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 ground fault circuit interrupter (GFCI) triggered
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, an immediate GFCI trip upon power-up typically indicates an electrical leakage. This specific symptom, combined with an internal transformer issue, points to a faulty power board. Replacement of the power board is essential to resolve the electrical fault and restore safe operation.
Technical Details
Repair Steps:
- Safety First: Ensure the unit is completely disconnected from the main power supply at the breaker panel. Always verify zero voltage with a multimeter before proceeding.
- Access the Power Board: Carefully open the oven’s service panel to gain access to the main power board. Refer to the UNOX service manual for the exact location and access procedure for your specific BAKERLUX SHOP.Pro model.
- Inspect for Visible Damage: Visually inspect the power board for any signs of electrical arcing, burnt components, swollen capacitors, or discolored areas, especially around the transformer component. Check wiring for frayed insulation or loose connections.
- Confirm Transformer Leakage (Optional for Advanced Diagnostics): While disconnected, a qualified technician may perform insulation resistance tests (Megger test) on the transformer within the power board to confirm electrical leakage if direct replacement isn’t immediately chosen. However, given the immediate GFCI trip, leakage is highly probable.
- Replace the Power Board: Disconnect all wiring harnesses and mounting screws securing the existing power board. Install the new, genuine UNOX replacement power board, ensuring all connections are securely re-established according to the wiring diagram.
- Reassemble and Test: Securely close all service panels. Carefully reconnect the unit to the main power supply and attempt to power it on. Monitor the GFCI to ensure it does not trip. Verify all oven functions, including heating elements and fans, operate correctly.
Common Questions:
Q: Why does my GFCI trip immediately when I turn on the UNOX BAKERLUX SHOP.Pro?
A: An immediate GFCI trip almost always indicates an electrical fault, such as a short circuit or ground leakage, within the appliance’s circuitry or components, often starting with the power board’s transformer.
Q: Can I repair the transformer on the power board instead of replacing the entire board?
A: While technically possible for highly specialized electronic repair, it’s generally not recommended for commercial kitchen equipment. Replacing the complete power board ensures all associated components are new and calibrated, providing a more reliable and safer long-term solution.
Q: What are the potential risks if I ignore a GFCI trip on my oven?
A: Ignoring a GFCI trip can lead to serious hazards, including electrical shock, fire, and permanent damage to the oven’s electrical system. It’s a critical safety mechanism indicating a dangerous electrical fault that must be addressed immediately.
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.