unit off.
- Disconnect all patient cables, foot pedals, handpieces, bipolar instruments, LigaSure devices, REM cables, and adapters.
- Power the unit back on with only AC power connected.
- Observe whether Error E356 returns.
- If the error clears with accessories removed, reconnect one accessory at a time to identify whether a specific cable, instrument, or pedal is contributing to the issue.
Check for Accessory or Connector Contamination
- Inspect all ports and recently used accessories.
- Look for moisture, debris, damaged pins, residue, cracked connectors, or loose-fitting plugs.
- Pay close attention to active electrode ports, bipolar ports, LigaSure ports, REM connection, and foot pedal connection.
- Do not use damaged or contaminated accessories.
Confirm the Error Is Not Related to User Configuration
- Confirm the user was not attempting to use an unsupported instrument or incompatible accessory.
- Verify that the error appears even before selecting clinical output settings.
- Ask whether any recent service, calibration, software update, or repair occurred.
- If E356 appears independent of normal user settings, treat it as a service condition.
Attempt a Controlled Restart
- Turn the unit off.
- Allow the shutdown process to complete.
- Reconnect only the power cord.
- Turn the unit back on and observe whether the error returns.
- Do not repeatedly power cycle the ESU to force it into service.
Determine Whether RF Calibration Is Required
- If Error E356 remains present after external checks, treat it as an RF calibration or service-level issue.
- Do not open the unit for board-level troubleshooting during a normal floor response.
- Do not attempt clinical use.
- Route the unit for bench evaluation and RF energy calibration using approved service equipment and facility procedure.
If the Problem Persists
If Error E356 continues after confirming power, removing accessories, checking connectors, inspecting for damage, and performing a controlled restart, external and common causes have been ruled out.
Persistent Error E356 strongly indicates a service-level RF calibration problem or internal generator condition.
The device should be removed from service, labeled Out of Service, and sent for repair or bench evaluation. RF energy calibration should be performed according to approved service procedure, and the unit should not be returned to clinical use until calibration, testing, and service verification are successfully completed.
Clinical Use Tip
Never troubleshoot RF calibration errors on an active patient. Move the patient or procedure to a backup verified ESU first, then evaluate the affected generator away from the sterile field and patient care area.
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 E356 System Error Invalid RF Calibration. Unit was not considered safe for electrosurgical output."
Cause
What was observed during troubleshooting.
Example:
"Error was confirmed during startup. Power source, power cord, external accessories, foot pedal, instruments, and visible connectors were checked. Error persisted with all accessories removed, indicating likely RF calibration or internal generator service condition."
Resolution
What action was taken.
Example:
"Removed unit from service and labeled Out of Service. Sent for bench evaluation and RF energy calibration. Unit not returned to clinical use pending successful calibration, testing, and service verification."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Error E356 on the Valleylab FT10 should be treated seriously because RF calibration relates directly to controlled energy delivery. Clinical Engineering should verify the message, rule out simple external causes, remove questionable accessories, and escalate appropriately when the error persists. Good documentation protects the patient, the technician, and the clinical team.
That is successful troubleshooting.