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 - Temperature Probe Not Calibrated - 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, if the temperature probe is uncalibrated, it will lead to uneven cooking. This issue arises when there's a difference of 5 °C or less between the set temperature and the actual chamber temperature. To resolve this, apply a precise offset calibration through the oven's service menu.
Technical Details
Repair Steps:
- Assess Temperature Discrepancy: Utilize a separate, externally calibrated temperature probe to measure the actual temperature within the cooking chamber. Position this calibrated probe as close as possible to the oven’s internal temperature probe. Compare the reading from your calibrated probe with the temperature displayed on the UNOX CHEFTOP or BAKERTOP MIND.Maps™ unit.
- Calculate the Required Offset: If you observe a temperature difference (Tset – Tchamber) of 5 °C or less, an offset needs to be applied. For example, if the set temperature (Tset) is 180 °C and the actual chamber temperature (Tchamber) measured by your calibrated probe is 176.9 °C, the difference is +3.1 °C. The UNOX system uses a scale where 0.1 °C equals 1 unit in the offset value. Therefore, a +3.1 °C difference requires setting a -31 offset (i.e., you are compensating for the oven reading too high by 3.1°C, so you want it to read 3.1°C lower, hence -31).
- Apply the Offset: Access the service menu on your UNOX CHEFTOP or BAKERTOP MIND.Maps™ unit. Refer to the specific instructions provided in the “BAKERLUX™ Service and User Menu” (or the equivalent MIND.Maps™ Service Menu for your model) for detailed guidance on how to navigate to the temperature probe offset setting and input the calculated value.
- Verify Calibration: After applying the offset, allow the oven to stabilize at a set temperature, then re-measure the chamber temperature with your calibrated probe. Ensure that the offset has effectively corrected the discrepancy and the oven is now cooking evenly.
Common Questions:
Q: Why is my UNOX oven cooking unevenly?
A: Uneven cooking in your UNOX CHEFTOP or BAKERTOP MIND.Maps™ unit is often caused by an uncalibrated temperature probe, which provides inaccurate readings and leads to inconsistent heat distribution within the chamber.
Q: How do I know if my UNOX oven’s temperature probe needs calibration?
A: You can determine if calibration is needed by comparing the oven’s displayed temperature to a reading from a separate, externally calibrated probe placed inside the chamber. If the difference is 5 °C or less, an offset is typically required.
Q: What is a temperature probe offset and how is it applied in a UNOX oven?
A: A temperature probe offset is a numerical adjustment made in the oven’s service menu to compensate for minor inaccuracies in the internal probe’s reading. It’s calculated based on the difference between the set and actual temperatures, with 0.1 °C equaling 1 unit of offset.
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.