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 - Circuit breaker triggers during cooking program
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 circuit breaker trip during a cooking program typically indicates a short circuit within a major electrical component. This often points to a faulty motor, heating element, or steam solenoid valve. A systematic diagnostic process is required to isolate and replace the specific defective component.
Technical Details
Repair Steps:
- Initial Test for Motor Short: Set a cooking program with an infinite time (t = inf), a low temperature (T = 30 °C), and fan speed (v = 2). Run the oven.
- If the circuit breaker triggers, it indicates that at least one motor is shorted. Test for electrical continuity between the black and red wires of the motor socket using a multimeter set to ohms. If continuity is present, replace the faulty motor.
- Proceed to Heating Element Test: If the circuit breaker does not trigger in the previous step, set the temperature to a high value (T = 260 °C) and run the oven.
- If the circuit breaker now triggers, it means at least one heating element is shorted. Test for electrical continuity between the cable harness of the heating element coils with a multimeter set to ohms. If continuity is found, replace the damaged heating element.
- Final Test for Steam Solenoid Valve: If the circuit breaker still does not trigger after the high temperature test, set the STEAM.Plus function to 100% and run the oven.
- If the circuit breaker triggers at this point, it indicates that the steam solenoid valve is shorted. Test for electrical continuity between the cable harnesses of the solenoid valve using a multimeter set to ohms. If continuity is present, replace the faulty solenoid valve.
Common Questions:
Q: Why does my UNOX oven’s circuit breaker trip during a cooking program?
A: A circuit breaker trip typically signifies an electrical short circuit within a critical component like the oven’s motor, heating elements, or the steam solenoid valve, which are under load during operation.
Q: How can I systematically identify the component causing the circuit breaker to trip?
A: You can isolate the issue by running the oven through a series of tests: first with low temperature (motors), then high temperature (heating elements), and finally with full steam (steam solenoid valve). Check for continuity (shorts) on the suspected components after each test.
Q: Is it safe to continue using my UNOX oven if the circuit breaker frequently trips?
A: No, it is unsafe. A repeatedly tripping circuit breaker indicates a serious electrical fault that can pose a fire hazard, further damage the appliance, or lead to electrical shock. Discontinue use immediately and perform diagnostics or contact a qualified technician.
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.