Merrychef e2s - E107: COMM ERROR - Communication Error Between QTS & SRB

🛑 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 MERRYCHEF eikon® e2s unit, error E107 indicates a communication failure between the QTS (Quick Touch Screen) and SRB (Switching & Relay Board). This often points to a loose or faulty J45 communication cable connecting these two critical boards. Inspect the cable and connections, or replace the cable to restore proper communication.

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Technical Details

Repair Steps:

  1. Safety First: Power Down and Disconnect. Before any inspection or repair, ensure the MERRYCHEF eikon® e2s oven is completely powered off and disconnected from the main electrical supply for safety.
  2. Perform a System Power Cycle. With the oven safely off, wait at least 30 seconds. Reconnect the power supply and switch the oven on. Observe the boot-up sequence to see if the E107 error clears or is immediately followed by E000, which indicates successful communication establishment.
  3. Inspect J45 Cable Connections. Access the internal components of the oven (refer to your eikon® e2s service manual for specific panel removal instructions). Locate the QTS (Quick Touch Screen) board and the SRB (Switching & Relay Board). Carefully inspect the J45 communication cable connected between these two boards. Ensure it is firmly seated at both ends without any looseness or visible signs of being partially unplugged.
  4. Check J45 Communication Cable Integrity. Examine the entire length of the J45 cable for any physical damage such as cuts, pinches, frayed wires, or bent/corroded pins on the connectors. Even minor damage can cause intermittent or complete loss of communication.
  5. Replace the J45 Communication Cable. If the cable connections are secure and there is no visible damage, but the E107 error persists (without E000 following), the J45 communication cable is likely faulty. Obtain an OEM replacement J45 communication cable specifically for your MERRYCHEF eikon® e2s and carefully replace the existing one, ensuring proper routing and secure connections.
  6. Verify Firmware Status (If Applicable). Remember that E107 can also appear during firmware updates as a temporary condition. If you recently performed or attempted a firmware update, ensure it completed successfully. If not, a re-attempt of the update with a verified stable power supply might be required after checking the cable.

Common Questions:

Q: What does E107: COMM ERROR signify on my MERRYCHEF eikon® e2s?

A: It indicates a loss of communication between the oven’s Quick Touch Screen (QTS) board and the Switching & Relay Board (SRB), which are crucial for the oven’s operational control.

Q: Can E107 appear without an actual fault?

A: Yes, E107 can briefly appear during initial oven power-up or firmware updates. If it is immediately followed by E000, communication has been established, and no underlying fault exists.

Q: What’s the primary component to check for a persistent E107 error?

A: The most common culprit for a persistent E107 error is the J45 communication cable that connects the QTS and SRB boards. Always ensure it’s securely connected and free from damage; replacement may be necessary.

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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