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 - Error U16: Hood - Lack of Communication
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, error U16 indicates a communication failure between the oven's main power board and the integrated hood's power board. This often stems from a faulty connection cable or issues with either the hood or oven power boards. Begin by checking and reseating the communication cable in alternative ports before considering component replacement.
Technical Details
Repair Steps:
- Isolate Power: Safely disconnect the UNOX BAKERLUX SHOP.Pro unit from its main power supply to prevent electrical hazards before proceeding with any internal inspections.
- Access Boards: Locate and access both the oven power board and the hood power board. Refer to the unit’s wiring diagrams for precise locations if necessary.
- Reseat Connection Cable: Identify the communication cable connecting the oven power board to the hood power board. Carefully disconnect and reconnect this cable to a different, available socket on the oven power board (specifically ports P9, P10, P11, or P12) and the hood power board (specifically ports P5 or P6). Ensure connections are firm and secure.
- Test for Persistence: Restore power to the unit and observe if the U16 alarm persists.
- Replace Connection Cable: If the alarm continues, the communication cable itself may be faulty. Disconnect power, remove the existing cable, and replace it with a new, genuine UNOX replacement communication cable. Restore power and re-test.
- Replace Hood Power Board: If the new cable does not resolve the issue, disconnect power and replace the hood power board. Restore power and test the unit.
- Replace Oven Power Board: If replacing the hood power board does not resolve the U16 alarm, revert to the original hood power board (if it was functional) and then proceed to disconnect power and replace the oven power board. This is a last resort as the oven power board is typically a more complex and expensive component. Restore power and test the unit thoroughly.
Common Questions:
Q: What does “lack of communication” mean for my UNOX BAKERLUX SHOP.Pro unit?
A: A lack of communication error, like U16, signifies that the oven’s main control system cannot establish a stable data link with the integrated hood’s control board. This prevents the oven and hood from operating in sync, potentially impacting ventilation and overall system functionality.
Q: Is it safe to operate my oven if the U16 communication error persists?
A: It is generally not recommended to operate your UNOX BAKERLUX SHOP.Pro oven with a persistent U16 error. Proper hood operation is crucial for removing steam, smoke, and heat, ensuring kitchen safety and optimal cooking conditions. The oven may also be programmed to prevent operation if critical safety components like the hood are not communicating.
Q: What is the most common cause of the U16 error, and how can I prevent it?
A: The most common cause for U16 is often a loose, damaged, or faulty communication cable between the oven and hood power boards. To prevent this, ensure all connections are secure during installation and routine maintenance. Avoid stressing the cable, and consider periodic inspection, especially if the unit is moved or serviced frequently.
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.