Error Code
high
Unox BAKERLUX SHOP.Pro – Contactors are Chattering
On your BAKERLUX SHOP.Pro unit, chattering contactors typically indicate an unstable power…
Unox BAKERLUX SHOP.Pro - The Circuit Breaker Triggered Due to Shorted Back-Cooling Fan
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 BAKERLUX SHOP.Pro unit, a tripped circuit breaker during control board reboot most commonly indicates an electrical short. The problem is typically a faulty 230 V AC back-cooling fan. Replacing this component is essential to restore proper and safe operation.
Technical Details
Repair Steps:
- Safety First: Disconnect Power. Before any inspection or repair, ensure the UNOX BAKERLUX SHOP.Pro unit is completely disconnected from its main power supply. Turn off the dedicated circuit breaker and unplug the unit if accessible.
- Access the Control Compartment. Locate and carefully remove the necessary panels (usually at the rear or top) to gain access to the control board and internal components. Refer to your oven’s service manual for exact panel removal instructions.
- Locate and Inspect the Back-Cooling Fan. Identify the 230 V AC back-cooling fan, which is typically mounted near the control board or internal electronics. Visually inspect the fan and its wiring for any signs of damage, burnt spots, melted insulation, or foreign objects obstructing the fan blades.
- Test the Back-Cooling Fan for Short Circuit. Disconnect the fan’s power connector from the control board or power supply. Using a multimeter, set to resistance (ohms) or continuity, test for a short circuit. Measure between the live (L) and neutral (N) terminals of the fan. A reading of very low resistance (near 0 ohms) or continuity from either terminal to the fan’s metal frame (ground) indicates a direct short.
- Replace the Shorted Back-Cooling Fan. If the fan is confirmed to be shorted, carefully remove its mounting hardware and wiring. Install a new, genuine UNOX 230 V AC back-cooling fan, ensuring all connections are secure and correct according to the wiring diagram.
- Reassemble and Test. Once the new fan is installed, carefully reassemble all panels. Restore power to the oven and monitor if the circuit breaker holds during the unit’s power-up and control board reboot sequence. Verify the fan operates correctly and the oven functions normally.
Common Questions:
Q: Why does my BAKERLUX SHOP.Pro trip the circuit breaker immediately on startup?
A: When your UNOX BAKERLUX SHOP.Pro trips the circuit breaker during its initial power-on or control board reboot, it almost always signifies a direct electrical short circuit within a component. The back-cooling fan is a common culprit for this specific symptom due to its continuous operation and electrical exposure.
Q: Is it safe to try and reset the circuit breaker multiple times if it keeps tripping?
A: No, it is highly unsafe and not recommended to repeatedly reset a circuit breaker that continuously trips. This indicates a persistent electrical fault, which could cause further damage to the appliance, lead to electrical fire hazards, or put personnel at risk. Always diagnose and resolve the underlying issue before restoring power.
Q: How can I verify if the back-cooling fan is truly shorted without specialized tools?
A: While a multimeter is the most reliable tool for confirming a short, a visual inspection can sometimes reveal obvious signs like burnt wiring, melted plastic, or a strong burning smell emanating from the fan or its motor. However, for conclusive diagnosis, a qualified technician with a multimeter is essential.
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.