Unox AS03 Error Code

What does Unox AS03 mean?

AS03 is a lack-of-communication alarm on the static oven accessory. The oven can no longer communicate with the static oven, so it raises this alarm. The main oven can still be used; the static accessory is unavailable until the communication link is restored.

Symptoms

• AS03 shown referencing the static oven
• Static oven unresponsive
• Main oven still usable
• Alarm persists across restarts

Common causes

• Loose or faulty communication cable to the static oven
• Static oven board fault
• Connector problem
• Static oven not powered

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Diagnostic steps

1. Check power

   Confirm the static oven is powered, as it cannot communicate without power.

2. Inspect the data cable

   With power off, check the communication cable and connectors to the static oven.

3. Reseat and test

   Reconnect the cable and measure its continuity with a multimeter.

4. Service the board

   Replace the static oven board if communication cannot be restored and retest.

When to call a professional

AS03 affects the static oven accessory. Diagnosing the communication wiring and board requires accessing the accessory electronics; have a qualified Unox technician investigate if reseating the cable does not restore communication.