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 AL01/A07: Prover 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 AL01/A07 signals a critical chamber temperature probe alarm within the prover. This indicates a disconnected or faulty probe, or an issue with the prover's power board. Immediately check the probe's connection to socket P7 and test its impedance; replace the probe or power board as needed to restore proper function.
Technical Details
Repair Steps:
- Safety First: Always disconnect the unit from its main power supply before performing any inspections or repairs to prevent electrical shock.
- Verify Probe Connection: Access the prover’s power board and visually inspect the connection of the chamber temperature probe. Ensure it is securely connected to socket P7. If loose, firmly re-seat the connector.
- Measure Probe Impedance:
- Carefully disconnect the temperature probe from the power board.
- Set your multimeter to the ohm (Ω) setting.
- Measure the impedance of the probe leads.
- At approximately 25 °C (77 °F), a healthy probe should typically read around 110 ohms. Deviations from this value (e.g., open circuit, short circuit, or significantly different resistance) indicate a faulty probe.
- Replace Temperature Probe: If the impedance measurement is incorrect or the probe shows signs of physical damage, replace the existing probe with a new, genuine UNOX chamber temperature probe.
- Test Prover Operation: After replacing the probe (or ensuring a good connection), reassemble the unit and restore power. Initiate a test cycle, setting the prover to approximately 50 °C (122 °F) to confirm stable temperature regulation and the absence of the AL01/A07 alarm.
- Replace Power Board: If the alarm persists after confirming the probe’s connection and replacing a potentially faulty probe, the issue likely lies with the prover power board. Replace the power board, ensuring proper connection of all components, then re-test the unit.
Common Questions:
Q: What does the AL01/A07 error code specifically indicate on my UNOX BAKERLUX SHOP.Pro?
A: The AL01/A07 error code signals an alarm related to the prover’s chamber temperature probe. This means the control system is not receiving valid temperature readings, usually due to a disconnected, faulty, or shorted probe, or a problem with the main control board.
Q: How can I accurately test the chamber temperature probe?
A: To test the probe, disconnect it and use a multimeter set to ohms. At room temperature (around 25 °C or 77 °F), a healthy UNOX probe should read approximately 110 ohms. Significant deviations or an open circuit reading indicate a faulty probe that needs replacement.
Q: What if the AL01/A07 alarm persists even after I’ve replaced the temperature probe?
A: If the new probe is correctly installed and the alarm continues, the issue likely stems from the prover’s power board. The board might not be correctly processing the probe’s signal or could have an internal fault. In this scenario, replacing the prover power board would be the next troubleshooting step.
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.