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 - DRY.Maxi System Open - Does Not Cook Evenly
Caution / Monitor Closely
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, an "open DRY.Maxi system" leads to uneven cooking. This indicates a potential issue with the power supply to the DRY.Maxi valve or the valve itself. Thoroughly troubleshoot the power board and the DRY.Maxi valve to restore optimal cooking performance.
Technical Details
Repair Steps:
- Set the oven to t = inf, T = 100 °C, and 100% steam. This puts the system in a state where the DRY.Maxi should be actively controlled.
- With a multimeter set to V AC, measure the power supply between PIN N and VENT of the P4 socket of the power board. This verifies if the control board is sending power to operate the DRY.Maxi system.
- If you have a power supply reading, it indicates the power board is likely sending the command, but the system remains “open.” In this case, replace the power board.
- If there is no power supply, check whether the DRY.Maxi valve is physically open or stuck in an open position.
- If the DRY.Maxi valve is observed to be open despite no power signal, it implies a mechanical failure or internal fault. Replace the DRY.Maxi valve.
- If the valve is not open and there’s no power, further investigation into the control system or wiring may be necessary, but this error path typically points to the valve or board.
Common Questions:
Q: What is the UNOX DRY.Maxi system?
A: The UNOX DRY.Maxi system is a crucial component for controlling humidity within the oven cavity, ensuring precise cooking results by extracting excess moisture. When it’s open inappropriately, it leads to uneven cooking and degraded food quality.
Q: Why is “oven does not cook evenly” a significant problem?
A: Uneven cooking can result in food that is undercooked in some areas and overcooked in others, leading to inconsistent product quality, potential food safety issues, and increased food waste in a professional kitchen environment.
Q: Can I continue to use my UNOX oven if the DRY.Maxi system is open?
A: While the oven may still operate, using it with an open DRY.Maxi system will lead to inconsistent and uneven cooking results, potentially compromising food quality and safety. It’s recommended to address the issue promptly for optimal performance.
When to call a technician
Consider calling a certified technician if:
- The error keeps coming back after you've tried the steps above.
- You're not comfortable doing the checks or repairs yourself.
- You notice unusual noise, smell, or behaviour.
- Equipment is under warranty and you want official service.
- You need the unit back in service quickly with minimal downtime.