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 - No Steam Production Due to Insufficient Inflow Water Pressure
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 lack of steam production typically indicates insufficient inflow water pressure. Begin by measuring the main water supply pressure to ensure it meets UNOX specifications. If the supply is adequate, next check the pressure downstream of the pressure reducer, as a faulty reducer is a common cause preventing proper steam generation.
Technical Details
Repair Steps:
- Assess Initial Symptoms: Confirm the oven is not producing steam during operations that specifically require it (e.g., combi mode, steaming cycles). Verify there are no other error codes displayed that might indicate a different fault.
- Measure Inflow Water Pressure: Locate the main water inlet connection for the oven. Using a calibrated pressure gauge, measure the static inflow water pressure before any internal oven components like pre-filters or the pressure reducer.
- Check UNOX Specifications for Inflow Pressure: Verify if the measured pressure is within the UNOX specified range of 1.5 to 6 bar.
- If the pressure is NOT within 1.5 – 6 bar: The external water supply pressure is non-compliant. Investigate the building’s main water supply, external pressure regulating valves, or any clogged pre-filters. Rectify the external pressure issue to meet UNOX specifications.
- If the pressure IS within 1.5 – 6 bar: The main supply is adequate. Proceed to the next step, as the issue lies further downstream within the oven’s water circuit.
- Measure Pressure Downstream of Pressure Reducer: Locate the pressure reducer valve on the oven’s water inlet line, typically after any initial filters. Connect a pressure gauge downstream (after) this reducer to measure its output pressure.
- Verify Pressure Reducer Output: Check if the pressure reading downstream of the reducer is approximately 2.3 bar.
- If the pressure is NOT 2.3 bar: The pressure reducer is faulty and requires replacement. Install a new pressure reducer and ensure it is properly adjusted to deliver 2.3 bar to the oven.
- If the pressure IS 2.3 bar: The pressure reducer is functioning correctly, indicating that insufficient inflow pressure might not be the root cause as initially identified. In this scenario, proceed with further diagnostics to check other components of the steam generation system, such as the solenoid valve, steam generator heating elements, drain valve operation, or level sensors.
- Test Oven Operation: After performing any necessary adjustments or part replacements, restart the oven and initiate a steam-requiring program to confirm that steam production has been restored and the oven functions correctly.
Common Questions:
Q: What is the optimal water pressure for a UNOX BAKERLUX SHOP.Pro oven?
A: The optimal static inflow water pressure specified by UNOX for the BAKERLUX SHOP.Pro series is between 1.5 and 6 bar. After the internal pressure reducer, the pressure should be consistently regulated to approximately 2.3 bar for proper steam generation.
Q: Can I operate my UNOX oven without steam functionality?
A: While some dry cooking functions (e.g., baking, roasting) might still be available, the oven’s combi-steaming and steam-only capabilities will be severely limited or entirely non-functional without proper steam production. This significantly impacts cooking quality and menu versatility.
Q: What are common causes of low water pressure in commercial kitchen equipment?
A: Common causes include issues with the building’s main water supply, clogged external water filters or sediment traps, faulty external pressure regulating valves, blockages in the supply lines leading to the oven, or internal component failures like a faulty pressure reducer or clogged internal filters within the oven itself.
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.