Unox WC02 Error Code
Hood power board over temperature warning.
Source: Unox/Unox_XACC-0513-EPLM_ServiceManualAll_CommercialKitchen.pdf
What does Unox WC02 mean?
WC02 is a power board over-temperature warning on the hood accessory. The hood's power board is running too hot. Because it is a peripheral, the oven can still be used while the hood function is restricted and the warning flags the overheating electronics.
Symptoms
- WC02 warning referencing the hood
- Hood power board running hot
- Hood function restricted, oven still usable
- Warning clears as the board cools
Common causes
- Inadequate cooling of the hood power board
- High ambient temperature around the hood
- Cooling airflow issue
- Hood power board fault
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Diagnostic steps
Allow cooling
Let the hood cool and check whether the warning clears.
Check cooling airflow
Verify cooling airflow over the hood board and clearance around the hood.
Check the installation
Confirm the hood is installed per the manual with adequate ventilation.
Service the board
If overheating continues with correct cooling, have the hood power board checked and replaced if faulty.
When to call a professional
WC02 affects hood electronics. Diagnosing the cooling and the hood power board requires accessing the hood and mains-voltage work; have a qualified Unox technician investigate if a cool-down does not resolve it.
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Other Unox Error Codes
Motor thermal protection alarm (permanent error) — the fan motor's thermal protection has tripped.
Safety thermostat alarm — the chamber safety thermostat has tripped above its limit.
Temperature probes alarm — a cooking chamber temperature probe is damaged or disconnected.
Communication error with the power board — the control board lost communication with the power board.
Gas alarm — a fault in the gas burner/ignition system (split into multiple AF23 conditions on later software).
Wrong position of Pollo valve.
Trolley is missing.
Tank missing or safety thermostat fault.
Chamber ceiling temperature too high.
Chamber over-temperature condition (Case 1: T > 150 °C / 302 °F; Case 2: T < 150 °C).
Single-point or multi-point core probe completely damaged.
Chamber temperature probe warning.