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 WL02/U07: PROVER - Power Board Prover Temperature (Chamber Temperature Probe Alarm)
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 WL02/U07 indicates an alarm related to the prover's power board temperature or chamber temperature probe. This often points to an issue with cooling, water supply to the prover, or a faulty component like the water solenoid valve or the prover's power board. Immediate action is required to prevent damage and restore full functionality.
Technical Details
Repair Steps:
- Initial Check and Cooling: Allow the prover to cool down completely. Verify proper ventilation around the unit as per UNOX installation guidelines. Restart the oven to see if the error persists.
- Installation Verification: Confirm the prover was installed strictly according to the UNOX installation manual. Incorrect installation can impede cooling or water supply, leading to temperature issues.
- Water Supply Check: Ensure the main water tap supplying the prover is fully open and that there is adequate water pressure. A lack of water can lead to overheating if the prover relies on steam/humidity for temperature regulation.
- Solenoid Valve Power Check: Using a multimeter set to V AC, measure the voltage at connector P4 on the main power board. Confirm that 230 V AC is being supplied to the water solenoid valve.
- Water Flow Verification: If the solenoid valve is receiving power, check if water is actually flowing through it. Observe inside the prover chamber for water exiting the injector. This indicates whether the valve is mechanically opening and allowing water passage.
- Replace Water Solenoid Valve: If the solenoid receives power but no water flows, or if water flow is inadequate (e.g., restricted flow), replace the water solenoid valve.
- Replace Prover Power Board: If the problem persists after checking and replacing the solenoid valve, or if initial temperature readings are excessively high without clear external cause, replace the prover power board.
Common Questions:
Q: What does error WL02/U07 specifically indicate for my UNOX BAKERLUX SHOP.Pro?
A: This error code signifies an alarm related to the prover’s power board temperature or the chamber’s temperature probe. It suggests the prover is either overheating, not receiving adequate water, or has a fault in its control circuitry or sensors.
Q: Can I continue to use my UNOX oven if the WL02/U07 error is active?
A: It is not recommended to continue using the prover function while this error is active. Overheating can damage components, and improper water supply will lead to poor proofing results and potential further faults. Address the issue promptly to avoid more extensive repairs.
Q: How can I prevent the WL02/U07 error from recurring after repair?
A: Ensure proper ventilation around the prover, regularly check water supply pressure and filter status, and adhere strictly to UNOX’s cleaning and maintenance schedules. Proper installation and environmental conditions are crucial for long-term reliability.
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.