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 - Power Board Damaged - Does Not Turn
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, "Power board damaged" signifies a critical failure preventing the oven from turning on. This is often due to the power board failing to supply the necessary 12 VDC to the control panel. You must measure the voltage output at the P9 socket and replace the power board if it's not delivering 12 VDC.
Technical Details
Repair Steps:
- Isolate Power: Before any inspection or repair, ensure the UNOX CHEFTOP or BAKERTOP MIND.Maps™ unit is completely disconnected from its main power supply. Turn off the circuit breaker and unplug the unit for maximum safety.
- Access the Power Board: Carefully open the oven’s service panel to gain access to the main power board. Refer to your specific UNOX model’s service manual for the exact location and access procedure, as it can vary.
- Identify the P9 Socket and Wires: Locate the P9 socket on the power board. Identify the blue and brown wires connected to this socket. These typically carry the low-voltage supply to the control panel.
- Measure Voltage Output: With the power temporarily restored (exercise extreme caution, as components will be live), set your multimeter to VDC (Volts Direct Current). Carefully place the multimeter probes between the blue and brown wires on the P9 socket.
- Verify 12 VDC Supply: The expected reading should be approximately 12 VDC. If your multimeter shows a significantly lower voltage, no voltage, or an unstable reading, it confirms the power board is not correctly supplying power to the control panel.
- Replace the Power Board: If the power board fails to supply the required 12 VDC, the board itself is faulty. Disconnect power again and carefully remove the damaged power board. Install a new, genuine UNOX replacement power board, ensuring all connections are secure and correctly seated.
- Reassemble and Test: Once the new power board is installed, carefully reassemble the oven’s service panel. Restore power to the unit and attempt to turn it on. The oven should now power up and function normally if the power board was the sole issue.
Common Questions:
Q: Why is my UNOX CHEFTOP/BAKERTOP oven not turning on?
A: A common cause is a damaged power board, specifically its inability to deliver the crucial 12 VDC power to the control panel. This prevents the oven’s main functions from initiating.
Q: What is the significance of the P9 socket and 12 VDC for the control panel?
A: The P9 socket is the designated connection point where the power board supplies low-voltage DC power to the control panel. This 12 VDC is essential for the control panel to initialize and operate the oven’s user interface and logic circuits.
Q: Is it safe to replace the power board myself, or should I call a technician?
A: Replacing a power board involves working with electrical components and requires expertise in safety protocols and proper component handling. For safety and to ensure correct installation, it is highly recommended to have a certified commercial kitchen technician perform this repair.
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.