Merrychef e2s - E117: see E115 MAGNETRON OVERHEAT - Old firmware related to Magnetron Overheat

🛑 Critical / Stop Operation
Warning: The information provided here is for educational purposes only. Working with commercial kitchen equipment involves high voltage, gas, and high temperatures. We strongly recommend contacting a certified service technician for any repairs. We are not responsible for any damage or injuries resulting from DIY repair attempts. This information is provided 'as is' without any guarantees of completeness or accuracy.

TLDR

On your eikon® e2s unit, error E117: see E115 MAGNETRON OVERHEAT indicates the magnetron safety thermostat has opened, likely due to outdated firmware. This protection mechanism stops cooking to prevent component damage. Updating the oven's firmware to the latest version is the primary resolution for this issue.

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Technical Details

Repair Steps:

  1. Verify Error and Symptoms: Confirm the oven is displaying error code E117, referencing E115 MAGNETRON OVERHEAT. Note if the oven stopped during a cook cycle and if it’s completely non-operational.
  2. Inspect for Obvious Issues: While old firmware is the primary cause, quickly check around the oven for any obvious blockages to cooling vents or external damage that might exacerbate heat issues. Ensure the oven’s environment is not excessively hot.
  3. Access Merrychef Technical Support: Navigate to merrycheftechnical.com. You will need to register or log in to access the firmware download section specific to the eikon® e2s model.
  4. Download Latest Firmware: Identify and download the most up-to-date firmware version for your specific MERRYCHEF eikon® e2s unit. Ensure you select the correct model variant if there are multiple.
  5. Prepare USB for Firmware Update: Transfer the downloaded firmware file onto a clean USB flash drive. Follow Merrychef’s instructions regarding USB formatting (e.g., FAT32) and file placement, as incorrect preparation can prevent the update.
  6. Load Firmware onto the Oven: Power down the oven, then insert the prepared USB drive into the designated USB port on the eikon® e2s unit. Power the oven back on and follow the on-screen prompts or service manual instructions to initiate the firmware update process. This often involves accessing a service menu.
  7. Test Oven Operation: Once the firmware update is complete and the oven has rebooted, attempt to run a short test cook cycle. Monitor for the E117 error and verify normal operation. The updated firmware should address the safety thermostat tripping issue.
  8. Professional Service (If Error Persists): If, after successfully updating the firmware, the E117 error continues to appear, it indicates a potential hardware fault. This could involve the magnetron itself, the magnetron safety thermostat, a component in the 12VDC safety circuit, or the control PCB. In this scenario, contact a certified Merrychef service technician for a detailed diagnosis and repair.

Common Questions:

Q: Why would old firmware cause a magnetron overheat error?

A: Outdated firmware might contain bugs or lack optimized control algorithms that properly manage magnetron power output, cooling fan speeds, or temperature monitoring. This can lead to the magnetron operating outside its safe parameters, causing its safety thermostat to trip as a protective measure.

Q: Can I ignore the E117 error and continue using the oven?

A: No, you should never ignore an E117 or MAGNETRON OVERHEAT error. This indicates a critical safety thermostat has opened to prevent severe overheating, potential damage to the magnetron and oven components, or even a fire hazard. Discontinue use immediately until the issue is resolved.

Q: What if I update the firmware, and the E117 error still appears?

A: If a firmware update does not resolve the E117 error, the problem likely lies with a physical component. This could be a faulty magnetron, a defective safety thermostat, an issue within the 12VDC safety circuit, or a problem with the main control board. At this point, professional diagnosis and repair by a certified technician are required.

When to call a technician

For this error, we recommend calling a certified technician. Do not continue operation or attempt repair yourself.

  • Equipment shows a critical or stop-operation fault.
  • You smell gas, burning, or see smoke or sparks.
  • Error returns after following the steps above.
  • You are not trained to work on this equipment.
  • Warranty or safety could be affected by DIY repair.

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