Error Code
high
Unox OVEN – Control Panel or USB Board Defective – Buzzer Does Not Sound
On your CHEFTOP and BAKERTOP MIND.Maps™ unit, a non-sounding buzzer often indicates…
Unox OVEN - LCD Screen Damaged - Control Panel Does Not Respond
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 CHEFTOP and BAKERTOP MIND.Maps™ unit, a damaged LCD screen and unresponsive control panel typically indicate a complete hardware failure of the display assembly. This critical issue prevents all user interaction and machine operation, rendering the oven unusable. The primary and often sole solution involves replacing the complete control panel unit.
Technical Details
Repair Steps:
- Safety First: Before beginning any work, always disconnect the UNOX unit from the main power supply. Turn off the circuit breaker dedicated to the oven to prevent electrical shock.
- Access the Control Panel: Open the oven’s side or top access panel, depending on the specific CHEFTOP/BAKERTOP model, to gain access to the rear of the control panel assembly. Refer to the official UNOX service manual for your specific model for precise access instructions.
- Visual Inspection and Documentation: Carefully inspect the wiring and ribbon cables connected to the existing control panel. Take clear photographs of all connections before disconnecting them; this will aid in correct reassembly.
- Disconnect Electrical Connections: Systematically disconnect all power cables, data cables, and ribbon cables from the back of the damaged control panel. Pay close attention to any locking mechanisms on connectors.
- Remove the Old Control Panel: Unfasten the screws or clips securing the control panel assembly to the oven chassis. Carefully remove the damaged control panel from its mounting.
- Install the New Control Panel: Position the new UNOX replacement control panel in the exact location where the old one was removed. Secure it using the original screws or clips, ensuring it is firmly seated.
- Reconnect Electrical Connections: Using your reference photos, meticulously reconnect all power cables, data cables, and ribbon cables to the new control panel. Ensure all connections are secure and properly oriented.
- Restore Power and Test: Close any access panels that were opened. Restore power to the UNOX unit by turning on the circuit breaker. Power on the oven and test the functionality of the new LCD screen and control panel. Verify all touch functions and menu navigation.
- Configuration (If Applicable): Some new control panels may require initial configuration or software updates. Follow any on-screen prompts or consult the service manual for specific setup procedures for the new panel.
Common Questions:
Q: What typically causes the UNOX control panel LCD screen to become damaged?
A: Common causes include physical impact (e.g., dropping objects on the screen), liquid ingress from cleaning or spills, prolonged exposure to high heat or humidity, or internal electrical faults such such as power surges, which can degrade display components over time.
Q: Is it possible to repair just the LCD screen, or must I replace the entire control panel on my UNOX unit?
A: For UNOX CHEFTOP and BAKERTOP MIND.Maps™ units, the LCD screen and touch digitizer are typically integrated into a sealed control panel assembly. Attempting to repair only the screen is generally not feasible, not supported by the manufacturer, and often leads to further complications. Replacement of the entire control panel unit is the standard and recommended solution.
Q: What steps should I take if I’ve replaced the control panel, but the unit still doesn’t respond or display correctly?
A: First, meticulously re-check all ribbon cables and electrical connections to ensure they are securely seated and correctly oriented. Verify that the replacement control panel is the exact correct part number for your specific UNOX model. If the problem persists, the issue might lie with the main control PCB or a communication fault, requiring a certified technician for advanced diagnostics.
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.