Unox AF24

What does Unox AF24 mean?

AF24 indicates the Pollo valve is in the wrong position. The control system has detected that this valve is not in the expected state for the current operation, so the oven raises an alarm. It points to a valve, actuator or position-feedback problem rather than a temperature or probe fault.

Symptoms

• AF24 shown on the control panel
• Oven stops or restricts the affected function
• Valve not moving to its expected position
• Alarm recurs when the function is requested

Common causes

• Pollo valve mechanically stuck or jammed
• Valve actuator or motor fault
• Position-feedback signal incorrect or missing
• Wiring fault to the valve

Diagnostic steps

1. 01

   Power down and inspect the valve

   Turn off the power supply and check the Pollo valve for mechanical obstruction or jamming.

2. 02

   Check the actuator

   Verify the valve actuator drives the valve to its correct position and is not seized.

3. 03

   Verify the feedback signal

   Confirm the position-feedback signal reaches the control board so it can read the valve's true position.

4. 04

   Check the wiring

   Inspect and test the wiring between the valve and the board, restoring any loose or open connection.

When to call a professional

AF24 involves a specific internal Unox valve and its position feedback. Diagnosing the actuator and wiring requires opening the oven and Unox component knowledge. If a quick check of the valve for obstruction does not clear it, have a qualified Unox technician inspect the valve and its control circuit.